Strain partitioning and back-stress evaluation in harmonic-structure materials

被引：18

作者：

Orlov, Dmytro ^{[1
]}

Kulagin, Roman ^{[2
]}

Beygelzimer, Yan ^{[3
]}

机构：

[1] Lund Univ, Div Mat Engn, LTH, Lund, Sweden

[2] Karlsruhe Inst Technol, Inst Nanotechnol, Karlsruhe, Germany

[3] NASU, Donetsk Inst Phys & Engn, Kiev, Ukraine

来源：

MATERIALS LETTERS | 2020年 / 275卷

基金：

瑞典研究理事会;

关键词：

Metal and alloys; Heterostructures; Harmonic structure; Plastic deformation; Mechanical properties; DEFORMATION; DUCTILITY;

D O I：

10.1016/j.matlet.2020.128126

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Heterogenous bimodal harmonic-structure (HS) materials are interesting because of excellent structural efficiency. In this work, we present a simple yet powerful analytical model allowing to evaluate strain partitioning between coarse- and ultrafine-grain (CG and UFG, respectively) structure components in HS materials and to estimate the magnitude of back-stress forming at their interphases. The analysis of experimental results on pure nickel using this model shows that HS promotes a favourable strain partitioning between CG and UFG components and the build-up of back-stress in the vicinity of their interfaces allowing the material performance to exceed expectations from the rule of mixtures. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：4

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