Zobrazeno 1 - 10
of 221
pro vyhledávání: '"Pagan, Darren"'
Autor:
Lim, Rachel E., Shang, Shun-Li, Chuang, Chihpin, Phan, Thien Q., Liu, Zi-Kui, Pagan, Darren C.
X-ray diffraction is ideal for probing sub-surface state during complex or rapid thermomechanical loading of crystalline materials. However, challenges arise as the size of diffraction volumes increases due to spatial broadening and inability to deco
Externí odkaz:
http://arxiv.org/abs/2408.09447
Emerging microstructural characterization methods have received increased attention owing to their promise of relatively inexpensive and rapid measurement of polycrystalline surface morphology and crystallographic orientations. Among these nascent me
Externí odkaz:
http://arxiv.org/abs/2406.20014
An innovative method is developed for accurate determination of thermodynamic properties as a function of temperature by revisiting the density functional theory (DFT) based quasiharmonic approach (QHA). The present methodology individually evaluates
Externí odkaz:
http://arxiv.org/abs/2405.09445
Depth-Resolved Characterization of Centrifugal Disk Finishing of Additively Manufactured Inconel 718
Surface characteristics are a major contributor to the in-service performance, particularly fatigue life, of additively manufactured (AM) components. Centrifugal disk finishing (CDF) is one of many rigid media, abrasive machining processes employed t
Externí odkaz:
http://arxiv.org/abs/2404.19084
Autor:
Shankar, Karthik, Setiawan, Meddelin, Shanks, Katherine S., Krug, Matthew E., Kasemer, Matthew P., Pagan, Darren C.
In this study, we employ high-energy X-ray characterization to examine the role of relatively large amounts of intragranular lattice misorientation -- present after many thermomechanical processes -- on the micromechanical response of Al-7085 with a
Externí odkaz:
http://arxiv.org/abs/2404.03579
Elevated pressures are encountered in many metal forming processes that can alter microstructural evolution rates. Here we measure rate changes with pressure in recrystallization and grain growth in Fe through adaptation of synchrotron-compatible mul
Externí odkaz:
http://arxiv.org/abs/2307.14478
Autor:
Lim, Rachel E., Mukherjee, Tuhin, Chuang, Chihpin, Phan, Thien Q., DebRoy, Tarasankar, Pagan, Darren C.
Laser melting, such as that encountered during additive manufacturing (AM), produces extreme gradients of temperature in both space and time, which in turn influence microstructural development in the material. Qualification and model validation of t
Externí odkaz:
http://arxiv.org/abs/2302.03146
Autor:
Pagan, Darren C., Rasel, Md Abu Jafar, Lim, Rachel E., Sheyfer, Dina, Liu, Wenjun, Haque, Aman
Localized residual stress and elastic strain concentrations in microelectronic devices often affect the electronic performance, resistance to thermomechanical damage, and, likely, radiation tolerance. A primary challenge for characterization of these
Externí odkaz:
http://arxiv.org/abs/2207.05789
Here we assess the applicability of graph neural networks (GNNs) for predicting the grain-scale elastic response of polycrystalline metallic alloys. Using GNN surrogate models, grain-averaged stresses during uniaxial elastic tension in Low Solvus Hig
Externí odkaz:
http://arxiv.org/abs/2205.06324
Autor:
Louca, Karim, Shanks, Katherine S., Das, Amlan, Pagan, Darren, Klassen, Robert, Abdolvand, Hamidreza
Publikováno v:
In International Journal of Plasticity October 2024 181
