High-Temperature Flow Stress and Recrystallization Characteristics of Al-Bearing Microalloyed TWIP Steels

被引：14

作者：

Somani, Mahesh Chandra ^{[1
]}

Porter, David A. ^{[1
]}

Hamada, Atef S. ^{[2
]}

Karjalainen, L. Pentti ^{[1
]}

机构：

[1] Univ Oulu, Fac Technol, Mat Engn, Ctr Adv Steels Res, Oulu 90014, Finland

[2] Suez Univ, Fac Petr & Min Engn, Dept Met & Mat Engn, Suez, Egypt

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2015年 / 46A卷 / 11期

关键词：

HOT DEFORMATION-BEHAVIOR; INDUCED PLASTICITY STEEL; TRIP/TWIP STEELS; C-MN; PREDICTION; AUSTENITE; ENERGY; NB; COMPRESSION; KINETICS;

D O I：

10.1007/s11661-015-3112-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this study, the effects of microalloying (Nb,V) and aluminum on the constitutive flow behavior and static recrystallization (SRX) characteristics of microalloyed TWIP steels (Fe-20Mn-0.6C-Al-(Nb,V)) have been investigated under hot deformation conditions. Compression tests in a Gleeble simulator, including the double-hit technique, enabled the acquisition of flow stress and recrystallization data. These were analyzed to determine the powers of strain and strain rate as well as the activation energies of deformation and recrystallization (Q (def) and Q (rex)). Aluminum increased the flow stress and activation energy of deformation and delayed the onset of dynamic recrystallization of microalloyed TWIP steels. While microalloying with V up to 0.3 pct seems to have little or no effect on the SRX kinetics, microalloying with 0.026 pct Nb significantly slowed down the SRX rate, similarly as in the case of low C-Mn steels. Addition of high aluminum (4.9 pct) marginally retarded the SRX kinetics in comparison with the steels with low aluminum (1.5 pct), with or without microalloying with V.(C) The Minerals, Metals & Materials Society and ASM International 2015

引用

页码：5329 / 5342

页数：14

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