Strain Rate Dependent Flow Stress and Energy Absorption Behaviour of Cast CrMnNi TRIP/TWIP Steels

被引：35

作者：

Krueger, L. ^{[1
]}

Wolf, S. ^{[1
]}

Martin, S. ^{[2
]}

Martin, U. ^{[2
]}

Jahn, A. ^{[3
]}

Weiss, A. ^{[3
]}

Scheller, P. R. ^{[3
]}

机构：

[1] TU Bergakad Freiberg, Inst Mat Engn, D-09599 Freiberg, Germany

[2] TU Bergakad Freiberg, Inst Mat Sci, D-09599 Freiberg, Germany

[3] TU Bergakad Freiberg, Inst Iron & Steel Technol, D-09599 Freiberg, Germany

来源：

STEEL RESEARCH INTERNATIONAL | 2011年 / 82卷 / 09期

关键词：

energy absorption behaviour; flow stress behaviour; high strain rate testing; martensite kinetics; martensitic transformation; metastable austenitic steel; TRIP; TWIP; STACKING-FAULT ENERGY; MECHANICAL-PROPERTIES; MARTENSITE FORMATION; TRANSFORMATION; DEFORMATION; DUCTILITY;

D O I：

10.1002/srin.201100067

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Modern steel developments often use additional deformation mechanisms like the deformation induced martensitic transformation (TRIP-effect) and mechanical twinning (TWIP-effect) to enhance elongation and strength. Three high-alloyed cast CrMnNi-steels with different austenite stabilities were examined. Dependent on the austenite stability, TRIP-effect and TWIP-effect were found. A low austenite stability causes a distinctive formation of deformation induced alpha'-martensite and therefore a strong strain hardening. The increase of strain rate leads to an increase in yield strength and flow stress, but also to a counteractive adiabatic heating of the specimen. Dependent on the degree of deformation, low austenite stabilities and high strain rates lead to excellent values in specific energy absorption.

引用

页码：1087 / 1093

页数：7

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