Zobrazeno 1 - 10
of 50
pro vyhledávání: '"John D, Roehling"'
Autor:
Tien T. Roehling, Rongpei Shi, Saad A. Khairallah, John D. Roehling, Gabe M. Guss, Joseph T. McKeown, Manyalibo J. Matthews
Publikováno v:
Materials & Design, Vol 195, Iss , Pp 109071- (2020)
Gaussian laser intensity profiles are standard in laser-based metal additive manufacturing, although recent work in single-layer melt tracks showed that beam shaping could offer a feasible route towards microstructural control. Since thermal cycling
Externí odkaz:
https://doaj.org/article/13d9316954214e5dba14aa20eb1fe376
Publikováno v:
Procedia CIRP. 111:71-74
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66b37f4f79f48f5a678e105db2dd4198
https://doi.org/10.1016/j.procir.2022.08.128
https://doi.org/10.1016/j.procir.2022.08.128
Autor:
Debra L. Rosas, Saad A. Khairallah, Jean-Luc Fattebert, Joel Berry, Aurélien Perron, John A. Turner, Tien T. Roehling, Bey Vrancken, Joseph T. McKeown, Manyalibo J. Matthews, John D. Roehling
Publikováno v:
Materials Today. 51:65-86
Much of the latent promise of metal additive manufacturing (AM) rests in the potential for controlled creation of spatially tailored microstructures, designed to optimize key build-scale properties through systematic variation across a build. Compone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5ed8a936f1f8ddff970cbd69a331be1
https://doi.org/10.1016/j.mattod.2021.09.024
https://doi.org/10.1016/j.mattod.2021.09.024
Autor:
Omar R. Mireles, Erin Lanigan, Paul R. Gradl, Kevin Wheeler, Timothy M. Smith, David Scannapieco, Jeremy Iten, John D. Roehling, William L. Smith, Manyalibo J. Matthews, Anton Du Plessis
Publikováno v:
Metal Additive Manufacturing for Propulsion Applications ISBN: 9781624106262
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28b2a2cc96c4ce80c1951e620f2a8f8d
https://doi.org/10.2514/5.9781624106279.0645.0716
https://doi.org/10.2514/5.9781624106279.0645.0716
Autor:
Rongpei Shi, Thejaswi U. Tumkur, Bey Vrancken, John D. Roehling, Joseph T. McKeown, Manyalibo J. Matthews, William L. Smith, R.K. Ganeriwala, Tien T. Roehling, Gabriel M. Guss, Saad A. Khairallah
Publikováno v:
Procedia CIRP. 94:200-204
Laser powder bed fusion has proven to be an effective additive manufacturing technology for the manufacture of complex metal components. However, the local thermal history associated with Gaussian beam, raster scan processes produces heterogeneous an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::060c13c083f1243b6182064ec12007ff
https://doi.org/10.1016/j.procir.2020.09.038
https://doi.org/10.1016/j.procir.2020.09.038
Autor:
Y. Morris Wang, Maira R. Cerón, Sanjit Bhowmick, Ling Liu, Juergen Biener, Monika M. Biener, Jip van Ham, James S. Oakdale, William L. Smith, Thomas Voisin, Jianchao Ye, Patrick Onck, Joseph Lefebvre, Leonardus Bimo Bayu Aji, John D. Roehling
Publikováno v:
Nature Materials, 20(11), 1498-1505. Nature Publishing Group
Porous materials with engineered stretching-dominated lattice designs, which offer attractive mechanical properties with ultra-light weight and large surface area for wide-ranging applications, have recently achieved near-ideal linear scaling between
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::20e3f7fd171b106231de481a268db897
https://research.rug.nl/en/publications/8f0599f4-71a7-4e8a-851b-2c64c8ac9b2a
https://research.rug.nl/en/publications/8f0599f4-71a7-4e8a-851b-2c64c8ac9b2a
Autor:
Michael R. Hill, Maria Strantza, Manyalibo J. Matthews, Ava S. Ashby, Bey Vrancken, John D. Roehling, Joseph T. McKeown, William L. Smith, Gabriel M. Guss, Bjørn Clausen, Donald W. Brown, R.K. Ganeriwala
Fabricating parts using laser powder bed fusion (LPBF) is of growing interest to many fields, ranging from medical to aerospace, but this process is often plagued with residual stresses that can reach magnitudes as high as the yield strength of the m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3142fdd1ab4ac7ee15bfd3fc2e282d53
https://escholarship.org/uc/item/46z1c7q2
https://escholarship.org/uc/item/46z1c7q2
Autor:
Michael F. Crumb, Thomas Voisin, Saad A. Khairallah, Tien T. Roehling, Manyalibo J. Matthews, Thejaswi U. Tumkur, John D. Roehling, Rongpei Shi, Sheldon Wu, Philip J. Depond, Gabe Guss
Publikováno v:
Science Advances. 7
High thermal gradients and complex melt pool instabilities involved in powder bed fusion–based metal additive manufacturing using focused Gaussian-shaped beams often lead to high porosity, poor morphological quality, and degraded mechanical perform
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71da855a93f3a99ee8fabbcd30019dfd
https://doi.org/10.1126/sciadv.abg9358
https://doi.org/10.1126/sciadv.abg9358
Autor:
Tien T. Roehling, Bey Vrancken, William L. Smith, Michael R. Hill, Joseph T. McKeown, Gabriel M. Guss, Manyalibo J. Matthews, John D. Roehling
Publikováno v:
Additive Manufacturing. 28:228-235
High residual stresses are typical in additively manufactured metals and can reach levels as high as the yield strength, leading to distortions and even cracks. Here, an in situ method for controlling residual stress during laser powder bed fusion ad
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f547dca9f7f8b73f92467dfa3d322864
https://doi.org/10.1016/j.addma.2019.05.009
https://doi.org/10.1016/j.addma.2019.05.009
Autor:
Clemens Prescher, Joseph T. McKeown, Jonathan C. Crowhurst, Eduardo Granados, Inhyuk Nam, Elissaios Stavrou, Sergey S. Lobanov, Jonathan L. Belof, Peter Walter, S. Brown, John D. Roehling, Bob Nagler, Art J. Nelson, Alexander F. Goncharov, Harry B. Radousky, Graeme J. Ackland, Arianna Gleason, Nick Teslich, Tian T. Li, Vitali B. Prakapenka, Nicholas Holtgrewe, Hongxiang Zong, Michael R. Armstrong, Ryan A. Austin, Hae Ja Lee, Paulius Grivickas
Publikováno v:
JOM
Armstrong, M R, Radousky, H B, Austin, R A, Stavrou, E, Zong, H, Ackland, G J, Brown, S, Crowhurst, J C, Gleason, A E, Granados, E, Grivickas, P, Holtgrewe, N, Lee, H J, Li, T T, Lobanov, S, McKeown, J T, Nagler, B, Nam, I, Nelson, A J, Prakapenka, V, Prescher, C, Roehling, J D, Teslich, N E, Walter, P, Goncharov, A F & Belof, J L 2021, ' Observation of Fundamental Mechanisms in Compression-Induced Phase Transformations Using Ultrafast X-ray Diffraction ', JOM, pp. 1-9 . https://doi.org/10.1007/s11837-020-04535-4
Armstrong, M R, Radousky, H B, Austin, R A, Stavrou, E, Zong, H, Ackland, G J, Brown, S, Crowhurst, J C, Gleason, A E, Granados, E, Grivickas, P, Holtgrewe, N, Lee, H J, Li, T T, Lobanov, S, McKeown, J T, Nagler, B, Nam, I, Nelson, A J, Prakapenka, V, Prescher, C, Roehling, J D, Teslich, N E, Walter, P, Goncharov, A F & Belof, J L 2021, ' Observation of Fundamental Mechanisms in Compression-Induced Phase Transformations Using Ultrafast X-ray Diffraction ', JOM, pp. 1-9 . https://doi.org/10.1007/s11837-020-04535-4
As theoretically hypothesized for several decades in group IV transition metals, we have discovered a dynamically stabilized body-centered cubic (bcc) intermediate state in Zr under uniaxial loading at sub-nanosecond timescales. Under ultrafast shock
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b29faf34b90aaffa6317ba21b42b6268
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5005410
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5005410