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题名: Synchrotron high energy X-ray diffraction study of microstructure evolution of severely cold drawn NiTi wire during annealing
作者: Yu, C; Aoun, B; Cui, LS; Liu, YN; Yang, H; Jiang, XH; Cai, S; Jiang, DQ; Liu, ZP; Brown, DE; Ren, Y
刊名: ACTA MATERIALIA
出版日期: 2016
卷号: 115, 页码:35-44
关键词: Shape memory alloy ; Structural relaxation ; Crystallization ; In-situ synchrotron high energy X ray diffraction
DOI: 10.1016/j.actamat.2016.05.039
通讯作者: Cui, LS (reprint author), China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China. ; Cui, LS (reprint author), China Univ Petr, Dept Mat Sci & Engn, Beijing 102249, Peoples R China. ; Liu, YN (reprint author), Univ Western Australia, Sch Mech & Chem Engn, Crawley, WA 6009, Australia.
文章类型: 期刊论文
英文摘要: Microstructure evolution of a cold-drawn NiTi shape memory alloy wire was investigated by means of in situ synchrotron high-energy X-ray diffraction during continuous heating. The cold-drawn wire contained amorphous regions and nano-crystalline domains in its microstructure. Pair distribution function analysis revealed that the amorphous regions underwent structural relaxation via atomic rearrangement when heated above 100 degrees C. The nano-crystalline domains were found to exhibit a strong cold work induced lattice strain anisotropy along 111 , which coincides with the crystallographic fiber orientation of the domains along the wire axial direction. The lattice strain anisotropy systematically decreased upon heating above 200 degrees C, implying a structural recovery. Crystallization of the amorphous phase led to a broadening of the angular distribution of 111 preferential orientations of grains along the axial direction as relative to the original 111 axial fiber texture of the nanocrystalline domains produced by the severe cold wire drawing deformation. (C) 2016 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
收录类别: SCI
语种: 英语
WOS记录号: WOS:000380083400004
ISSN号: 1359-6454
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.sinap.ac.cn/handle/331007/26644
Appears in Collections:中科院上海应用物理研究所2011-2017年_期刊论文

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