Abstract
The objective of this study is to investigate the influence mechanism of martensite multi-scale interfaces on the fatigue small cracks propagation behavior in super martensite stainless steel. The findings revealed that crack propagation slows during the transition from early to steady stages. Multiscale martensite interfaces can cause varying degrees of crack deflection, and cracks tend to propagate along-boundaries during the early propagation stage. Martensite lath is the basic unit that affects the fatigue performance and the behavior of small crack propagation.
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