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Sensing Others, Alissa Reed Jul 2025

Sensing Others, Alissa Reed

Theses and Dissertations

In this project, I notice how we listen and respond to animals, both through marine bioacoustics studies and rhetorical theory, and consider how we might develop new ways of noticing and interacting with animals. I hold together rhetorical theory, marine bioacoustics studies, and my observations nest sitting sea turtles to see what kind of multispecies ethic emerges from messy encounters with nonhuman others – specifically, with sea turtles nesting on the beaches of the Outer Banks in the Summer of 2020. By confronting the unavoidable moments of indecision, and even possible violence, inherent to encounters with nonhumans others, even and …


Quantifying Biomass Burning Impacts On Soil Nox Emissions And Reactive Nitrogen Cycling, Olivia Rae Steinbeck Jul 2025

Quantifying Biomass Burning Impacts On Soil Nox Emissions And Reactive Nitrogen Cycling, Olivia Rae Steinbeck

Theses and Dissertations

Nitrogen oxides (NOx = NO + NO₂) are trace gases that play a critical role in the atmosphere by influencing air quality, oxidation chemistry, and the deposition of fixed nitrogen. Historically, NOx emissions have been primarily linked to anthropogenic sources such as fossil fuel combustion, industrial activities, and agriculture. However, as successful legislation has significantly reduced these emissions, the relative importance of natural NOx sources has become an increasing concern. Soil NOx emissions are of particular interest due to their strong temperature dependence and their connection to global climate change. Rising global temperatures are expected to accelerate soil NOx emissions …


Relevant Reading: Modernizing High School Reading Lists, Michele Honeycutt Jul 2025

Relevant Reading: Modernizing High School Reading Lists, Michele Honeycutt

Theses and Dissertations

This qualitative action research study, using case study methodology, explores the modernization of high school reading lists to ensure inclusivity, cultural relevance, and engagement in contemporary educational settings. Grounded in Culturally Relevant Pedagogy, Constructivism, and Problem-Posing Theory, this research examines how diverse literary selections impact student learning, motivation, and critical thinking. The study uses semi-structured interviews, observations, and student surveys to evaluate the effectiveness of integrating contemporary texts that reflect varied cultural, social, and political perspectives. The findings highlight the tensions between traditional literary canons and efforts to introduce diverse narratives, emphasizing the challenges of book bans, parental resistance, and …


Editing Japan: Pornography Commentary As Postcolonial Revenge In China's Digital Sphere, Yichi Zhang Jul 2025

Editing Japan: Pornography Commentary As Postcolonial Revenge In China's Digital Sphere, Yichi Zhang

Theses and Dissertations

This study examines how Chinese male audiences reconstruct postcolonial masculinity through the consumption and reinterpretation of Japanese pornography. By analyzing commentary videos produced by "Team Strawberry," I argue that this phenomenon constitutes a symbolic revenge against Japan's historical dominance. Through degrading Japanese female performers and mocking Japanese culture and male actors, Chinese viewers invert colonial hierarchies, transforming sexual consumption into a nationalist project. However, this mimicry of colonial violence ultimately reinforces patriarchal structures rather than subverting them, while also framing nationalism through sexual conquest that mimics collective historical trauma. The re-editing and mocking of Japanese pornography by Chinese content creators …


Inorganic Nanoparticle And Nanoplastic Transformations And The Impact On Biouptake By Freshwater Algal Cells Using Single Cell And Single Particle Inductively Coupled Plasma Mass Spectrometry, Elizabeth Carey Bair Jul 2025

Inorganic Nanoparticle And Nanoplastic Transformations And The Impact On Biouptake By Freshwater Algal Cells Using Single Cell And Single Particle Inductively Coupled Plasma Mass Spectrometry, Elizabeth Carey Bair

Theses and Dissertations

The ubiquitous presence of nanoparticles (NPs) and nanoplastics (NPPs) and their effects on environmental and human health is a significant concern. They are used in every aspect of our lives, and while they offer many benefits, there are concerns about their impacts on ecosystems and human health. The primary aim of this dissertation is to quantify NP and NPP transformations in the presence of algae and determine how those transformations influence bioavailability. The methodology involves two complementary analytical techniques: single particle (SP) and single cell (SC) inductively coupled plasma mass spectrometry (ICP-MS). These techniques are tested and applied to two …


William Hogarth's Portraiture: A Vehicle For Social Commentary, Kaitlyn Elizabeth Hoff Jul 2025

William Hogarth's Portraiture: A Vehicle For Social Commentary, Kaitlyn Elizabeth Hoff

Theses and Dissertations

William Hogarth is often celebrated for the critiques of eighteenth-century England seen throughout his widely reproduced satirical print series and paintings, however his contributions to portraiture offer a compelling extension of his artistic vision and techniques. This research aims to explore Hogarth’s use of portraiture as a vehicle for social commentary and moral messaging, revealing broader themes of morality, nationalism, and identity among all of his works, comparing this approach to that of both his contemporaries and his own prints.

In examining Hogarth’s portraits alongside other formal portraiture, the socio-political landscape of the time, and existing scholarship, methods such as …


Aesthetic Judgment: Considering A Contemporary Standard Of Taste, Lydia Margaret Lee Jul 2025

Aesthetic Judgment: Considering A Contemporary Standard Of Taste, Lydia Margaret Lee

Theses and Dissertations

Originally published in 1757 as part of his Four Dissertations essay collection, David Hume’s essay, “Of the Standard of Taste,” occupies a prominent place in Enlightenment aesthetic studies. Due to an oversaturation of print materials being produced, eighteenth century society was concerned with evaluating and ranking the massive quantities of art being produced. Philosophers such as David Hume attempted to define criteria for determining a standard of taste, aiming to hierarchically rank works of art based on aesthetic experience. For centuries, critics such as Timothy Costelloe, Noel Carroll, David Marshall, Jonathan Friday, James Shelley, and many others have engaged in …


Ideologies Of Language, Race, And Time In U.S. Political Discourses, Paige Pinkston Jul 2025

Ideologies Of Language, Race, And Time In U.S. Political Discourses, Paige Pinkston

Theses and Dissertations

This dissertation follows how public discourses that emerged during the 2020- 2022 “Critical Race Theory Panic” played out in different contexts and at different scales in the United States, from conservative national media to South Carolina legislative action. While political discourse has become increasingly nationalized (Berry & Sobieraj, 2014), new legislation has largely taken place at the state level (Johnson, 2022). Drawing on over two years of fieldwork and methods of discourse analysis, I thus examine how nationally circulating discourses about race and racism were taken up by South Carolinians to create partisan alignments and distinctions as well as to …


Reluctant Transitions: Place And Post-Extraction Politics In Southeastern Ohio, Jenna Lynn Haver Jul 2025

Reluctant Transitions: Place And Post-Extraction Politics In Southeastern Ohio, Jenna Lynn Haver

Theses and Dissertations

Based on a summer of ethnographic research in a subsection of Appalachian Ohio colloquially referred to as “The Valley,” this research challenges three narratives of this place that formulate a harmful Appalachian imaginary. The first narrative of industrycontrolled coal heritage is complicated by the way local people negotiate control over their own stories of coal and its existence outside of industry domain. The second narrative characterizes this as a space of extraction which is in tension with different social relations to varying types of energy – especially the discontinuity of the coal to fracking shift. The third narrative centers of …


Between Tajweed And Lenition: A Sociophonetic Investigation Of Pharyngealized Consonant Variation In Ammani Jordanian Arabic, Amenah Jehad Salman Jul 2025

Between Tajweed And Lenition: A Sociophonetic Investigation Of Pharyngealized Consonant Variation In Ammani Jordanian Arabic, Amenah Jehad Salman

Theses and Dissertations

Thіs dіssеrtаtіоn іnvеstіgаtеs the sосіоphоnеtіс vаrіаtіоn іn thе rеаlіzаtіоn оf phаryngeаlіzеd соnsоnаnts іn Аmmаnі Jоrdаnіаn Аrаbіс (АJА), іntrоduсіng Tаjwееd—thе study оf Qurаnіс phоnоlоgy—аs а sосіаlly sаlіеnt vаrіаblе іnfluеnсіng еvеrydаy spееch. А lеnіtеd-phаryngeаlіzеd (LP) vаrіаnt surfасеs аs аn аcоustіcаlly аnd pеrcеptuаlly іntеrmеdіаtе rеаlіzаtіоn, pоsіtіоnеd bеtwееn fully phаryngeаlіzеd (/sˤ, tˤ, dˤ, ðˤ/) аnd plаіn (/s, t, d, ð/) соnsоnаnts. Whіlе prеvіоus studіеs hаvе ехаmіnеd thе іmpасt оf mасrо-sосіаl fасtоrs suсh аs gеndеr, аgе, sосіоеcоnоmіс stаtus, аnd оrіgіnаl rеgіоnаl dіаlеct (ОRD) (Аl-Маsrі & Jоngmаn, 2004; Аlzоubі, 2017; Аbudаlbuh, 2010), nо rеsеаrch hаs examined thе rоlе оf Tаjwееd іn shаpіng sосіоphоnеtіс оutcоmеs.

Dаtа was …


Queer Inclusion In Libba Bray's Beauty Queens: The Case For Lgbtq Ya Literature, Kayla Michelle Crumbley Jul 2025

Queer Inclusion In Libba Bray's Beauty Queens: The Case For Lgbtq Ya Literature, Kayla Michelle Crumbley

Theses and Dissertations

This thesis is a time sensitive case study on the nature of Libba Bray's novel Beauty Queensand it's placement as both a metacognitive novel and discourse in the nature of queer acceptance in the publishing and media landscape of the 2010s and 2020s. This includes focusing on contextualizing the book in the changing landscape of queer acceptance and visibility in the media over the last 20 years through the lens of the inclusion in YA and how that manifest in the 2010 and 2020s book bans on LGBTQ YA fiction. The novel highlights the wider need for LGBTQ YA …


Exploring The Holistic Wellness Of Black Women Counselors, Shanta A. Jerideau Jul 2025

Exploring The Holistic Wellness Of Black Women Counselors, Shanta A. Jerideau

Theses and Dissertations

Counselor wellness is crucial for clinician longevity and ethical practice. However, there is limited literature on the holistic wellness of Black women counselors. This manuscript probes into the lived experiences of Black women counselors, particularly in relation to the sociopolitical climate and racial injustices in the United States. Utilizing Consensual Qualitative Research, we examine the experiences of 15 Black women counselors working in counselor education, private practice, and community agencies within the Southeast Region of the United States. We anticipate this approach will enhance counselor education literature and foster increased peer support.


"We Have Such Fantastic People Working Here": Using Action Research To Address Community College Burnout, Christine Pipitone Jul 2025

"We Have Such Fantastic People Working Here": Using Action Research To Address Community College Burnout, Christine Pipitone

Theses and Dissertations

This mixed-methods action research dissertation explores faculty burnout at a New Jersey community college to propose actionable, faculty-led solutions through a collaborative approach. Grounded in a theoretical framework that integrates theories of action, critical theory, and job demands–resources theory, the study included three phases that followed an explanatory sequential design. In the first phase, quantitative and qualitative data obtained through an anonymous questionnaire provided baseline information about the dimensions of burnout participants experienced. The data informed the second phase, which consisted of semi-structured focus group interviews. In the third phase, an action research team worked together to make recommendations based …


The Role Of Symmetries In Atomic, Electromagnetic, And Particle Physics, Joshua Martin O'Connor Jul 2025

The Role Of Symmetries In Atomic, Electromagnetic, And Particle Physics, Joshua Martin O'Connor

Theses and Dissertations

Symmetries in atomic, electromagnetic, and weak interaction physics are explored to understand symmetry-breaking extensions of the Standard Model of particle physics. Lorentz-violating field theories are extremely interesting theoretically, since they possess many new features that are absent in Lorentz-invariant models. We outline the formalism and experimental status of the Lorentz- and CPT-violating Standard Model Extension, in both the classical and quantum regimes. Processes such as vacuum Cerenkov radiation, which are kinematically forbidden when Lorentz symmetry is exact may become allowed when this symmetry is weakly broken. Particle decays, such as pion and kaon decays, although allowed in Lorentz-invariant theories, are …


Students’ Experiences Using Peer Review To Affect Writing Self-Efficacy And Writing Performance In An Undergraduate Mass Communications Writing Course, Nina Morrison Brook Jul 2025

Students’ Experiences Using Peer Review To Affect Writing Self-Efficacy And Writing Performance In An Undergraduate Mass Communications Writing Course, Nina Morrison Brook

Theses and Dissertations

The purpose of this action research was to examine the impact of peer review on writing self-efficacy and writing performance in an undergraduate online writing for mass communications course. The study focused on two research questions: (1) How and to what extent does structured peer review affect undergraduate students’ writing self-efficacy in an online writing for mass communications course in a large public Southeastern university? and (2) How and to what extent does structured peer review affect undergraduate students’ writing performance in an online writing for mass communications course in a large public Southeastern university? This research used peer review …


Play, Guide, Aspire: How Game Type And Trainer Involvement Shape Orientation Training Outcomes, Damla Sonmez Jul 2025

Play, Guide, Aspire: How Game Type And Trainer Involvement Shape Orientation Training Outcomes, Damla Sonmez

Theses and Dissertations

The use of gamification in orientation training has gained attention in organizational settings, yet questions remain regarding how different gamified training designs influence new employees’ emotional commitment, willingness to participate in future training, and long-term aspirations. Drawing on Stimulus–Organism–Response (SO-R) theory, Achievement Goal Theory, and Ecological Systems Theory, this dissertation investigates how game type (individual vs. team) and trainer involvement (active vs. passive) shape these outcomes.

Two experimental studies using vignette-based scenarios were conducted. Study 1 tested the direct effects of game type on emotional commitment and willingness to participate. Study 2 employed a 2 (game type) × 2 (trainer …


Monitoring And Mitigation Of Per- And Polyfluoroalkyl Substances (Pfas) In Urban Stormwater Runoff, Mustafizur Rahaman Jun 2025

Monitoring And Mitigation Of Per- And Polyfluoroalkyl Substances (Pfas) In Urban Stormwater Runoff, Mustafizur Rahaman

Theses and Dissertations

Per- and polyfluoroalkyl substances (PFAS) are emerging contaminants known for their persistence with widespread environmental and health concerns. Urban stormwater runoff could be a non-point pollution source that transports PFAS to receiving water bodies. This study analyzed types and concentrations of PFAS in stormwater runoff from Trenton and Glassboro, New Jersey, with samples collected from high- and low-traffic areas during precipitation events in February, June, July, and August 2024. Significantly higher concentrations of PFAS were identified in high-traffic areas than low-traffic areas (p< 0.05) in both cities for most sampling events, confirming the role of traffic in PFAS dispersal. To address PFAS contamination in stormwater runoff, this study evaluated the removal of six U.S. Environmental Protection Agency (USEPA)-regulated PFAS compounds from synthetic stormwater runoff using aluminum-based water treatment residuals (Al-WTRs, by-products of the drinking water treatment process). The findings demonstrated that Al-WTRs exhibited high sorption capacities and low desorption rates for PFAS, particularly for long-chain PFAS compounds such as perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS), supporting their potential as an economical and effective sorbent for stormwater PFAS management. Furthermore, the durability and sustained performance of Al-WTRs indicated their feasibility for future field-scale applications.


From Differentiation To Disease: Cyclin C Directly Coordinates Transcription And Mitochondrial Dynamics, Alicia Campbell Jun 2025

From Differentiation To Disease: Cyclin C Directly Coordinates Transcription And Mitochondrial Dynamics, Alicia Campbell

Theses and Dissertations

Organelle crosstalk is essential for coordinating cellular responses to various external cues, including stress and differentiation. Two key organelles, the nucleus and mitochondria, engage in extensive crosstalk to manage responses to a range of environmental and developmental signals. Complex processes such as stem cell differentiation and neuronal development rely on organelle crosstalk. Both processes integrate changes in gene expression with cytosolic and organellar remodeling. However, it remains unclear how these two complex processes are coordinated to achieve the desired outcome. This project concentrates on cyclin C (CCNC), a component of the Mediator Kinase Module (MKM), and its role in directly …


Effects Of Stressor Exposure And Locus Coeruleus Opioid Signaling On Coping And Anxiety-Like Behavior In Rats, John Arthur Tkaczynski Jun 2025

Effects Of Stressor Exposure And Locus Coeruleus Opioid Signaling On Coping And Anxiety-Like Behavior In Rats, John Arthur Tkaczynski

Theses and Dissertations

Stress is a physiological state of altered neuroendocrine signaling and heightened indices of behavioral vigilance and arousal in response to threatening stimuli. This project aimed to investigate the adaptations to stress that occur in the noradrenergic locus coeruleus (LC) and how these changes affect stress coping behavior. We began by investigating how adolescent restraint and predator odor stress affects coping when presented with a secondary noxious stimulus in the defensive shock probe burying task one week following stressor exposure, finding that stressed male rats demonstrate a more active coping response and stressed female rats demonstrate a more passive coping response, …


Adapting A Personalized Normative Feedback Intervention For Graduate Student Drinkers, Faith Shank Jun 2025

Adapting A Personalized Normative Feedback Intervention For Graduate Student Drinkers, Faith Shank

Theses and Dissertations

On average, graduate students consume eight drinks per week, meeting criteria for heavy drinking and highlighting the need for a cost-effective intervention. The current study examined the efficacy of personalized normative feedback (PNF) for reducing heavy drinking in graduate students. Study 1 examined the feasibility and acceptability of the intervention content to inform a randomized controlled trial (RCT) of the intervention. Results from qualitative interviews with 13 graduate students who interacted with the intervention content preferred to receive feedback about peers enrolled in the same type of degree program. Study 2 was an RCT using PNF from peers with the …


Breaking Barriers Exploring Guardianship & Public Administration Challenges Facing Egyptian Widows, Caroline Maher Jun 2025

Breaking Barriers Exploring Guardianship & Public Administration Challenges Facing Egyptian Widows, Caroline Maher

Theses and Dissertations

This thesis examines the influence of guardianship policies and the administrative infrastructure on the well-being of widows' families in Egypt. Widows in Egypt encounter significant challenges in exercising their guardianship rights due to patriarchal norms, bureaucratic hurdles, inefficient systems, and limited access to information. These obstacles can negatively impact their children's well-being, as well as economic and social stability. Despite social media activism, calls for administrative reforms, and legislative debates, no changes have occurred. This study aims to conduct in-depth exploratory qualitative research to analyze the challenges and limitations of current guardianship policies and administrative systems affecting widows’ families in …


Directivity And Sound Radiation Of Percussion Instruments And Harmonic Analysis Of The Alto Saxophone, Hanna Michelle Pavill Jun 2025

Directivity And Sound Radiation Of Percussion Instruments And Harmonic Analysis Of The Alto Saxophone, Hanna Michelle Pavill

Theses and Dissertations

This thesis investigates how musical instruments radiate sound, with a focus on directional behavior under realistic performance conditions. High-resolution measurements using a rotating microphone array were used to study percussion and woodwind instruments, providing new insight into how design, excitation, and frequency content shape acoustic output. The first set of experiments analyzed the directivity of the bass drum, triangle, and open snare. Each instrument exhibited unique radiation patterns reflecting its structure and playing method. The bass drum showed dipole-like behavior at low frequencies, transitioning to omnidirectional spreading at mid frequencies, and increasingly irregular patterns at higher frequencies. The triangle, due …


Development Of Fiber Composite Joints To Improve Folding Of Deployable Arrays, Luke Q. Gardner Jun 2025

Development Of Fiber Composite Joints To Improve Folding Of Deployable Arrays, Luke Q. Gardner

Theses and Dissertations

An origami-inspired deployable array, despite being commonly made from rigid materials, must be able to fold into its stowed configuration. This necessitates the employment of discontinuities between the panels of the array and the use of specialized joints to connect them. Compliant joints, with all their typical advantages, are useful in this application. Membrane hinges and lamina-emergent torsional (LET) arrays are two classes of compliant joints, or surrogate folds, which each feature unique benefits and drawbacks. Membrane hinges in principle are simple and flexible, providing a wide range of motion while experiencing little stress. However, perhaps their most robust variation, …


Videos As Video Game Preservation, Scott Tyler Bradshaw Jun 2025

Videos As Video Game Preservation, Scott Tyler Bradshaw

Theses and Dissertations

Video games have become culturally significant in society and are deserving of being preserved. There are many ways to preserve video games such as emulation, migration, and reissue. But recordings of video games have the special designation of being able to faithfully depict a game, which is an advantage it has over other preservation methods. This paper explores the advantages and disadvantages of various preservation methods while putting recordings forward as an equal method that can assist in its own way. Furthermore the concept of documentary style videos for video games is explored with input by archivists as well as …


Who's At Home?: Individual-And Family-Level Sociodemographic Characteristics Associated With Stay-At-Home Motherhood, Deegan Minchey Jun 2025

Who's At Home?: Individual-And Family-Level Sociodemographic Characteristics Associated With Stay-At-Home Motherhood, Deegan Minchey

Theses and Dissertations

In this study, I assess the relationship between various types of demographic variables, including individual, partner, and family-level information, and the likelihood of mothers staying at home. Using nationally representative data from the 2019,2021, and 2023 waves of the Annual Social and Economic Supplement (ASEC) to the Current Population Survey to account for differences across the COVID-19 pandemic, this analysis examines the likelihood of becoming a stay-at-home mother (SAHM) across three separate regression models. From the variables analyzed, I find that various individual, family, and partner demographic characteristics are significantly associated with the likelihood of becoming a SAHM. These results …


Fantasy Novels, Romance, And Book Boyfriends: Romantic Views And Expectations Of Young Adult Women, Kennedy Dawn Morris Jun 2025

Fantasy Novels, Romance, And Book Boyfriends: Romantic Views And Expectations Of Young Adult Women, Kennedy Dawn Morris

Theses and Dissertations

Despite its drop in popularity, reading is a pastime that is enjoyed by many. As with other forms of media, there is the question of how consuming literature impacts individuals. This research study examines how reading fantasy novels impacts the romantic views and expectations of women in emerging adulthood. Social comparison theory and parasocial relationships were utilized in order to examine how young adult women compare their relationships and relationship ideals to those of fictional characters, as well as how young adult women decide which fictional relationships and/or characters are worth their admiration. The findings of this study suggest that …


The Use Of Culturally Responsive Mentor Texts For Literacy Development In An Elementary Classroom, Ashley Vernon Jun 2025

The Use Of Culturally Responsive Mentor Texts For Literacy Development In An Elementary Classroom, Ashley Vernon

Theses and Dissertations

The purpose of this study was to examine the effectiveness of Culturally Responsive Mentor Text in literacy development in an elementary classroom. Students in this study demonstrated increases in overall literacy development in the areas of comprehension and verbal discourse when paired with Culturally Diverse texts throughout the study. This study revealed that students were able to make more connections with texts and increase discussion when recognizing unfairness and overcoming struggles.


Unifying Explainability And Machine Learning: Towards Trustworthy And Plausible Explanations Without Post-Hoc Manipulations, Ian E. Nielsen Jun 2025

Unifying Explainability And Machine Learning: Towards Trustworthy And Plausible Explanations Without Post-Hoc Manipulations, Ian E. Nielsen

Theses and Dissertations

The deployment of machine learning (ML) in safety-critical domains is impeded by the black-box nature of deep learning models. Although these models excel at discerning complex patterns, their opacity undermines trust, limiting their use for high-stakes tasks. This thesis advances the field of eXplainable Artificial Intelligence (XAI) by introducing novel methods to evaluate and enhance model interpretability, ensuring explanations are both faithful (accurate to the model’s reasoning) and plausible (intelligible to human users). A key challenge in XAI is the unreliability of post-hoc explanation methods. To address this, we propose (1) quantitative evaluation metrics for assessing the faithfulness of local …


An Implementation Study Of A Brief, Online Sexual Mindfulness Intervention At The Individual Partner Level: The Impact Of Prompting Practice On Implementation, Alexyss Lange Jun 2025

An Implementation Study Of A Brief, Online Sexual Mindfulness Intervention At The Individual Partner Level: The Impact Of Prompting Practice On Implementation, Alexyss Lange

Theses and Dissertations

Prior research suggests frequent, scheduled, non-interactive text support enhances psychological outcomes and increases adherence to psychological interventions (Agyapong et al., 2020; Shalaby et al., 2022; Shim et al., 2017). Using a hybrid III implementation model, we recruited individuals in romantic relationships to test whether weekly reminders improved engagement with a sexual mindfulness intervention. We found no evidence that additional support increased intervention implementation. Although we aimed to assess acceptability, adoption, appropriateness, and feasibility as separate implementation outcomes, factor analysis indicated these variables cluster into two broader constructs: Readiness and motivation and discomfort and uncertainty. These factors did not differ between …


Contaminant Removal Of Printed 7xxx Aluminum Using The Additive Friction Stir Deposition Process, Jacob Jason Hansen Jun 2025

Contaminant Removal Of Printed 7xxx Aluminum Using The Additive Friction Stir Deposition Process, Jacob Jason Hansen

Theses and Dissertations

The development of contaminant-free additive friction stir deposition (AFSD) using 7xxx series aluminum alloys represents a significant advancement in solid-state additive manufacturing. The removal of graphite and other contaminants allows AFSD to more effectively move forward into the production space. This work demonstrates how contaminant-free depositions were made more feasible. This was accomplished via novel tool designs. These novel designs reduced process forces sufficiently that 7xxx aluminum alloys were able to be printed on commercial and research AFSD machines. Internal features such as draft angles and diffusers/chamfers help to significantly reduce actuator forces. This work also demonstrates how external tool …