High-speed Tensile Deformation Behavior of 1 GPa-grade TRIP-aided Multi-phase Steels

被引：3

作者：

Tsuchida, Noriyuki ^{[1
]}

Ohkura, Satoshi ^{[2
]}

Tanaka, Takaaki ^{[3
]}

Toji, Yuki ^{[3
]}

机构：

[1] Univ Hyogo, Grad Sch Engn, 2167 Shosha, Himeji, Hyogo 6712280, Japan

[2] Univ Hyogo, Kobe, Hyogo, Japan

[3] JFE Steel Corp, Steel Res Lab, Tokyo, Japan

来源：

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN | 2017年 / 103卷 / 10期

关键词：

TRIP; deformation-induced martensitic transformation; strain rate; high speed deformation; TRIP-aided multi-phase steel; TRANSFORMATION-INDUCED PLASTICITY; STRAIN-INDUCED TRANSFORMATION; AUSTENITIC STAINLESS-STEEL; KOCKS-MECKING MODEL; DUAL-PHASE STEEL; RETAINED AUSTENITE; 0.4C-1.5SI-0.8MN STEEL; MECHANICAL-PROPERTIES; NEUTRON-DIFFRACTION; MICROSTRUCTURE;

D O I：

10.2355/tetsutohagane.TETSU-2017-044

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

High-speed deformation behavior and their strain rate dependence on mechanical properties of 1 GPa-grade TRIP-aided multi-phase (TRIP) steels were studied. The strain rate range in this study was between 3.3x 10(-6 )and 10(3) s(-1), and the effect of retained austenite (gamma(R)) shapes on TRIP effect in the 1 GPa-grade TRIP steel was also focused on. The effects of strain rate on tensile strength and flow stress in the TRIP steels were small whereas that on uniform elongation was large. The strain rate dependences on tensile strength and uniform elongation in the TRIP steels were more closely to those of the metastable austenitic stainless steels than the conventional TRIP and dual-phase steels. The 1 GPa-grade TRIP steel with the gamma(R) shape of needle-like showed better tensile properties and absorbed energy in the present strain rate range. The volume fraction of gamma(R) more than 20 % and the matrix microstructure of martensite seem to be important factors in the high-strength TRIP steels.

引用

页码：597 / 605

页数：9

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