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Dynamic recrystallization initiated by direct grain reorientation at high-angle grain boundary in -titanium
Wang, Hao; Bao, Qili L.; Zhou, Gang; Qiu, J. K.; Yang, Yi; Ma, Y. J.; Bai, Chunguang G.; Xu, Dongsheng S.; Rugg, David; Huang, Aijun J.; Hu, Qing-Miao; Lei, J. F.; Yang, Rui
2019-05-14
Source PublicationJOURNAL OF MATERIALS RESEARCH
ISSN0884-2914
Volume34Issue:9Pages:1608-1621
AbstractEmploying atomic-scale simulations, the response of a high-angle grain boundary (GB), the soft/hard GB, against external loading was systematically investigated. Under tensile loading close to the hard orientation, strain-induced dynamic recrystallization was observed to initiate through direct soft-to-hard grain reorientation, which was triggered by stress mismatch, inhibited by surface tension from the soft-hard GB, and proceeded by interface ledges. Such grain reorientation corresponds with expansion and contraction of the hard grain along and perpendicular to the loading direction, respectively, accompanied by local atomic shuffling, providing relatively large normal strain of 8.3% with activation energy of 0.04 eV per atom. Tensile strain and residual dislocations on the hard/soft GB facilitate the initiation of dynamic recrystallization by lowering the energy barrier and the critical stress for grain reorientation, respectively.
Keywordplastic deformation grain boundary recrystallization reorientation atomistic simulation
Indexed BySCI
Language英语
WOS IDWOS:000471320700015
PublisherCAMBRIDGE UNIV PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81098
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Wang, Hao,Bao, Qili L.,Zhou, Gang,et al. Dynamic recrystallization initiated by direct grain reorientation at high-angle grain boundary in -titanium[J]. JOURNAL OF MATERIALS RESEARCH,2019,34(9):1608-1621.
APA Wang, Hao.,Bao, Qili L..,Zhou, Gang.,Qiu, J. K..,Yang, Yi.,...&Yang, Rui.(2019).Dynamic recrystallization initiated by direct grain reorientation at high-angle grain boundary in -titanium.JOURNAL OF MATERIALS RESEARCH,34(9),1608-1621.
MLA Wang, Hao,et al."Dynamic recrystallization initiated by direct grain reorientation at high-angle grain boundary in -titanium".JOURNAL OF MATERIALS RESEARCH 34.9(2019):1608-1621.
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