Annealing Temperature Dependence of the Tensile Behavior of 10 pct Mn Multi-phase TWIP-TRIP Steel

被引：1

作者：

Sangwon Lee

Bruno C. De Cooman

机构：

[1] Pohang University of Science and Technology,Graduate Institute of Ferrous Technology

[2] Pohang University of Science and Technology,Materials Design Laboratory

来源：

Metallurgical and Materials Transactions A | 2014年 / 45卷

关键词：

Ferrite; Austenite; Martensite; Stack Fault Energy; Dynamic Strain Aging;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In the present study, the relationship between the microstructure and the mechanical properties of Fe-10 pct Mn-3 pct Al-2 pct Si-0.3 pct C multi-phase steel was investigated. The 10 pct Mn multi-phase steel exhibits a combination of high tensile strength and enhanced ductility resulting from deformation-twinning and strain-induced transformation occurring in succession. A pronounced intercritical annealing temperature dependence of the tensile behavior was observed. The annealing temperature dependence of the retained austenite volume fraction, composition, and the grain size was analyzed experimentally, and the effect of the microstructural parameters on the kinetics of mechanical twinning and strain-induced martensite formation was quantified. A dislocation density-based constitutive model was developed to predict the mechanical properties of 10 pct Mn multi-phase steel. The model also allows for the determination of the critical strain for dynamic strain aging effect.

引用

页码：6039 / 6052

页数：13