Results 61 to 70 of about 58,697 (194)

Multi-scale investigation of short-range order and dislocation glide in MoNbTi and TaNbTi multi-principal element alloys

npj Computational Materials, 2023
Refractory multi-principal element alloys (RMPEAs) are promising materials for high-temperature structural applications. Here, we investigate the role of short-range ordering (SRO) on dislocation glide in the MoNbTi and TaNbTi RMPEAs using a multi-scale ...
Hui Zheng, Lauren T. W. Fey, Xiang-Guo Li, Yong-Jie Hu, Liang Qi, Chi Chen, Shuozhi Xu, Irene J. Beyerlein, Shyue Ping Ong   +8 more
doaj   +1 more source

Discrete dislocation dynamics simulations of dislocation-$\theta'$ precipitate interaction in Al-Cu alloys

, 2018
The mechanisms of dislocation/precipitate interaction were studied by means of discrete dislocation dynamics within a multiscale approach. Simulations were carried out using the discrete continuous method in combination with a fast Fourier transform ...
Capolungo, L., Esteban-Manzanares, G., LLorca, J., Papadimitriou, I., Santos-Güemes, R., Segurado, J.   +5 more
core   +1 more source

In-situ TEM Study of Dislocation Loop Evolution in Tungsten under Dual-ion Beam Irradiation

Yuanzineng kexue jishu
Fusion reactors are regarded as the ultimate source of energy for addressing future power problems. However, prior to the building of fusion power plants, a number of scientific obstacles including significant degradation of plasma-facing material (PFM).
MA Pengfei1, LIU Yan2, CAO Liuxuan2, ZHANG Yapei1, LI Xiurui1, TIAN Wenxi1, QIU Suizheng1, SU Guanghui1
doaj   +1 more source

Perfectly conducting channel on the dark surface of weak topological insulators

, 2013
A weak topological insulator (WTI) bears, generally, an even number of Dirac cones on its surface; they are susceptible of doubling, while on the surface of a certain orientation it shows no Dirac cone.
Imura, Ken-Ichiro, Matsumoto, Akihiko, Takane, Yositake, Yoshimura, Yukinori   +3 more
core   +1 more source

Phason Sinks of Radiation Defects in Quasicrystals

East European Journal of Physics, 2013
Phason sinks of radiation defects in quasicrystals are considered as partial point defects. The kinetics of point defect absorption by single phasons is studied. A model of the dislocation loop with the phason fault under irradiation is developed.
Galina Lazareva, Aleksandr Bakai
doaj  

Non-singular dislocation loops in gradient elasticity

, 2012
Using gradient elasticity, we give in this Letter the non-singular fields produced by arbitrary dislocation loops in isotropic media. We present the `modified' Mura, Peach-Koehler and Burgers formulae in the framework of gradient elasticity theory ...
Lazar, Markus
core   +1 more source

Plastic damage evolution in structural steel and its non-destructive evaluation

Journal of Materials Research and Technology, 2020
This paper reports the plastic damage evolution in low carbon structural steel and its NDT evaluation. The SEM observations reveal that the voids initiation, growth, coalescence, micro-crack propagation, and macro-crack formation are the main failure ...
Xiao Wang, Jian-Guo Chen, Guo-feng Su, Hua-Ying Li, Chuang Wang   +4 more
doaj   +1 more source

Fast algorithms for evaluating the stress field of dislocation lines in anisotropic elastic media

, 2017
In dislocation dynamics (DD) simulations, the most computationally intensive step is the evaluation of the elastic interaction forces among dislocation ensembles.
Arsenlis, A., Aubry, S., Chen, C., Darve, E., Oppelstrup, T.   +4 more
core   +1 more source

In-situ S/TEM investigations of deformation and damage mechanisms in neutron-irradiated EUROFER97

Philosophical Magazine Letters
In this work, we employed in-situ S/TEM techniques to investigate deformation and damage mechanisms in neutron-irradiated reduced-activation ferritic/martensitic (RAFM) EUROFER97 steel subjected to a dose of 15 dpa at 330 °C.
Qian Yuan, Ankur Chauhan, Lakshay Chauhan, Dimitri Litvinov, Ermile Gaganidze, Hans-Christian Schneider, Jarir Aktaa   +6 more
doaj   +1 more source

Minimum energy path for the nucleation of misfit dislocations in Ge/Si(001) heteroepitaxy

, 2016
A possible mechanism for the formation of a 90{\deg} misfit dislocation at the Ge/Si(001) interface through homogeneous nucleation is identified from atomic scale calculations where a minimum energy path connecting the coherent epitaxial state and a ...
Ala-Nissila, Tapio, Granato, Enzo, Jonsson, Hannes, Maras, Emile, Stukowski, Alexander, Trushin, Oleg, Ying, See Chen   +6 more
core   +1 more source