Browsing by Subject "hardness"
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Item Comparative Study of Mechanical Properties of Aluminum Alloy A356 (Al-12Si) Fabricated by Directed Energy(2022) Shanmugam, Ragavanantham; Chandran, Jishu; Vinayagam, Mohanavel; Fakron, Osama; Dennison, Seth; Romine, SethAdditive Manufacturing technology is rapidly gaining traction in many manufacturing applications due to its process parameters control and wide range of applications. There are other AM technologies accessible, however Direct energy deposition (DED) is a critical approach in metal matrix additive manufacturing. The significant two mechanical properties tensile strength and hardness of additively created Al-12Si Aluminum alloy by DED process and pressure die casted Al-12Si components are compared in this study. The strength and modulus of the DED and PDC manufactured components were identical if the load direction in the UTM machine was the same as the construction directions, however other mechanical parameters differed slightly. Mechanical qualities of fabricated products made from reused powders were also comparable to those made from unused powder.Item Effect of Scanning Methods in the Selective Laser Melting of 316L/TiC Nanocomposites(University of Texas at Austin, 2016) AlMangour, B.; Grzesiak, D.; Yang, J.M.Selective laser melting (SLM) is a promising additive manufacturing process that allows for the fabrication of complex functional components by the selective layer-by-layer melting of particles on a powder bed using a high-energy laser beam. In this study, the SLM process was used to fabricate components of TiC/ 316L stainless steel nanocomposite using various laser scanning methods. The results showed that the laser-scanning method used for the SLM process affects the degree of densification, microstructure, and the hardness of the components produced. We believe that the alternative fabrication route presented in this study should significantly increase the use of nanocomposites.Item In-Situ TiC Particle Reinforced 316L Stainless Steel Matrix Nanocomposites: Powder Preparation by Mechanical Alloying and Selective Laser Melting Behavior(University of Texas at Austin, 2016) AlMangour, B.; Grzesiak, D.; Yang, J.M.Item Manual for Works Operators in Water Purification and Sewage Disposal Plants(University of Texas at Austin, 1930-04-08) University of Texas at AustinItem A Microstructure and Hardness Study of Functionally Graded Materials Ti6Al4V/TiC by Laser Metal Deposition(University of Texas at Austin, 2015) Zhang, Jingwei; Zhang, Yunlu; Liou, Frank; Newkirk, Joseph W.; Brown-Taminger, Karen M.; Seufzer, Walliam J.Crack free functionally graded material (FGM) Ti6Al4V-TiC has been fabricated by laser metal deposition (LMD) using TiC and Ti6Al4V powder which were premixed for different ratios. This study focuses on the influence of laser processing parameters and TiC compositional distribution on microstructure, Vickers hardness and phase. The microstructure is analyzed by scanning electron microscopy (SEM), x-ray diffraction (XRD) and hardness tests. Primary carbide, eutectic carbide and unmelted carbide are found in the deposit area. When laser power increased, the primary and secondary dendrite arm spacing increased. The laser power and scanning speed did not influence the Vickers hardness distribution significantly.