Micro-mechanical measurements of fracture toughness of bismuth embrittled copper grain boundaries

被引：66

作者：

Armstrong, D. E. J. ^{[1
]}

Wilkinson, A. J. ^{[1
]}

Roberts, S. G. ^{[1
]}

机构：

[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2011年 / 91卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

fracture toughness; grain boundaries; embrittlement; focussed ion beam; nanoindentation; MECHANICAL-PROPERTIES; BICRYSTALS; FATIGUE; BI; CU; SEGREGATION; BEHAVIOR;

D O I：

10.1080/09500839.2011.573813

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Measuring the fracture properties of single grain boundaries has until now required macroscopic bi-crystals which are expensive and not always available. We describe a method for fracture testing using micro-cantilevers, manufactured using focussed ion beam machining and tested using a nanoindenter. We have used the method to measure the fracture toughness of selected grain boundaries in bismuth-embrittled copper. This technique is applicable to grain boundaries in other brittle polycrystalline samples for which large bi-crystals cannot be produced for conventional testing.

引用

页码：394 / 400

页数：7

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