期刊
ENGINEERING FRACTURE MECHANICS
卷 77, 期 2, 页码 257-263出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2009.07.009
关键词
Constant extension rate tensile test; Fibre bundle model; Hydrogen embrittlement; Magnesium alloy; Mesoscale model; Stress corrosion cracking
类别
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.
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