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Mechanistic comparison between deformation-induced martensitic transformation and deformation twinning in austenitic steels.

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Title: Mechanistic comparison between deformation-induced martensitic transformation and deformation twinning in austenitic steels.
Authors: Lee, Tae-Ho1 (AUTHOR) lth@kims.re.kr, Ha, Heon-Young1 (AUTHOR), Kim, Seong Hoon1 (AUTHOR), Park, Hyung-Kwon1 (AUTHOR), Woo, Wanchuck2 (AUTHOR), Jeong, Jae-Suk3 (AUTHOR), Son, Kwang-Suk4 (AUTHOR)
Source: Materials Science & Engineering: A. Apr2026, Vol. 957, pN.PAG-N.PAG. 1p.
Subjects: Martensitic transformations, Twinning (Crystallography), Dislocation structure, Deformations (Mechanics), Austenitic steel, Material plasticity, Stress relaxation (Mechanics)
Abstract: Dislocation-mediated plasticity governing deformation-induced martensitic transformation (DIMT) and deformation twinning (DT) was investigated. We show that DIMT contributed to the strain relaxation of matrix, whereas DT to larger capacity of accommodating stress accumulation. And, their formation mechanisms could be explained by the role of dissimilar partial dislocations, Frank in DIMT and Shockley partial in DT, respectively. • The similarities and differences underlying deformation-induced martensitic transformation (DIMT) and deformation twinning (DT) were investigated. • Frank partials dominate for the formation of DIMT, whereas Shockley partials for DT. • The dissimilar types of partial dislocations are governing factors in determination of their formation mechanisms. • DIMT contributed to the strain relaxation of matrix via phase transformation. • DT contributed to larger capacity of accommodating stress accumulation due to the decrease in dislocation mean free path. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Dislocation-mediated plasticity governing deformation-induced martensitic transformation (DIMT) and deformation twinning (DT) was investigated. We show that DIMT contributed to the strain relaxation of matrix, whereas DT to larger capacity of accommodating stress accumulation. And, their formation mechanisms could be explained by the role of dissimilar partial dislocations, Frank in DIMT and Shockley partial in DT, respectively. • The similarities and differences underlying deformation-induced martensitic transformation (DIMT) and deformation twinning (DT) were investigated. • Frank partials dominate for the formation of DIMT, whereas Shockley partials for DT. • The dissimilar types of partial dislocations are governing factors in determination of their formation mechanisms. • DIMT contributed to the strain relaxation of matrix via phase transformation. • DT contributed to larger capacity of accommodating stress accumulation due to the decrease in dislocation mean free path. [ABSTRACT FROM AUTHOR]
ISSN:09215093
DOI:10.1016/j.msea.2026.149939