ABSTRACT

The present work quantifies the contribution of constituting phases to the strain hardening in a medium-Mn steel during Lüders deformation. The strain hardening of the ferrite matrix (∼ 46.1 MPa) is much lower than that of the austenite phase (∼ 116 MPa). The large difference of strain hardening behaviour between ferrite and austenite phases is ascribed to a martensitic transformation. Thus, the transformation-induced plasticity effect in retained austenite is the main contributor to the strain hardening during Lüders deformation of the present medium-Mn steel.

中文翻译：

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中锰钢的吕德斯变形过程中各相的应变硬化

摘要

本工作量化了Lüders变形过程中组成相对中锰钢应变硬化的贡献。铁素体基体的应变硬化（约46.1 MPa）远低于奥氏体相的应变硬化（约116 MPa）。铁素体相和奥氏体相之间的应变硬化行为差异很大，这归因于马氏体相变。因此，在残余奥氏体中由相变引起的可塑性效应是导致本发明中Mn钢的Lüders变形过程中应变硬化的主要因素。