Selection of crack initiation locations of high cycle fatigue in high-Mn austenitic steel at 77 K
Materials Letters（2022）
Abstract
•Triple junction of grain boundaries is the preferential location for fatigue crack initiation.•Crack may initiate at twin boundaries under the shear stress.•Crack initiation of twin boundaries may be slowed down by stress relaxation caused by detwinning.
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Key words
High cycle fatigue,Metals and alloys,Triple junction,Twin boundary,Microstructure
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