Additional hardening in harmonic structured materials by strain partitioning and back stress

Hyung Keun Park; Kei Ameyama; Jongmyung Yoo; Hyunsang Hwang; Hyoung Seop Kim

doi:10.1080/21663831.2018.1439115

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Additional hardening in harmonic structured materials by strain partitioning and back stress

Original Report | 更新时间：2026-08-19

- Additional hardening in harmonic structured materials by strain partitioning and back stress
- Materials Research Letters Vol. 6, Issue 5, Pages: 261-267(2018)
- 作者机构：
  
  1. Department of Materials Science and Engineering Pohang University of Science and Technology (POSTECH)
  2. Faculty of Science and Engineering Ritsumeikan University
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2018.1439115
  CLC：
- Online First：20 February 2018，
  
  Published：2018
- 稿件说明：
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Hyung Keun Park, Kei Ameyama, Jongmyung Yoo, et al. Additional hardening in harmonic structured materials by strain partitioning and back stress[J]. Materials Research Letters, 2018, 6(5): 261-267.
DOI：

Hyung Keun Park, Kei Ameyama, Jongmyung Yoo, et al. Additional hardening in harmonic structured materials by strain partitioning and back stress[J]. Materials Research Letters, 2018, 6(5): 261-267. DOI： 10.1080/21663831.2018.1439115.

摘要

Abstract

BSTRACTDeformation behavior of a harmonic structured material (HSM)

core–shell 304L stainless steel

is investigated using micro-digital image correlation (micro-DIC). High strain-partitioning between core and shell is observed. Because the grain boundaries with a grain-size gradient in HSM induce high deformation-incompatibility

strain peaks are detected near core–shell boundaries and in grain boundaries of cores. This incompatibility is compensated by geometrically necessary dislocations

generating back stress. The back stress is measured using tensile unloading-reloading testing. This investigation demonstrates higher back stress and strain hardening rate in HSMs than homogeneous materials

resulting in enhanced ductility.

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