How oxidized grain boundaries fail

被引：106

作者：

Dugdale, Helen ^{[1
]}

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

Tarleton, Edmund ^{[1
]}

Roberts, Steve G. ^{[1
]}

Lozano-Perez, Sergio ^{[1
]}

机构：

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

来源：

ACTA MATERIALIA | 2013年 / 61卷 / 13期

基金：

英国工程与自然科学研究理事会;

关键词：

Micro-/nanoindentation; Fracture stress; Grain boundary embrittlement; Tomography; Transmission electron microscopy (TEM); STRESS-CORROSION CRACKING; FRACTURE-TOUGHNESS; STAINLESS-STEELS; NICKEL-ALLOYS; PRECIPITATION; PLASTICITY; MECHANISM; SYSTEM;

D O I：

10.1016/j.actamat.2013.05.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Macroscopic behaviour of materials is often controlled by microscopic events; this has driven interest in testing and analysing increasingly smaller features. The ability to perform mechanical tests on the micron scale, with modelling and high-resolution chemical and structural analysis on the same scale, now makes it possible to investigate in detail the mechanisms controlling one of the most complex modes of fracture: stress corrosion cracking (SCC). In this paper, through such a multifaceted approach, we show that individual grain boundaries, preferentially oxidized after exposure to simulated pressurized nuclear reactor cooling water, can be mechanically tested and their resistance to fracture quantified. These results have direct consequences in understanding the mechanisms controlling SCC propagation and initiation. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4707 / 4713

页数：7

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