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127 results on '"Hebert, Rainer J."'

5. Contributors

Author

Aboulkhair, Nesma T., primary, Becker, Stefan, additional, Benoit, Michael, additional, Bosio, Federico, additional, Breitkopf, Piotr, additional, Brochu, Mathieu, additional, Chahal, Vedant, additional, Chalasani, Dharmendra, additional, Czwielong, Felix, additional, Darabi, Ali Cheloee, additional, de Formanoir, Charlotte, additional, Dogahe, Kiarash, additional, Drexler, Hugo, additional, Easton, Mark, additional, Foadian, Farzad, additional, Geyer, Thomas F., additional, Gilani, Negar, additional, Goh, Guo Dong, additional, Goh, Guo Liang, additional, Guski, Vinzenz, additional, Hague, Richard J.M., additional, Harrison, David K., additional, Hebert, Rainer J., additional, Hitzler, Leonhard, additional, Horr, Amir, additional, Kabliman, Evgeniya, additional, Kadkhodapour, Javad, additional, Khani, Somayeh, additional, Kingsbury, Alex, additional, Klein, Thomas, additional, Kremer, Robert, additional, Kronsteiner, Johannes, additional, Li, Jinghao, additional, Li, Wei, additional, Logé, Roland E., additional, Mehmert, Patrick, additional, Merkel, Markus, additional, Mirhakimi, Anooshe Sadat, additional, Mirzaali, M.J., additional, Mishra, Rajiv S., additional, Mohammadi, Mohsen, additional, Molotnikov, Andrey, additional, Montazerian, Hossein, additional, Neubauer, Erich, additional, Nicolay, Pascal, additional, Öchsner, Andreas, additional, Ocker, Christof, additional, Olga, Zinovieva, additional, O'Toole, Patrick, additional, Patil, Sandeep, additional, Phutela, Chinmay, additional, Ruslan, Balokhonov, additional, Sajadi, Felix, additional, Schmauder, Siegfried, additional, Schuhmann, Dirk, additional, Sert, Enes, additional, Shahriari, Nasim, additional, Sing, Swee Leong, additional, Taylor, Robert, additional, Thapliyal, Saket, additional, Tuck, Christopher J., additional, Varvara, Romanova, additional, Werner, Ewald, additional, Willmann, Roland, additional, Yeong, Wai Yee, additional, Zadpoor, A.A., additional, Zettel, Dominic, additional, Zhao, Nanzhu, additional, Zhao, Yaoyao Fiona, additional, Zhou, J., additional, and Zhu, Hanyu, additional

Published
2023
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23. Optical response of nickel-based superalloy Inconel-718 for applications in additive manufacturing.

Author

Curry, Erin B., Sahoo, Sanjubala, Herrera, Chloe, Sochnikov, Ilya, Pamir Alpay, S., Hebert, Rainer J., Willis, Brian G., Qi, Jie, and Hancock, Jason N.

Subjects
DIRECT metal laser sintering, NICKEL alloys, EMISSIVITY, HEAT resistant alloys, MANUFACTURING processes, OPTICAL properties
Abstract

We present a broadband infrared and optical study of the compositionally complex nickel-based superalloy Inconel-718, a common material used in additive manufacturing using the direct metal laser sintering (DMLS) technique. We find a broad, featureless spectral emissivity, which is consistent with dc transport measurements and contextualize the results against literature reports of disordered metals. We show that electronic structure calculations based on first-principles modeling can explain most of the spectral weight distribution and show that the peculiar infrared optical properties in this class of materials can present challenges in accurately reporting remote temperature sensing in DMLS. [ABSTRACT FROM AUTHOR]

Published
2020
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34. Alloying reactions in nanostructured multilayers during intense deformation

Author

Perepezko, John H. and Hebert, Rainer J.

Abstract

Under intense deformation of metallic multilayer samples, a nanometer-scale layer thickness and grain size develops during repeated cold-rolling. Along with the evolution of the highly refined microstructure, a nanoscale interfacial alloying occurs that can result in an amorphization reaction. The deformation of multilayers exhibits driven system behavior during alloying. As the length scale of the layer thickness converges to the length scale of the mixing zone during rolling, amorphization develops in appreciable volumes. The results from selected experiments demonstrate that the relative specific interfacial area is the key microstructural metric to describe the deformation-driven alloying.

Published
2022
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41. Nanocrystals in Metallic Glasses

Author

Hebert, Rainer J.

Subjects
Science / Physics / Condensed Matter
Abstract

Nanocrystals in Metallic Glasses

Published
2011

43. The effect of recycling on the oxygen distribution in Ti-6Al-4V powder for additive manufacturing.

Author

Sun, Yu, Aindow, Mark, and Hebert, Rainer J.

Subjects
TITANIUM alloys, METAL recycling, OXYGEN content of metal, METAL powder analysis, THREE-dimensional printing, METAL microstructure, ELECTRON microscopy
Abstract

Ti-6Al-4V powder has been recycled 30 times in an electron beam melting system. A combination of electron microscopy techniques has been used to show that the recycled powder has a 35% higher oxygen content, and that the particles have a more irregular morphology, a narrower particle size distribution, and a much more variable microstructure than the virgin powder. The microstructures in the recycled powder particles vary from a martensitic α′ structure, which is identical to that in the virgin powder, to a two-phase α + β structure. This variability is related to the complex thermal history of the unmelted metal powder in the system. Despite these differences, all of the particles exhibit essentially the same surface oxide thickness; the excess oxygen in the recycled powders is instead located in the β phase. The possible consequences for the structure and properties of the resultant additively manufactured parts are discussed. [ABSTRACT FROM AUTHOR]

Published
2018
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