Austenite stability and heterogeneous deformation in fine-grained transformation-induced plasticity-assisted steel

作者：Ryu Joo Hyun; Kim Jeong In; Kim Hyoung Seop; Oh Chang Seok; Bhadeshia H K D H; Suh Dong Woo^*

来源：Scripta Materialia, 2013, 68(12): 933-936.

DOI：10.1016/j.scriptamat.2013.02.026

• TRIP steel
• Retained austenite
• Stability
• Heterogeneous deformation
• Digital image correlation

We report the mechanistic explanation of the variation in Luders strain in fine-grained transformation-induced plasticity-assisted steel. The austenite stability is demonstrated to have a profound influence on the Luders strain. Furthermore, it is shown unambiguously using a thermodynamic analysis that the transformation of austenite is strain-induced. The work results in a generic method of distinguishing the cause of martensitic transformation during tensile tests, given that both stresses and strains are necessarily present beyond the yield point.

• 出版日期2013-6