Characterization of deformation-induced martensite with various AGSs upon Charpy impact loading and correlation with transformation mechanisms

Constitutive Models for the Strain Strengthening of Austenitic Stainless Steels at Cryogenic Temperatures with a Literature Review

“…The phase-transformation activation energy decreased with a decrease in temperatures. Grain boundaries provide most of the defects [38,39]. It is clarified that potential nucleation locations are required to excite and breed martensitic transformations, and then these fine grains contribute to the occurrence of martensitic transformations.…”

Influence of DIMT on impact toughness: Relationship between crack propagation and the α′-martensite morphology in austenitic steel

“…Tailoring the austenite grain size (AGS) is considered an effective method to control the DIMT product without changing the alloy chemistry. Tiamiyu et al [34] and Huang et al [35] studied austenitic stainless steels with various grain sizes and found that the grain size significantly affected the morphology of DIM under dynamic loading tests. The coarse austenite grain size resulted in the increase of the aspect ratio of α ′ -martensite.…”

“…The coarse austenite grain size resulted in the increase of the aspect ratio of α ′ -martensite. The change in α ′ -martensite morphology is attributed to the martensitic transformation sequence, which influences the boundaries that limit the growth of α ′ -martensite [35]. In the case of mechanical properties, Matsuoka et al [34] reported that coarse grains with lath-like α ′ -martensite exhibit highly desired working hardening.…”