Search Results - "Dehoff, Ryan"

Effects of heat treatments on microstructure and properties of Ti-6Al-4V ELI alloy fabricated by electron beam melting (EBM) by Galarraga, Haize, Warren, Robert J., Lados, Diana A., Dehoff, Ryan R., Kirka, Michael M., Nandwana, Peeyush

“…Electron beam melting (EBM) is a metal powder bed fusion additive manufacturing (AM) technology that is used to fabricate three-dimensional near-net-shaped…”
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Localized melt-scan strategy for site specific control of grain size and primary dendrite arm spacing in electron beam additive manufacturing by Raghavan, Narendran, Simunovic, Srdjan, Dehoff, Ryan, Plotkowski, Alex, Turner, John, Kirka, Michael, Babu, Suresh

“…In addition to design geometry, surface roughness, and solid-state phase transformation, solidification microstructure plays a crucial role in controlling the…”
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Mechanical behavior of post-processed Inconel 718 manufactured through the electron beam melting process by Kirka, Michael M., Medina, Frank, Dehoff, Ryan, Okello, Alfred

“…The electron beam melting (EBM) process was used to fabricate Inconel 718. The microstructure and tensile properties were characterized in both the…”
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Numerical modeling of heat-transfer and the influence of process parameters on tailoring the grain morphology of IN718 in electron beam additive manufacturing by Raghavan, Narendran, Dehoff, Ryan, Pannala, Sreekanth, Simunovic, Srdjan, Kirka, Michael, Turner, John, Carlson, Neil, Babu, Sudarsanam S.

“…The fabrication of 3-D parts from CAD models by additive manufacturing (AM) is a disruptive technology that is transforming the metal manufacturing industry…”
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A review on the fatigue behavior of Ti-6Al-4V fabricated by electron beam melting additive manufacturing by Chern, Andrew H., Nandwana, Peeyush, Yuan, Tao, Kirka, Michael M., Dehoff, Ryan R., Liaw, Peter K., Duty, Chad E.

“…•As-fabricated horizontally orientated parts show greater fatigue life than vertical.•Machining improves overall fatigue life and reduces anisotropic fatigue…”
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A defect-resistant Co–Ni superalloy for 3D printing by Murray, Sean P., Pusch, Kira M., Polonsky, Andrew T., Torbet, Chris J., Seward, Gareth G. E., Zhou, Ning, Forsik, Stéphane A. J., Nandwana, Peeyush, Kirka, Michael M., Dehoff, Ryan R., Slye, William E., Pollock, Tresa M.

“…Additive manufacturing promises a major transformation of the production of high economic value metallic materials, enabling innovative, geometrically complex…”
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Fatigue crack growth mechanisms at the microstructure scale in as-fabricated and heat treated Ti-6Al-4V ELI manufactured by electron beam melting (EBM) by Galarraga, Haize, Warren, Robert J., Lados, Diana A., Dehoff, Ryan R., Kirka, Michael M.

“…•The FCG behavior of as-fabricated and β annealed EBM Ti-6Al-4V ELI is examined.•FCG threshold (ΔKth) mechanisms and models are established for all…”
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Microstructure evolution during laser direct energy deposition of a novel Fe-Cr-Ni-W-B hardfacing coating by Sridharan, Niyanth, Cakmak, Ercan, Dehoff, Ryan R.

“…The paper presents a detailed study on the microstructure evolution and cracking tendency of a novel Fe-Cr-Ni-Mo-W-B hard facing alloy deposited on a carbon…”
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Thermal effects on microstructural heterogeneity of Inconel 718 materials fabricated by electron beam melting by Sames, William J., Unocic, Kinga A., Dehoff, Ryan R., Lolla, Tapasvi, Babu, Sudarsanam S.

“…Additive manufacturing technologies, also known as 3D printing, have demonstrated the potential to fabricate complex geometrical components, but the resulting…”
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On the toughness scatter in low alloy C-Mn steel samples fabricated using wire arc additive manufacturing by Sridharan, Niyanth, Noakes, Mark W., Nycz, Andrzej, Love, Lonnie J., Dehoff, Ryan R., Babu, Sudarsanam S.

“…Low alloy carbon manganese (C-Mn) steel builds were fabricated using a wire based additive manufacturing system developed at Oak Ridge National Laboratory…”
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Build orientation, surface roughness, and scan path influence on the microstructure, mechanical properties, and flexural fatigue behavior of Ti–6Al–4V fabricated by electron beam melting by Chern, Andrew H., Nandwana, Peeyush, McDaniels, Robert, Dehoff, Ryan R., Liaw, Peter K., Tryon, Robert, Duty, Chad E.

“…In the present work, microstructure and fatigue behavior of Electron Beam Melted (EBM) Ti–6Al–4V have been systematically studied. Fatigue behavior was…”
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Recyclability Study on Inconel 718 and Ti-6Al-4V Powders for Use in Electron Beam Melting by Nandwana, Peeyush, Peter, William H., Dehoff, Ryan R., Lowe, Larry E., Kirka, Michael M., Medina, Francisco, Babu, Sudarsanam S.

“…Powder bed-based additive manufacturing technologies offer a big advantage in terms of reusability of the powders over multiple cycles that result in cost…”
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Self-organized amorphous TiO2 nanotube arrays on porous Ti foam for rechargeable lithium and sodium ion batteries by Bi, Zhonghe, Paranthaman, M. Parans, Menchhofer, Paul A., Dehoff, Ryan R., Bridges, Craig A., Chi, Miaofang, Guo, Bingkun, Sun, Xiao-Guang, Dai, Sheng

“…Self-organized amorphous TiO2 nanotube arrays (NTAs) were successfully fabricated on both Ti foil and porous Ti foam through electrochemical anodization…”
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Microstructural evolution and strengthening mechanisms in a heat-treated additively manufactured Al–Cu–Mn–Zr alloy by Michi, Richard A., Sisco, Kevin, Bahl, Sumit, Allard, Lawrence F., Wagner, Karla B., Poplawsky, Jonathan D., Leonard, Donovan N., Dehoff, Ryan R., Plotkowski, Alex, Shyam, Amit

“…The microstructural and strength evolution of an additively manufactured Al-8.6Cu-0.5Mn-0.9Zr alloy upon aging at 300, 350, and 400 °C is investigated. The…”
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Processing of tungsten through electron beam melting by Ellis, Elizabeth A.I., Sprayberry, Michael A., Ledford, Christopher, Hankwitz, Jameson P., Kirka, Michael M., Rock, Chris D., Horn, Timothy J., Katoh, Yutai, Dehoff, Ryan R.

“…Additive manufacturing (AM) presents a new design paradigm for the manufacture of engineering materials through the layer-by-layer approach combined with…”
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Correlations Between Powder Feedstock Quality, In Situ Porosity Detection, and Fatigue Behavior of Ti-6Al-4V Fabricated by Powder Bed Electron Beam Melting: A Step Towards Qualification by Nandwana, Peeyush, Kirka, Michael M., Paquit, Vincent C., Yoder, Sean, Dehoff, Ryan R.

“…Ti-6Al-4V is the most studied alloy via electron beam melting (EBM) with regards to microstructure and mechanical behavior, but there have been no attempts to…”
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Additive manufacturing of liquid/gas diffusion layers for low-cost and high-efficiency hydrogen production by Mo, Jingke, Dehoff, Ryan R., Peter, William H., Toops, Todd J., Green, Johney B., Zhang, Feng-Yuan

“…A low-cost additive manufacturing technology, electron beam melting (EBM), is employed for the first time to fabricate titanium liquid/gas diffusion media with…”
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Microstructural and micromechanical characterization of IN718 theta shaped specimens built with electron beam melting by Cakmak, Ercan, Kirka, Michael M., Watkins, Thomas R., Cooper, Ryan C., An, Ke, Choo, Hahn, Wu, Wei, Dehoff, Ryan R., Babu, Sudarsanam S.

“…Theta-shaped specimens were additively manufactured out of Inconel 718 powders using an electron beam melting technique, as a model complex load bearing…”
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Post-processing to Modify the α Phase Micro-Texture and β Phase Grain Morphology in Ti-6Al-4V Fabricated by Powder Bed Electron Beam Melting by Nandwana, Peeyush, Lee, Yousub, Ranger, Chasen, Rollett, Anthony D., Dehoff, Ryan R., Babu, Sudarsanam S.

“…Additively manufactured Ti-6Al-4V has columnar β grains along the build direction with a 〈001〉 fiber texture. Because of Burgers Orientation Relationship, the…”
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Nucleation and growth of chimney pores during electron-beam additive manufacturing by Cordero, Zachary C., Dinwiddie, Ralph B., Immel, David, Dehoff, Ryan R.

“…The nucleation and growth of chimney pores during powder-bed electron-beam additive manufacturing is investigated using in situ infrared thermography and…”
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