Dynamic Vickers indentation of brittle materials

被引：107

作者：

Anton, RJ ^{[1
]}

Subhash, G ^{[1
]}

机构：

[1] Michigan Technol Univ, Dept Mech Engn Engn Mech, Houghton, MI 49931 USA

来源：

WEAR | 2000年 / 239卷 / 01期

基金：

美国国家科学基金会;

关键词：

dynamic indentation; dynamic fracture toughness; ceramics;

D O I：

10.1016/S0043-1648(99)00364-6

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Static and dynamic Vickers indentations were performed on brittle materials to investigate the rate effects in hardness, induced crack morphologies, and fracture toughness. The dynamic indentations were performed on a hardness tester, which utilizes elastic stress wave propagation phenomena in a slender rod that can deliver indentation loads of 100 mu s durations. Under dynamic indentations, an increase in hardness was observed in all the brittle materials compared to their static hardness measurements. Analysis of the evolved crack morphology revealed an increase in fracture toughness for zirconia ceramics and a decrease in fracture toughness for pyrex glass under dynamic indentations. The implications of the rate dependence of hardness and fracture toughness on material removal mechanisms are discussed. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：27 / 35

页数：9

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