In-situ observation of dislocation dynamics near heterostructured interfaces

Hao Zhou; Chongxiang Huang; Xuechao Sha; Lirong Xiao; Xiaolong Ma; Heinz Werner Höppel; Mathias Göken; Xiaolei Wu; Kei Ameyama; Xiaodong Han; Yuntian Zhu

doi:10.1080/21663831.2019.1616330

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In-situ observation of dislocation dynamics near heterostructured interfaces

Original Report | 更新时间：2026-08-19

- In-situ observation of dislocation dynamics near heterostructured interfaces
- Materials Research Letters Vol. 7, Issue 9, Pages: 376-382(2019)
- 作者机构：
  
  1. School of Aeronautics and Astronautics Sichuan University
  2. Beijing Key Lab of Microstructure and Property of Advanced Materials Beijing University of Technology
  3. Nano and Heterogeneous Material Center Nanjing University of Science and Technology
  4. Institute I: General Materials Properties Friedrich-Alexander Universität Erlangen-Nürnberg
  5. Institute of Mechanics Chinese Academy of Sciences
  6. Department of Mechanical Engineering Faculty of Science and Engineering Ritsumeikan University
  7. Nano and Heterogeneous Material Center Nanjing University of Science and Technology Nanjing People’s Republic of China
  8. Department of Materials Science and Engineering North Carolina State University Raleigh
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2019.1616330
  CLC：
- Online First：20 May 2019，
  
  Published：2019
- 稿件说明：
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Hao Zhou, Chongxiang Huang, Xuechao Sha, et al. In-situ observation of dislocation dynamics near heterostructured interfaces[J]. Materials Research Letters, 2019, 7(9): 376-382.
DOI：

Hao Zhou, Chongxiang Huang, Xuechao Sha, et al. In-situ observation of dislocation dynamics near heterostructured interfaces[J]. Materials Research Letters, 2019, 7(9): 376-382. DOI： 10.1080/21663831.2019.1616330.

摘要

Abstract

BSTRACTThere has been a long-standing controversy on how dislocations interact with interfaces. Here we report

in-situ

observations that in a Cu–brass heterostructured TEM film Frank–Read sources are the primary dislocation sources. They were dynamically formed and deactivated throughout the deformation in grain interior

which has never been reported before. This observation indicates that strain gradient near interfaces cannot be quantitatively related to the density gradient of geometrically necessary dislocations

and it was primarily produced by Frank–Read source gradient instead of dislocation pile-ups. These findings provide new insights on how to design heterostructured interfaces to enhance mechanical properties.

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Related Author

Yi Liu

Mengning Xu

Lirong Xiao

Xuefei Chen

Zhaohua Hu

Bo Gao

Ningning Liang

Yuntian Zhu

Related Institution

a Nano and Heterogeneous Materials Center School of Materials Science and Engineering Nanjing University of Science and Technology

b School of Materials Science and Engineering Jiangsu University

c Ansteel Beijing Research Institute Co. Ltd.

d Department of Materials Science and Engineering City University of Hong Kong

c School of Mechanical & Aerospace Engineering Nanyang Technological University

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