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).

中文翻译：

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(001) MgO晶体硬度的微米到纳米级位错力学

摘要

对放入 (001) MgO 晶体表面的 Berkovich 球形尖端压痕进行的基于微米到纳米压痕硬度的应力应变计算显示出异常的塑性应变硬化，这归因于反应的固着型 <110> Burgers 矢量位错。努氏硬度测量的汇编中提供了大量应变硬化的其他证据。结果的组合基于压痕尺寸效应 (ISE) 的应用负载依赖性进行比较。