Partially-recrystallized, Nb-alloyed TWIP steels with a superior strength-ductility balance

被引：31

作者：

Gwon, Hojun ^{[1
]}

Kim, Jin-Kyung ^{[1
]}

Jian, Bian ^{[2
]}

Mohrbacher, Hardy ^{[3
]}

Song, Taejin ^{[4
]}

Kim, Sung-Kyu ^{[4
]}

De Cooman, Bruno C. ^{[1
]}

机构：

[1] Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Pohang 37673, South Korea

[2] CBMM Asia PTE Ltd, Singapore 049315, Singapore

[3] NiobelCon Bvba, B-2970 Schilde, Belgium

[4] POSCO, Tech Res Labs, Steel Prod Res Grp, Gwangyang 57807, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2018年 / 711卷

关键词：

Nb micro-alloying; TWIP steel; Mechanical properties; Recovery annealing; INDUCED PLASTICITY STEELS; HIGH-MANGANESE STEEL; MECHANICAL-PROPERTIES; MICROALLOYED STEEL; TRIP/TWIP STEELS; HEAT-TREATMENT; DEFORMATION; MICROSTRUCTURE; PRECIPITATION; BEHAVIOR;

D O I：

10.1016/j.msea.2017.11.012

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We investigated the effect of Nb micro-alloying in the range of 0.01 to 0.1 wt% on the microstructures and mechanical properties of Fe17Mn0.6Cl.5Al (wt%) TWIP steel. EBSD analysis shows that the Nb addition retards recrystallization in both the hot-rolled steels and cold-rolled and annealed steels. The Nb addition in the cold rolled and annealed TWIP steel leads to an increase in yield strength. This phenomenon is due to a combined effect of precipitation hardening and a low degree of recrystallization. Recovery annealing of the cold-rolled TWIP steels at 650 degrees C results in a good combination of yield strength and ductility. The steels containing 0.01 wt % and 0.025 wt% of Nb show a superior combination of UTS x TE exceeding 40,000 MPa.% and yield strength higher than 800 MPa. The design of TWIP steels utilizing both precipitation hardening and partial re crystallization opens a way to develop steels with a superior combination of yield strength and ductility.

引用

页码：130 / 139

页数：10

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