Macroscopic Twinning Strain in Nanocrystalline Cu

F. Wu; Y.T. Zhu; J. Narayan

doi:10.1080/21663831.2013.862874

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Macroscopic Twinning Strain in Nanocrystalline Cu

Original Reports | 更新时间：2026-08-19

- Macroscopic Twinning Strain in Nanocrystalline Cu
- Macroscopic Twinning Strain in Nanocrystalline Cu
- 材料研究快报（英文） 2014年2卷第2期页码：63-69
- 作者机构：
  
  Department of Materials Science & Engineering North Carolina State University Raleigh
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2013.862874
  中图分类号：
- 网络首发：2013-11-29，
  
  纸质出版：2014
- 稿件说明：
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F. Wu, Y.T. Zhu, J. Narayan. Macroscopic Twinning Strain in Nanocrystalline Cu[J]. 材料研究快报（英文）, 2014,2(2):63-69.

F. Wu, Y.T. Zhu, J. Narayan. Macroscopic Twinning Strain in Nanocrystalline Cu[J]. Materials Research Letters, 2014, 2(2): 63-69.
F. Wu, Y.T. Zhu, J. Narayan. Macroscopic Twinning Strain in Nanocrystalline Cu[J]. 材料研究快报（英文）, 2014,2(2):63-69. DOI： 10.1080/21663831.2013.862874.

F. Wu, Y.T. Zhu, J. Narayan. Macroscopic Twinning Strain in Nanocrystalline Cu[J]. Materials Research Letters, 2014, 2(2): 63-69. DOI： 10.1080/21663831.2013.862874.

摘要

Abstract

Most deformation twins in nanocrystalline face-centered cubic (NC fcc) metals are reported to produce zero-macrostrain

which is attributed to either random activation of partials (RAP) or cooperative slip of three partials (CSTP). Here

we report that when the RAP mechanism is suppressed

∼44% twins in NC Cu produced zero-macrostrain via the CSTP mechanism. This indicates that both RAP and CSTP are major mechanisms to generate zero-macrostrain twins. In addition

our results also indicate that stress state affects the twinning mechanism in NC fcc metals

and monotonic activation of partials with the same Burgers vector dominates twin formation under monotonic stress.

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