Effects of martensite morphology and tempering on dynamic deformation behavior of dual-phase steels

被引：43

作者：

Lee, HS ^{[1
]}

Hwang, B

Lee, S

Lee, CG

Kim, SJ

机构：

[1] Pohang Univ Sci & Technol, Ctr Adv Aerosp Mat, Pohang 790784, South Korea

[2] Pohang Univ Sci & Technol, Mat Sci & Engn Dept, Pohang 790784, South Korea

[3] Korea Inst Machinery & Mat, Dept Mat Proc, Chang Won 641010, South Korea

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2004年 / 35A卷 / 08期

关键词：

D O I：

10.1007/s11661-006-0217-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of martensite morphology and tempering on the quasistatic and dynamic deformation behavior of dual-phase steels were investigated in this study. Dynamic torsional tests were conducted on six steel specimens, which had different martensite morphologies and tempering conditions, using a torsional Kolsky bar, and then the test data were compared via microstructures, tensile properties, and fracture mode. Bulky martensites were mixed with ferrites in the step-quenched (SQ) specimens, but small martensites were well distributed in the ferrite matrix in the intermediate-annealed (IA) specimens. Under a dynamic loading condition, the fracture mode of the SQ specimens was. changed from cleavage to ductile fracture as the tempering temperature increased, whereas the IA specimens showed a ductile fracture mode, irrespective of tempering. These phenomena were analyzed in terms of a rule of mixtures applied to composites, microstructural variation, martensite softening and carbon diffusion due to tempering, and adiabatic shear-band formation.

引用

页码：2371 / 2382

页数：12

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