Hydrogen effects on dislocation activity in austenitic stainless steel
作者： K NIBUR , D BAHR , B SOMERDAY
DOI: 10.1016/J.ACTAMAT.2006.02.007
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摘要: Abstract Nanoindentation has been used to study the effect of dissolved hydrogen on deformation small volumes for austenitic stainless steel 21Cr–6Ni–9Mn. Hydrogen reduces load at which dislocations are nucleated and it is further shown that this likely due reducing shear modulus. Slip steps around indentations have imaged increases slip planarity. This attributed as cause increase in measured hardness. Additionally, regions resulted primarily from a single plane prior charging exhibited two different planes after charging. suggests may lower stress necessary glide second plane. The planarity activation additional consistent with hydrogen-enhanced localized plasticity mechanism.
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