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

被引：0

作者：

Han Sang Lee

Byoungchul Hwang

Sunghak Lee

Chang Gil Lee

Sung-Joon Kim

机构：

[1] Pohang University of Science and Technology,the Center for Advanced Aerospace Materials

[2] Pohang University of Science and Technology,the Center for Advanced Aerospace Materials

[3] Pohang University of Science and Technology,the Materials Science and Engineering Department

[4] Korea Institute of Machinery and Materials,the Materials Processing Department

来源：

Metallurgical and Materials Transactions A | 2004年 / 35卷

关键词：

Ferrite; Martensite; Material Transaction; Carbon Diffusion; Adiabatic Shear Band;

D O I：

暂无

中图分类号：

学科分类号：

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：11

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