Materials Science and Engineering Commons^™

A Strong And Ductile Cobalt-Free Solid-Solution Fe30ni30mn30cr10 Multi-Principal Element Alloy From Hot Rolling, Hans Pommerenke, Jiaqi Duan, Nathan Curtis, Victor Delibera, Adam Bratten, Andrew Hoffman, Mario F. Buchely, Ronald J. O'Malley, Haiming Wen

Materials Science and Engineering Faculty Research & Creative Works

Most of the Face-Centered Cubic (FCC) Multi-Principal Element Alloys (MPEAs) Developed Thus Far Contain Cobalt. for Many Applications, it is Either required or Beneficial to Avoid Cobalt, Since Cobalt Has Long-Term Activation Issue (For Nuclear Applications), is Expensive, and is Considered a Critical Material. in Addition, FCC Structured Solid-Solution MPEAs Tend to Have Relatively Low Strength. a FCC Solid-Solution Fe30Ni30Mn30Cr10 (At %) MPEA Was Fabricated Via Arc Melting, Followed by Homogenization at 1100 °C for 12 H. the Alloy Was Hot Rolled at 1100 °C with a Total Reduction of Up to 97 %. the Microstructure Was Characterized and Mechanical …

Additive Manufacturing Of Stretchable Strain Sensors: Fabrication, Optimization And Application, John Nady Shihat Bastawrous

Theses and Dissertations

In this project, a novel strain sensor design is fabricated employing different additive manufacturing techniques. The spring sensor's primary material is PLA-Like resin with a nanocomposite encapsulation layer as the functional material. The main principle of Straining the sensors results in a change in resistivity as the distances among the conductive carbon particles change according to the strain applied.

Sensor fabrication consists of two parts: spring manufacturing and development of nanocomposite encapsulation The nanocomposite matrix is developed through the dispersion of Graphene and Carbon nanotubes in Thermoplastic Polyurethane through sonication and magnetic hotplate stirring. While the spring itself is manufactured …

Dissolution Rates Of Borophosphate Glasses In Deionized Water And In Simulated Body Fluid, Parker T. Freudenberger, Rebekah L. Blatt, Richard K. Brow

Materials Science and Engineering Faculty Research & Creative Works

Particles of Borophosphate Glasses with the Nominal Molar Compositions 16Na₂O-(24-Y)CaO-YSrO-XB₂O₃-(60-X)P₂O₅ (Mol%), Where 0 ≤ X ≤ 60 and Y = 0, 12, and 24, Were Reacted in Deionized Water and in Simulated Body Fluid (SBF) at 37 °C. for the Dissolution Experiments in Water, the PH of the Solution at the Conclusion of the Experiments Increased Systematically, from 2.1 to 9.5, for Y = 0 Glasses When 'x' Increased from 0 to 60. the Reaction Rates over the First 8–24 H of Dissolution in Both SBF and Deionized Water Followed Linear …

Mechanical Testing Data From Neutron Irradiations Of Pm-Hip And Conventionally Manufactured Nuclear Structural Alloys, Yaqiao Wu

Materials Science and Engineering Faculty Publications and Presentations

This article presents the comprehensive mechanical testing data archive from a neutron irradiation campaign of nuclear structural alloys fabricated by powder metallurgy with hot isostatic pressing (PM-HIP). The irradiation campaign was designed to facilitate a direct comparison of PM-HIP to conventional casting or forging. Five common nuclear structural alloys were included in the campaign: 316L stainless steel, SA508 pressure vessel steel, Grade 91 ferritic steel, and Ni-base alloys 625 and 690. Irradiations were carried out in the Advanced Test Reactor (ATR) at Idaho National Laboratory (INL) to target doses of 1 and 3 displacements per atom (dpa) at target temperatures …

A Prediction Of Young's Modulus For Tin Containing Phosphate Glasses Using Quantitative Structural Information, Tatsuki Shimizu, Akira Saitoh, Uwe Hoppe, Grégory Tricot, Richard K. Brow

Materials Science and Engineering Faculty Research & Creative Works

A Rigid Unit Packing Fraction (RUPF) Model Was Used to Better Understand the Influence of Local Structural Units on the Young's Elastic Modulus (E) of Binary and Ternary Tin Phosphate Glasses. Quantitative Analyses of the Units that Constitute the Glass Structure, Obtained from X-Ray/neutron Diffraction and 31P MAS-NMR Spectroscopy, Were Used to Calculate Polyhedral Packing Fractions that, with Tabulated Bond Dissociation Energies, Were Used to Predict E based on a Modification of the Makashima-Mackenzie Relationship, Which Uses Ion Sizes to Calculate Packing Fractions. Predictions based on the RUPF Model Are Better Than Those based on Ion Sizes, and Extending the …

Polymer Based Energy Storage And Thermal Management On Textile Devices, Wesley A. Viola

Doctoral Dissertations

Humans developed textiles to manage thermal energy transfer with the environment and support homeostasis in a wide range of climates. With the anticipation of wearable technologies to transform healthcare via early, pre-symptomatic detection of illness, there is now a demand for electrical energy storage to support such on-body devices. Finding energy materials to merge seamlessly with textiles is basic requirement to ensure widespread adoption of wearable health monitors.

Here we use a vapor deposition process to conformally coat ordinary fabrics with the doped conjugated polymer poly(3,4 ethylenedioxythiophene) (PEDOT-Cl), a soft material which possesses electronic and redox capabilities. We demonstrate PEDOT-Cl …

Welding 3d Printed Structures For Composite Sacrificial Tooling, Dominic L. Perez, Kyle Gerold, Matt K. Ficker, Matthew D. Wooden, Aidan M. Dungy, Brennan G. Coit

Research & Creative Achievement Day

3D printed parts offer the ability to generate dimensioned, complex objects with minimal machining touch time and skill, but they are typically very weak and limited in size. Strong and light composite parts require tooling to be created for the fabric to lay on while the resin is curing, but tooling can be quite expensive during the prototyping phase or for low part quantity runs. This study examined the techniques required to weld smaller 3D printed parts together to form large 3D printed tools that could be used as a sacrificial tool for a composite part. In this method, the …

Carbon Cornhole, Justin O. Dailey, Blake M. Endle, Joshua J. Lebrun, Bailey J. Banaszynski, Josiah M. Gleisner

Research & Creative Achievement Day

The purpose of this design project is to create a durable lightweight yard game for players of all skill levels. Carbon Cornhole is a composite improvement on the already popular yard game, cornhole, with a new twist. The final product is based on valued feedback from customers. The board is manufactured of carbon fiber/epoxy sandwich panels with a closed cell foam core. The composite design provides a lightweight product. The panels are specifically manufactured to retain their mechanical properties when exposed to outdoor elements such as water and UV radiation. The addition of inlayed LED lights and two new "skill …

Flexural Creep Comparison To Tts Creep For Pp And Pp-Gf30, Max R. Kauphusman, Regan G. Harvey

Research & Creative Achievement Day

Creep testing is one of the most expensive datasets to acquire in both cost ($10k+) and time (2+ months). Dynamic Mechanical Analysis offers a unique opportunity to characterize creep properties of polymers using a technique called Time Temperature Super Positioning (TTSP) in a relatively short period of time. TTSP works by holding either frequency or loading constant at set temperatures for a constant period of time. WLF equations are then used to combine multiple curves from different temperatures into a master curve that can be used to extrapolate out creep performance at designated reference temperatures and save a considerable amount …

Modifying Barium Hexaferrite Magnets By Adding Sol-Gel Synthesized Cobalt Ferrite Phase, Thanida Charoensuk, Wannisa Thongsamrit, Anuchit Hunyek, Komkrich Chokprasombat, Pongsakorn Jantaratana, Chitnarong Sirisathitkul

Karbala International Journal of Modern Science

Combining various types of ferrites brings about magnetic properties desirable for different applications. This study aims to modify barium hexaferrite (BaFe₁₂O₁₉) by physically mixing it with cobalt ferrite (CoFe₂O₄). BaFe₁₂O₁₉/CoFe₂O₄ magnets were produced by ball-milling and pressing sol-gel-derived ferrite powders. The ferrite composites showed variations in magnetic properties from BaFe₁₂O₁₉ magnets with a saturation magnetization of 69.46 emu/g and a maximum energy product of 0.4529 MGOe. For the BaFe₁₂O₁₉:CoFe₂O₄ weight ratio of 4:1, both satura-tion …

A High-Strength Precipitation Hardened Cobalt-Free High-Entropy Alloy, Matthew Luebbe, Jiaqi Duan, Fan Zhang, Jonathan Poplawsky, Hans Pommeranke, Maalavan Arivu, Andrew Hoffman, Mario F. Buchely, Haiming Wen

Materials Science and Engineering Faculty Research & Creative Works

Recent Studies on Precipitation-Hardened High-Entropy Alloys (HEAs) Demonstrate their High Strength and Thermal Stability, Making Them Promising Materials for High-Temperature Structural Applications Such as Nuclear Reactors. However, Many Existing HEAs Contain Cobalt (Co), Which is Unsuitable for Nuclear Applications Because of the Long-Term Activation Issue of Co. Co is Also Expensive and Considered a Critical Material for Other Applications. Therefore, It is Desired to Exclude Co from the Composition. a Co-Free (Fe_0.3Ni_0.3Mn_0.3Cr_0.1)88Ti₄Al₈ HEA Was Developed and Studied in This Work. in Contrast to Previous Co-Free HEAs, This Alloy is …

Development Of Novel Electrodes And Electrolytes For Safer Aqueous Ammonium Ion Batteries With Enhanced Performance., Shelton Farai Kuchena

LSU Doctoral Dissertations

The Lithium-ion battery (LIBs) system has dominated the battery market because of its superior energy and power density. Problems related to LIBs such as safety, scarcity of cobalt and lithium have led researchers to explore alternative battery systems. NH₄⁺ ion is a nonmetal charge carrier with lower molar mass (18 mol g^-1) and smaller hydrated ionic size (3.31 Å) which results in excellent electrochemical properties. Furthermore, NH₄⁺ ion has a tetrahedral structure that has no preferred orientation as compared to spherical metal ions giving a different intercalation chemistry based on hydrogen bonding. These properties …

Corrosion Case Study On Automobile, Grace Ajayi, Xinran Pan, Geethu Sasikala, Marshall S. Yang

Chemistry Publications

No abstract provided.

Deposition, Material Characterization, And Mechanical Testing Of Cr Containing Diamond-Like Carbon Films, Nicholas Anderson

LSU Master's Theses

A series of amorphous hydrogenated chromium containing diamond-like carbon films were deposited on 316 stainless steel substrates with a chromium interlayer through inductively coupled plasma assisted direct current magnetron sputtering. Details on the deposition process of these films are discussed. The film is characterized using scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, energy dispersive spectroscopy, and transmission electron microscopy. The coating hardness and indentation modulus is measured by instrumented nanoindentation. The coefficient of friction and the upper bound of the coating wear coefficient is measured using the pin-on-disk method. The fracture toughness of the diamond-like carbon film and a …

Effect Of Chemical Identity And Morphology On Amphiphilic-Zwitterionic Block Copolymer Membranes

Doctoral Dissertations

Amphiphilic block copolymers have gained a broad research interest attributed to their self-assembly properties over a range of pH, temperature, and ionic strength. Polyzwitterions have attracted special attention due to their hydrophilicity, charge sensitivity and coulombic attraction of the opposite charges over a range of environments making them a popular material of study in the field of stimuli responsive systems, for example in self-healing hydrogels, and water transport membranes. Combining the stimuli responsiveness and higher hydrophilicity of zwitterionic polymers with self-assembly behavior of amphiphilic block copolymers created an interest to study the effect of composition and identity of the zwitterionic …

Structure-Function Relationships Of Bighorn Sheep Horncore Bone And Horn-Horncore Interface Materials For Energy Absorption Applications

Doctoral Dissertations

Bighorn sheep rams do not show overt signs of traumatic brain injury from head impacts experienced during intraspecific combat. Rams’ cranial appendages bear the brunt of ramming impacts and are composed of a keratin-rich horn anchored to a bony horncore via a soft connective tissue interface. The horncore is filled with velar bone which has a unique porous architecture with a comparable bone volume fraction, but larger strut thickness and separation than typical mammalian trabecular bone. Velar bone absorbs more energy than the horn and substantially reduces post-impact brain cavity accelerations in computational models of bighorn sheep ramming. These findings …

Correlation Between Laboratory Testing Results And In-Situ Sidewalk Scaling, Brian R. Shea

Masters Theses

Scaling tests aim to induce scaling behavior in concrete specimens similar to environmental conditions. The efficacy of laboratory tests’ ability to match environmental conditions is important to be able to evaluate the durability of concrete exposed to freeze-thaw cycles and de-icers. This study attempts to correlate results between two existing scaling test standards, ASTM C672 and the BNQ NQ 2621-900. The correlation is done via scaling evaluation including computer-based photogrammetric analysis, visual ratings, and cumulative mass loss measurements. Then a correlation between the laboratory testing and in-situ sidewalk panel specimens is made via visual ratings.

Optimization Of Acrylonitrile Butadiene Styrene Filament 3d Printing Process Parameters Based On Mechanical Test, Raja S, Rajeswari N

International Journal of Mechanical and Industrial Engineering

This research paper's main goal is to improve the printing parameters that can be used in the 3D Printing Material Extrusion production method in order to get the best printing parameters for Acrylonitrile Butadiene Styrene (ABS) filament with the tensile test in the shortest possible time. The printing parameters that can be employed on 3D printing material extrusion machines include the extruder temperature, layer height, printing speed, and shell count. Also, tensile specimens in accordance with the ASTM (American Society for Testing and Materials) D638 standard were created utilizing ABS filament and the aforementioned adjusted printing settings. The most effective …

History Of The Metallurgy / Mineral Processing Programs (1900-2022), Jerome Downey, Larry G. Twidwell

Metallurgy

No abstract provided.

Timeline - History Of The Metallurgy / Mineral Processing Programs (1900-2022), Jerome Downey, Larry G. Twidwell

Metallurgy

No abstract provided.