材料科学技术(英文版)2021，Vol.92Issue(33) ：208-213.

The relationship between slip behavior and dislocation arrangement for large-size Mo-3Nb single crystal at room temperature

Benqi Jiao Qinyang Zhao Yongqing Zhao Laiping Li Zhongwu Hu Xuanqiao Gao Wen Zhang Jianfeng Li
材料科学技术(英文版)2021，Vol.92Issue(33) ：208-213.
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  • NSTL
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  • 万方数据

The relationship between slip behavior and dislocation arrangement for large-size Mo-3Nb single crystal at room temperature

Benqi Jiao 1Qinyang Zhao 2Yongqing Zhao 3Laiping Li 4Zhongwu Hu 4Xuanqiao Gao 4Wen Zhang 4Jianfeng Li4
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作者信息

  • 1. School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China
  • 2. School of Material Science and Engineering,Chang'an University,Xi'an 710064,China
  • 3. School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China;Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China
  • 4. Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China
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Abstract

The slip behavior and mechanism of large-size Mo-3Nb single crystal have been investigated and dis-closed comprehensively at room temperature by quasi-static compression with various strains.With the increase of deformation,the slip traces change from shallow non-uniform slip lines to dense and uniform slip bands.Different slip traces in the same deformation condition were observed,suggesting that the slip traces in the single crystal are controlled by different types and arrangement mechanisms of mo-bile dislocation.To clarify the relationship between slip behavior and dislocation arrangement,TEM and AFM analyses were performed.Significant discrepancy between the mobility of screw segments and edge segments caused by double cross-slip multiplication mechanism is the reason why different slip features were witnessed.During the whole slip deformation process,screw dislocations play a dominant role and they are inclined to form wall-substructures by interaction and entanglement.With the development of dislocation accumulation,the entangled dislocation walls evolve into dislocation cells with higher stabil-ity.

Key words

Mo-3Nb single crystal/Slip behavior/Dislocation/Cross-slip/Substructure evolution mechanism

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基金项目

Major Science and Technology Project of Shaanxi Province,China(2020zdzx04-02-02)

Key Research and Development Program of Shaanxi,China(2019ZDLGY05-04)

Key Research and Development Program of Shaanxi,China(2019ZDLGY05-06)

National key Research and Development Program(2017YFB0306003)

Northwest Institute for Nonferrous Metal Research(NIN)China,for providing the sin-gle crystal Mo-3Nb alloy()

出版年

2021
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
被引量1
参考文献量30
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