A Study Of Reduced Activation Ferritic Martensitic Metal Core Wire For Wire Arc Additive Manufacturing, 2022 Georgia Southern University
A Study Of Reduced Activation Ferritic Martensitic Metal Core Wire For Wire Arc Additive Manufacturing, Alexander L. Reichenbach
Electronic Theses and Dissertations
This study seeks to determine the technical feasibility of fabricating reduced activation ferritic martensitic (RAFM) steel parts, using a wire arc additive manufacturing (WAAM) process. The WAAM process, manufactures a part by depositing layers of metal onto a substrate to build a large scale near net shape part. RAFM alloy steels are next generation steels designed to resist radiation effects in the radiation intense working environments, such as nuclear reactors. To achieve this, process development and testing to design the WAAM production process with the custom RAFM filler wire was carried out. Several welding waveform modes were tested, and it …
Method For Reducing Warping Stresses In Torsionally Loaded I-Section Members Using Cfrp Plates, 2022 Old Dominion University
Method For Reducing Warping Stresses In Torsionally Loaded I-Section Members Using Cfrp Plates, Mamadou Konate, Zia Razzaq
Civil & Environmental Engineering Faculty Publications
This paper presents a method for reducing warping normal stresses in torsionally loaded I-section members by utilizing carbon fiber-reinforced polymer (CFRP) plates. The CFRP plates are bonded to the outer surfaces of the flanges with a view to reducing warping normal stresses. The maximum warping normal stress in the flanges of a steel I-shaped member without the CFRP plates is compared to those obtained with the CFRP plates having various thicknesses. It has been found that the use of CFRP plates bonded to both flanges of the I-section result in a substantial reduction of the warping stresses. For the study …
Study Of The Thermodynamic Properties Absorbation Sulfur Storage Gas Of Zinc And Copper Industry, 2021 Tashkent State Technical University named after Islam Karimov
Study Of The Thermodynamic Properties Absorbation Sulfur Storage Gas Of Zinc And Copper Industry, Berdiyarov Tilovkabulovich Berdiyarov Dr., Sh. T. Khojiev, S. T. Matkarimov, Sh. Munosibov
Technical science and innovation
The article considers the problems of utilization of industrial gases formed in the production of copper and ore containing sulfur anhydrides. Currently, the composition of process gases entering the gas purification department is approximately 6-7% SO2, 0.2-0.3% SO3 and other gases, until sulfuric acid is obtained from these gases, the sulfate is treated in a counter-scheme with 8% sulfate acid. The aim is to first reduce the temperature of the exhaust gases and second to avoid flying components such as as As, F, Se. As a result of the studies, the amount of SO2 in the …
Study Of Alloy And Process Modifications To Design Hydrogen Resilient High Hardness Steels, 2021 Mississippi State University
Study Of Alloy And Process Modifications To Design Hydrogen Resilient High Hardness Steels, William R. Williams
Theses and Dissertations
High hardness steels (HHS) are vulnerable to hydrogen embrittlement, which can lead to rapid degradation of mechanical properties. Improved resistance to hydrogen embrittlement would be beneficial to many industries including construction, automotive, and military. A comparison study was performed to assess the hydrogen susceptibility of select commercially available and in-house designed HHS alloys. Slow strain rate tensile tests, performed with specimens charged with various levels of hydrogen, provided a macroscopic view of the onset of hydrogen embrittlement. Hydrogen permeation and thermal desorption spectroscopy tests determined the uptake and diffusivity of hydrogen through the material. The evaluation of hydrogen susceptibility for …
The Process-Structure-Property-Performance Of Aisi 1020, 2021 Mississippi State University
The Process-Structure-Property-Performance Of Aisi 1020, Jonathan Wellman, Tate James, Robbie Christman, Brian Broom
ME 4133/6133 Mechanical Metallurgy
AISI 1020 is widely used in many different industries due to its high strength, high ductility, high machinability, and good weldability. AISI 1020 has a number of applications. Low carbon steel can be used on a macroscale to build bridges, and low carbon steel can be used on smaller scales such as Lawnmower blades. Low carbon steel is the material of choice for lawn mower blades because of its ability to bend before it breaks. The ductile attribute of low carbon steel also has many other benefits.
Ti-6al-7nb Utilization In Surgical Implants, 2021 Mississippi State University
Ti-6al-7nb Utilization In Surgical Implants, Michael O. Fleming
ME 4133/6133 Mechanical Metallurgy
This presentation discusses the processing, structure, properties, and performance of Ti-6Al-7Nb in relation to use as a surgical implant.
Development Of Pspp Map For Stainless Steel Alloys Used In A Marine Environment, 2021 Mississippi State University
Development Of Pspp Map For Stainless Steel Alloys Used In A Marine Environment, Jarrett D. Hawkins
ME 4133/6133 Mechanical Metallurgy
A process-structure-properties-performance map will be created for these alloys focusing on the modification of the structure or composition and outlining the processes required and the affected properties. A thorough review of different chemical alloys, grain refining methods, and grain boundary compositions for several alloys and their corresponding property effects. Also plan to review material treatment processes and standard refining methods for stainless steels. The performance of these metals will be evaluated for property requirements in regards to strength, toughness, with an emphasis on corrosion resistance.
Tungsten: The Strongest Natural Metal On Earth, 2021 Mississippi State University
Tungsten: The Strongest Natural Metal On Earth, Haley E. Holland, Razan Khadka, Lee Marble, Kaleb Tutor
ME 4133/6133 Mechanical Metallurgy
The overall objective of this project was to construct a process-structure-property-performance (PSPP) map for a chosen metallic material. The material chosen by the group is tungsten (W). Tungsten is a rare, naturally occurring element and is usually found in the form of ores. It is known predominantly for its ability to withstand extreme temperatures, as well as its high tensile strength. The PSPP map displays many specifications of tungsten in each of the four categories and further details regarding each specific linkage, or subcategory, within the map are written throughout the research paper.
Along with the four specific categories outlined …
Analysis Of Titanium Alloy Ti-6al-4v, 2021 Mississippi State University
Analysis Of Titanium Alloy Ti-6al-4v, Hunter C. Smith, Gordin Smith
ME 4133/6133 Mechanical Metallurgy
Titanium alloy Ti-6Al-4V was chosen for examination, more specifically, the Properties and Performance of the alloy. The students will share the responsibility of examining the attributes of the material. The team members participate evenly in performing research, producing calculations, and constructing the final report. Contained herein is the information gathered through research conducted thus far.
The performance of the material will be related to the processing methods of the material. This relationship forms the basis of cost analysis. The students will examine the atomic characteristics and crystalline structure to determine the effects of the alloyed materials on properties such as …
An Analysis Of The Effects Of Process, Structure, And Properties On The Performance Of The Ti6al4v Alloy, 2021 Mississippi State University
An Analysis Of The Effects Of Process, Structure, And Properties On The Performance Of The Ti6al4v Alloy, Brad Jay Sampson, Loubna Ifqir
ME 4133/6133 Mechanical Metallurgy
Ti6Al4V (pronounced Ti-64), is a titanium alloy used in a variety of engineering applications including the aerospace, automotive, and biomedical industries. Ti6Al4V is made up of a combined ɑ-β microstructure, which provides it with many valuable properties such as high strength, low weight, high melting point, corrosion resistance, and biocompatibility. [1] For years, casting and forging have been the traditional processes used for the manufacturing of Ti6Al4V components, but recent interest in the additive manufacturing of Ti6Al4V through the Electron Beam Melting (EBM), Selective Laser Melting (SLM), and Directed Energy Deposition (DED) methods has been gained. The goal of this …
Al 6061 Alloy, 2021 Mississippi State University
Al 6061 Alloy, Will Mckelvey, Evan Robertson, Justin Yates
ME 4133/6133 Mechanical Metallurgy
We want to portray the Al 6061 manufacturing and machining processes and how these affect the mechanical properties of the material. We also want to portray the strength and weaknesses and the reasons why it is used in certain applications.
Duplex Stainless Steel 2205 In The Pulp And Paper Industry, 2021 Mississippi State University
Duplex Stainless Steel 2205 In The Pulp And Paper Industry, Charlie S. Wilcher, Trevor Davus
ME 4133/6133 Mechanical Metallurgy
Duplex stainless steel’s durability, formability, and resistance to corrosion make it the primary steel option of the pulp and paper industry. The harsh environments found in certain aspects of this industry, such as in bleach plants, digesters, liquor vessels, and any piping where corrosive liquids may be passed, require the previously mentioned properties that duplex stainless steel 2205 offer. The structure and properties of duplex stainless steel, as well as the processes it undergoes, allow for it to withstand these environments. Research into the structure and properties of duplex stainless steel and the processes it undergoes will indicate how duplex …
Ar400 Wear Plates, 2021 Mississippi State University
Ar400 Wear Plates, Jase Tatum, Bryson Miller, John Howell, Aaron Alexander
ME 4133/6133 Mechanical Metallurgy
Wear resistance is an invaluable performance metric for most metallic components found in mechanical systems. Our research focused on AR400, a steel alloy known for its wear resistance capabilities, in an effort to determine what factors might be attributed to its performance in wear applications. After establishing the processing techniques and resulting material structures that give AR400 such an edge in extreme wear conditions, our goal is to determine indicators of wear resistance that can be used to distinguish excellent wear resistant alloys from average or subpar performers against wear.
Investigating Cobalt Chrome Alloy For Use In Biomedical Applications, 2021 Mississippi State University
Investigating Cobalt Chrome Alloy For Use In Biomedical Applications, Morgan Calhoun, Caitlin Cade
ME 4133/6133 Mechanical Metallurgy
Cobalt Chrome alloys, in particular cast Co-Cr ASTM-F75, are often used as the material for medical implants due to a combination of material properties: high strength, stiffness, temperature endurance, and wear / corrosion resistance. We aim to demonstrate and discuss what characteristics make it such a desirable material in the production of metallic biomedical implants
Titanium Ti-6al-4v, 2021 Mississippi State University
Titanium Ti-6al-4v, James Aaras Ross Brundege
ME 4133/6133 Mechanical Metallurgy
Titanium alloys, such as Ti-6A1-4V, used as biomaterials possess great characteristics compared to other alloys such as stainless steel alloys. Characteristics such as biocompatibility, enhanced corrosion, strain, and fatigue resistance provide amazing benefits from these alloys. Providing an understanding of Ti used in biomedical applications and production can provide insight into its benefits and limitations as well as the areas of potential improvement for future study.
3xx Aluminum Alloys For Ice Implementation, 2021 Mississippi State University
3xx Aluminum Alloys For Ice Implementation, Kyle A. Taylor, Eric Cleckner, Jeffery Garrett
ME 4133/6133 Mechanical Metallurgy
The material to be explored for the purpose of this project relates to the Aluminum alloys used in the majority of modern engine “heads” and a number of engine “blocks”. The Aluminum used for these engine applications vary slightly across different manufacturers in their processing, structure and ultimate properties, despite their nearly identical performance applications. Part of the interest in this particular subject is the slight variations across manufacturing that result in different performance. Regardless of idiosyncrasies, these Al alloys are expected to perform under varying temperatures, with the ability to elastically deform and return to their original shape. They …
Fundamentals Of Cavity Formation In Α-Fe And Fe-Cr Alloys, 2021 University of Tennessee, Knoxville
Fundamentals Of Cavity Formation In Α-Fe And Fe-Cr Alloys, Yan-Ru Lin
Doctoral Dissertations
Ferritic-martensitic steels are attractive candidate materials for fusion and advanced fission reactors primarily due to their low swelling characteristic, attractive thermo-mechanical properties, and the potential for development of nanostructured ferritic alloys. However, significant discrepancies exist regarding the effect of solutes and irradiation temperature on cavity swelling under ion versus neutron irradiation conditions. Several mechanisms have been proposed that may affect cavity swelling, but no general theory or model has received complete acceptance to explain these phenomena.
To better understand the formation of cavities in ferritic steels, we have performed multi-temperature (400-550°C) single-beam and simultaneous dual-beam irradiations (ex-situ and in-situ) on …
Assessing Mechanical Performance Of Dissimilar Steel Systems Made Via Wire-Arc Additive Manufacturing, 2021 University of Tennessee, Knoxville
Assessing Mechanical Performance Of Dissimilar Steel Systems Made Via Wire-Arc Additive Manufacturing, Obed Daniel Acevedo
Masters Theses
Hot stamping is part of a specific type of metalworking procedure widely used in the automotive industry. This research seeks to help make hot stamp tooling component production more cost-effective by using large-scale additive manufacturing. Additive manufacturing can produce dissimilar steel components that can be more cost-effective and time-efficient and allow for complex geometries to be made. A dissimilar steel system consisting of 410 martensitic stainless steel and AWS ER70S-6 mild steel is proposed to make hot stamps, making them more cost-efficient. However, the material interface's mechanical behavior in 410SS-mild steel additively manufactured material systems is not well understood. This …
Stochastic Lightning Damage Prediction Of Carbon/Epoxy Composites With Material Uncertainties, 2021 Universiti Teknologi Petronas
Stochastic Lightning Damage Prediction Of Carbon/Epoxy Composites With Material Uncertainties, S.Z.H. Shah, Juhyeong Lee
Mechanical and Aerospace Engineering Faculty Publications
This study presents a novel stochastic modeling framework predicting lightning thermal damage in carbon/epoxy composites. The stochastic lightning damage model (SLDM) was developed with random distributions of composite’s electrical conductivity and void. The Box-Muller transformation was applied to generate random in-plane and through-thickness electrical conductivities with Gaussian distributions. The SLDM suggested that the predicted lightning thermal damage to carbon/epoxy composites increased slightly with the use of stochastic electrical conductivity, but the presence of voids did not significantly affect the damage development. The predicted size and shape of lightning thermal damage agreed fairly well with experimental results. In addition, the proposed …
Laser Surface Treatment And Laser Powder Bed Fusion Additive Manufacturing Study Using Custom Designed 3d Printer And The Application Of Machine Learning In Materials Science, 2021 Louisiana State University
Laser Surface Treatment And Laser Powder Bed Fusion Additive Manufacturing Study Using Custom Designed 3d Printer And The Application Of Machine Learning In Materials Science, Hao Wen
LSU Doctoral Dissertations
Selective Laser Melting (SLM) is a laser powder bed fusion (L-PBF) based additive manufacturing (AM) method, which uses a laser beam to melt the selected areas of the metal powder bed. A customized SLM 3D printer that can handle a small quantity of metal powders was built in the lab to achieve versatile research purposes. The hardware design, electrical diagrams, and software functions are introduced in Chapter 2. Several laser surface engineering and SLM experiments were conducted using this customized machine which showed the functionality of the machine and some prospective fields that this machine can be utilized. Chapter 3 …