Search Results - "Kirka, Michael"

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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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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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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Creep anisotropy modeling and uncertainty quantification of an additively manufactured Ni-based superalloy by Fernandez-Zelaia, Patxi, Lee, Yousub, Dryepondt, Sebastien, Kirka, Michael M.

“…The advantages offered by additive manufacturing over traditional processes has driven a great deal of industrial and academic interest in recent years…”
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Fatigue crack growth resistance of a mesoscale composite microstructure Haynes 282 fabricated via electron beam melting additive manufacturing by Fernandez-Zelaia, Patxi, Rojas, Julio Ortega, Ferguson, James, Dryepondt, Sebastien, Kirka, Michael M.

“…Materials synthesis via additive manufacturing gives unprecedented control over the solidified microstructure. While a number of studies have demonstrated the…”
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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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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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LPBF Processability of NiTiHf Alloys: Systematic Modeling and Single-Track Studies by Dabbaghi, Hediyeh, Pourshams, Mohammad, Nematollahi, Mohammadreza, Poorganji, Behrang, Kirka, Michael M, Smith, Scott, Chinnasamy, Chins, Elahinia, Mohammad

“…Research into the processability of NiTiHf high-temperature shape memory alloys (HTSMAs) via laser powder bed fusion (LPBF) is limited; nevertheless, these…”
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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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Influence of geometry on columnar to equiaxed transition during electron beam powder bed fusion of IN718 by Raghavan, Narendran, Stump, Benjamin C., Fernandez-Zelaia, Patxi, Kirka, Michael M., Simunovic, Srdjan

“…Correlation between spot-melt scan parameters (linear spot-density aka areal energy density), build geometry, and solidification microstructure evolution…”
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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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Mitigation of scan strategy effects and material anisotropy through supersolvus annealing in LPBF IN718 by Newell, David J., O'Hara, Ryan P., Cobb, Gregory R., Palazotto, Anthony N., Kirka, Michael M., Burggraf, Larry W., Hess, Joshuah A.

“…The nickel-based superalloy Inconel 718 (IN718) is an excellent candidate among the existing aerospace alloys for laser powder bed fusion (LPBF) manufacturing…”
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Outlook on texture evolution in additively manufactured stainless steels: Prospects for hydrogen embrittlement resistance, overview of mechanical, and solidification behavior by Thapliyal, Saket, Cheng, Jiahao, Mayeur, Jason, Yamamoto, Yukinori, Fernandez-Zelaia, Patxi, Nycz, Andrzej, Kirka, Michael M.

“…Realizing application specific manufacture with fusion-based additive manufacturing (F-BAM) processes requires understanding of the physical phenomena that…”
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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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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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Additive Manufacturing of Pure Mo and Mo + TiC MMC Alloy by Electron Beam Powder Bed Fusion by Rock, Christopher, Lara-Curzio, Edgar, Ellis, Betsy, Ledford, Christopher, Leonard, Donovan N., Kannan, Rangasayee, Kirka, Michael, Horn, Timothy

“…A metal matrix composite powder of molybdenum (Mo) + TiC was produced by mechanical alloying (MA) and used in additive manufacturing by electron beam powder…”
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Geometry-Induced Spatial Variation of Microstructure Evolution During Selective Electron Beam Melting of Rene-N5 by Frederick, Curtis Lee, Plotkowski, Alexander, Kirka, Michael M., Haines, Michael, Staub, Austin, Schwalbach, Edwin J., Cullen, David, Babu, S. S.

“…High gamma prime ( γ ′) nickel-based alloys produced by selective electron beam melting are of interest to the turbine industry which requires control of…”
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Microstructure Evolution and Tensile Properties of a Selectively Laser Melted CoNi-Base Superalloy by Murray, Sean P., Raeker, Evan B., Pusch, Kira M., Frey, Carolina, Torbet, Chris J., Zhou, Ning, Forsik, Stéphane A. J., Dicus, Austin D., Colombo, Gian A., Kirka, Michael M., Pollock, Tresa M.

“…A high γ ′ volume fraction CoNi-base superalloy with roughly equal amounts of cobalt and nickel was successfully processed through selective laser melting. The…”
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