The micro- to nano-scale dislocation mechanics of (001) MgO crystal hardness

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Philosophical Magazine Letters Pub Date : 2021-09-10 DOI:10.1080/09500839.2021.1973683

R. Armstrong, W. Elban

引用次数: 0

Abstract

ABSTRACT Micro- to nano-indentation hardness-based stress–strain computations made for Berkovich spherically-tipped impressions put into (001) MgO crystal surfaces show an exceptional plastic strain hardening that is attributed to reacted sessile-type <110> Burgers vector dislocations. Additional evidence for the substantial strain hardening is provided in a compilation of Knoop hardness measurements. The combination of results is compared on the basis of an applied load dependence for an indentation size effect (ISE).

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(001) MgO晶体硬度的微纳米位错力学

对(001)MgO晶体表面的Berkovich球端压痕进行了基于微到纳米压痕硬度的应力应变计算，结果显示，由于反应的无基型Burgers矢量位错，出现了异常的塑性应变硬化。在努氏硬度测量的汇编中提供了大量应变硬化的额外证据。结果的组合是在压痕尺寸效应(ISE)的应用载荷依赖的基础上进行比较的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Philosophical Magazine Letters 物理-物理：凝聚态物理

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

2.7 months

期刊介绍： Philosophical Magazine Letters is the rapid communications part of the highly respected Philosophical Magazine, which was first published in 1798. Its Editors consider for publication short and timely contributions in the field of condensed matter describing original results, theories and concepts relating to the structure and properties of crystalline materials, ceramics, polymers, glasses, amorphous films, composites and soft matter. Articles emphasizing experimental, theoretical and modelling studies on solids, especially those that interpret behaviour on a microscopic, atomic or electronic scale, are particularly appropriate. Manuscripts are considered on the strict condition that they have been submitted only to Philosophical Magazine Letters , that they have not been published already, and that they are not under consideration for publication elsewhere.