Hydrogen Embrittlement of Magnesium and Magnesium Alloys: A Review
Водородное охрупчивание магния и магниевых сплавов: обзор
2013-01-01
SCID: 54.1/6paxdu5y
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delayed hydride crackinghydrogen embrittlementhydrogen transportmagnesium alloysstress corrosion cracking
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Abstract (AI)
Magnesium and magnesium alloys are susceptible to stress corrosion cracking in various environments, including distilled water. There is compelling evidence to conclude that SCC is assisted, at least in part, by hydrogen embrittlement. This paper reviews the thermodynamics of the Mg-H system and the kinetics of hydrogen transport. Aspects of magnesium corrosion relevant to hydrogen absorption are also discussed. Crack growth mechanisms based on delayed hydride cracking, hydrogen adsorption dislocation emission, hydrogen enhanced decohesion, and hydrogen enhanced localized plasticity have been proposed and evidence for each of them is reviewed herein.
Key Findings
1
Available evidence indicates that hydrogen embrittlement contributes, at least partly, to stress corrosion cracking in magnesium materials.
2
Four proposed hydrogen-assisted crack-growth mechanisms are evaluated: delayed hydride cracking, hydrogen adsorption-induced dislocation emission, hydrogen-enhanced decohesion, and hydrogen-enhanced localized plasticity.
3
Magnesium and magnesium alloys are susceptible to stress corrosion cracking in various environments, including distilled water.
4
The review examines magnesium–hydrogen thermodynamics, hydrogen-transport kinetics, and corrosion processes relevant to hydrogen absorption.
Research Object
magnesium and magnesium alloys under stress corrosion cracking conditions
Research Subject
hydrogen embrittlement mechanisms, including hydrogen absorption and transport, and their role in stress corrosion crack growth
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2013-01-01
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