Thermal Mechanisms of Grain Refinement in Steels: A Review

Deformation-induced martensite in austenitic stainless steels: A review

“…Moreover, the deformationinduced martensite forms gradually and will be inevitably deformed to different degrees, which also has an influence on microstructure heterogeneity and thereby on the mechanical properties [2,53]. During annealing, the following phenomena might occur [54,106]: (1) the reversion of martensite to UFG austenite, (2) the recrystallization of Fig. 12 Schematic of the martensite process applied to ASSs [54].…”

“…Moreover, the formation of martensite during deformation is responsible for the enhanced workhardening rate, the inhibition of necking, and increased uniform elongation. This is known as the transformationinduced plasticity (TRIP) effect and plays a major role in determining the mechanical properties of metastable ASSs [5,[53][54][55][56][57][58]. Furthermore, the grain refining process of cold deformation and reversion annealing is based on the formation of strain-induced martensite during deformation and its reverse transformation to fine-grained austenite during annealing, which is also known as the SIMRT process [1,2,40,54].…”

“…This is known as the transformationinduced plasticity (TRIP) effect and plays a major role in determining the mechanical properties of metastable ASSs [5,[53][54][55][56][57][58]. Furthermore, the grain refining process of cold deformation and reversion annealing is based on the formation of strain-induced martensite during deformation and its reverse transformation to fine-grained austenite during annealing, which is also known as the SIMRT process [1,2,40,54]. This method can be categorized as a martensite thermomechanical process [54], which is principally similar to the routes applied to low-carbon [59,60] and dual-phase (DP) [61][62][63][64][65] steels.…”

“…Regarding the last subject, the reversion treatment and the martensite process itself have been thoroughly overviewed [2,54]. Accordingly, the reversion annealing is briefly reviewed with emphasis on the new findings, critical points for the grain refinement process and enhancement of mechanical properties, and interesting subjects such as the annealing-induced martensitic transformation.…”

Unraveling the Effect of Deformation Temperature on the Mechanical Behavior and Transformation‐Induced Plasticity of the SUS304L Stainless Steel

“…[4][5][6][7][8][9] The occurrence of the martensitic transformation during plastic deformation can enhance the work-hardening capacity of the material, resulting in the inhibition of necking and enhancement of plasticity that is known as transformation-induced plasticity (TRIP) effect. [10] The formation of martensite and deformation structures during straining of austenitic stainless steels have been recently studied in comprehensive works by Li et al, [11,12] Huang et al, [13] Järvenpää et al, [14] and Nasiri et al [15] The extent of martensitic transformation decreases by increasing the deformation temperature and it will not happen above a specific temperature known as M d . [5][6][7][8][9] The temperature dependency of mechanical properties during tensile deformation has been the subject of several studies.…”