New observations of the twinning effect and austenite stability in intercritical quenched and tempered steel with high strength

被引：6

作者：

Bai, Shao-bin ^{[1
]}

Xiao, Wen-tao ^{[1
]}

Wang, Yi-de ^{[2
]}

Li, Da-zhao ^{[3
]}

Zhuang, Zhi-hua ^{[3
]}

Zhang, Wang-gang ^{[1
]}

Liang, Wei ^{[1
]}

机构：

[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Peoples R China

[2] Taiyuan Iron & Steel Co Ltd, Taiyuan 030003, Peoples R China

[3] North Univ China, Coll Mat Sci & Engn, Taiyuan 030051, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE | 2021年 / 56卷 / 24期

关键词：

TRANSFORMATION-INDUCED PLASTICITY; MICROSTRUCTURAL CHARACTERISTICS; MECHANICAL-PROPERTIES; MN STEEL; BEHAVIOR; LUDERS;

D O I：

10.1007/s10853-021-06136-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

To optimize the formability and strength of hot-rolled Fe-10Mn-0.4C-2Al-0.6 V medium Mn steel, intercritical quenching and tempering processes were carried out. The strength of the steel was enhanced, and the Ludders platform was eliminated. The higher strength of the steel was attributed to the occurrence of a complex twinning effect, martensitic transformation and V-carbide precipitation during tensile deformation. In particular, the twin martensite structure retained after the quenching-tempering process served as another previous twin to accelerate the generation of nanomechanical twins in recrystallized austenite grain. The occurrence of transformation-induced plasticity (TRIP) of austenite with poor stability in non-recrystallized regions stimulated the TRIP and twinning-induced plasticity (TWIP) effects in austenite with high stability in recrystallized regions. Therefore, two pathways to improve the formability and optimize the mechanical properties of medium Mn steel by adjusting the quenching and tempering processes were proposed in this paper: (1) Manufacturing more martensite twin structures and (2) regulating the balance of austenite stability in both recrystallized and non-recrystallized regions.

引用

页码：13801 / 13813

页数：13

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