Testing and mesoscale modelling of hydrogen assisted cracking of magnesium

被引：26

作者：

Dietzel, W. ^{[1
]}

Pfuff, M. ^{[1
]}

Winzer, N. ^{[2
]}

机构：

[1] GKSS Forschungszentrum Geesthacht GmbH, D-21502 Geesthacht, Germany

[2] Fraunhofer Inst Werkstoffmech IWM, D-79108 Freiburg, Germany

来源：

ENGINEERING FRACTURE MECHANICS | 2010年 / 77卷 / 02期

关键词：

Constant extension rate tensile test; Fibre bundle model; Hydrogen embrittlement; Magnesium alloy; Mesoscale model; Stress corrosion cracking; STRESS-CORROSION CRACKING; ALLOYS; DIFFUSION; SCC;

D O I：

10.1016/j.engfracmech.2009.07.009

中图分类号：

O3 [力学];

学科分类号：

070301 [无机化学];

摘要：

To rationalise the results of stress corrosion cracking tests on smooth tensile specimens of a magnesium alloy, performed as constant extension rate tensile tests, a mesoscale fibre bundle model is employed in which the material being tested is represented by a bundle of parallel fibres The effect of hydrogen embrittlement oil the stress-Strain curves measured at various strain rates is simulated by assuming that the hydrogen is generated in localised corrosion pits and subsequently diffuses into the bulk. thereby reducing the strain-to-failure of individual fibres. The stress-strain curves obtained from these simulations show the same strain rate effect as was experimentally observed (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：257 / 263

页数：7

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