Roughening and strain-field evolution at a grain boundary in α−Al2O3

2018 ◽  
Vol 2 (11) ◽  
Author(s):  
Sung Bo Lee ◽  
Seung-Yong Lee ◽  
Seung Jo Yoo ◽  
Yoonkoo Kim ◽  
Jin-Gyu Kim ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Strain Field ◽  
Field Evolution ◽  
Α Al2o3

Fast hydrogen diffusion along the Σ7 grain boundary of α-Al2O3: A first-principles study

2016 ◽  
Vol 41 (47) ◽  
pp. 22214-22220 ◽  
Author(s):  
Fei Wang ◽  
Wensheng Lai ◽  
Rusong Li ◽  
Bin He ◽  
Sufen Li
Keyword(s):  
Grain Boundary ◽  
First Principles ◽  
Hydrogen Diffusion ◽  
First Principles Study ◽  
Α Al2o3

Increased mobility of an α-Al2O3 grain boundary by electron-beam irradiation

2017 ◽  
Vol 53 (4) ◽  
pp. 2383-2388 ◽  
Author(s):  
Sung Bo Lee ◽  
Seung-Yong Lee ◽  
Miyoung Kim ◽  
Heung Nam Han
Keyword(s):  
Electron Beam ◽  
Grain Boundary ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Α Al2o3

scholarly journals Strain field evolution at the ductile-to-brittle transition: a case study on ice

Solid Earth ◽  
2017 ◽  
Vol 8 (5) ◽  
pp. 943-953 ◽  
Author(s):  
Thomas Chauve ◽  
Maurine Montagnat ◽  
Cedric Lachaud ◽  
David Georges ◽  
Pierre Vacher
Keyword(s):  
Stress Concentration ◽  
Dynamic Recrystallization ◽  
Strain Field ◽  
Crack Opening ◽  
Local Stress ◽  
Image Correlation ◽  
Brittle Transition ◽  
Field Evolution ◽  
Crack Tips ◽  
Ductile To Brittle Transition

Abstract. This paper presents, for the first time, the evolution of the local heterogeneous strain field around intra-granular cracking in polycrystalline ice, at the onset of tertiary creep. Owing to the high homologous temperature conditions and relatively low compressive stress applied, stress concentration at the crack tips is relaxed by plastic mechanisms associated with dynamic recrystallization. Strain field evolution followed by digital image correlation (DIC) directly shows the redistribution of strain during crack opening, but also the redistribution driven by crack tip plasticity mechanisms and recrystallization. Associated local changes in microstructure induce modifications of the local stress field evidenced by crack closure during deformation. At the ductile-to-brittle transition in ice, micro-cracking and dynamic recrystallization mechanisms can co-exist and interact, the later being efficient to relax stress concentration at the crack tips.

Strain field evolution on the surface of aluminum sheet alloys exposed to specific impact with oscillation loading

2014 ◽  
Vol 50 (1) ◽  
pp. 61-72 ◽  
Author(s):  
Mykola G Chausov ◽  
Valentyn B Berezin ◽  
Andrii P Pylypenko ◽  
Volodymyr B Hutsaylyuk
Keyword(s):  
Strain Field ◽  
Aluminum Sheet ◽  
Field Evolution ◽  
Specific Impact

Yttrium doping effect on oxygen grain boundary diffusion in α-Al2O3

2007 ◽  
Vol 55 (19) ◽  
pp. 6627-6633 ◽  
Author(s):  
Tsubasa Nakagawa ◽  
Isao Sakaguchi ◽  
Naoya Shibata ◽  
Katsuyuki Matsunaga ◽  
Teruyasu Mizoguchi ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Boundary Diffusion ◽  
Grain Boundary Diffusion ◽  
Doping Effect ◽  
Α Al2o3 ◽  
Yttrium Doping
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