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作者:

Ji, Xiaoliang (Ji, Xiaoliang.) | Wang, Lihua (Wang, Lihua.) | Xia, Yiping (Xia, Yiping.) | Guo, Fu (Guo, Fu.) (学者:郭福) | Wang, Chunqing (Wang, Chunqing.)

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EI Scopus SCIE

摘要:

Previous researches on high-symmetric metallic materials demonstrate that the introduction of twins can overcome the strength-ductility trade-off. However, it is uncertain if such a pathway is valid for metals with a low-symmetry crystal structure. Here, the low-symmetry body-centered tetragonal Sn achieved a simultaneous enhancement in tensile ductility from 6 % to 14 % elongation and strength from 36 MPa to 60 MPa at 77 K through pre-twinning combined with room-temperature self-recrystallization. The in-situ tensile experiments reveal that the pre-existing and new deformation twins, as well as dynamic recrystallization and multiple dislocation planar slip contribute to the enhancement of cryogenic mechanical properties.

关键词:

Sn Cryogenic temperatures Dislocation slip Deformation twinning Dynamic recrystallization

作者机构:

  • [ 1 ] [Ji, Xiaoliang]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 2 ] [Wang, Lihua]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 3 ] [Guo, Fu]Beijing Univ Technol, Fac Mat & Mfg, Beijing 100124, Peoples R China
  • [ 4 ] [Wang, Lihua]Beijing Univ Technol, Beijing Key Lab Microstruct & Properties Adv Mat, Beijing 100124, Peoples R China
  • [ 5 ] [Xia, Yiping]Nanjing Tech Univ, Key Lab Light Weight Mat, Nanjing 211816, Peoples R China
  • [ 6 ] [Wang, Chunqing]Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150080, Peoples R China

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来源 :

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

ISSN: 0921-5093

年份: 2023

卷: 888

6 . 4 0 0

JCR@2022

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SCOPUS被引频次: 4

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