Revealing the size-independent hardness for geometrical similar indentations in metal

被引：1

作者：

Lu, S. L. ^{[1
,2
]}

Zhang, Z. J. ^{[1
,2
]}

Zhu, Y. K. ^{[1
]}

Zhang, P. ^{[1
,2
]}

Zhang, Z. F. ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China

[2] Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China

来源：

MATERIALS LETTERS | 2021年 / 293卷 / 293期

基金：

中国国家自然科学基金;

关键词：

Hardness; Copper alloys; Finite element analysis; Stress distribution; Expanding cavity model;

D O I：

10.1016/j.matlet.2021.129684

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Based on the expanding cavity model, a new expression of hardness has been proposed, which suggests that hardness is determined by the ratio of the iso-stress surface size r to the indentation depth h. In combination with the experiment results and the finite element modeling analysis, we proved that the size independent hardness for geometrical similar indenter is fundamentally due to the similarity of the stress distribution during the indentation process. This study first reveals the cause of size-independent hardness for geometrical similar indentation through experiments and theoretical analysis without considering the complex constitutive models. (c) 2021 Elsevier B.V. All rights reserved.

引用

页数：4

共 13 条

[1] Subsurface strain distribution around Vickers hardness indentations in annealed polycrystalline copper [J].