Effect of aging temperature and martensite by volume on strain aging behaviour of dual phase steel

被引：18

作者：

Guenduez, S. ^{[1
]}

Demir, B. ^{[1
]}

Kacar, R. ^{[1
]}

机构：

[1] Zonguldak Karaelmas Univ, Karabuk Tech Educ Fac, Dept Mat, TR-78200 Karabuk, Turkey

来源：

IRONMAKING & STEELMAKING | 2008年 / 35卷 / 01期

关键词：

dual phase steels; strain aging; martensite; tensile fracture;

D O I：

10.1179/174328107X203949

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

A study has been made of the cold deformation aging susceptibility of dual phase steel with 14 and 22% martensite by volume. It was found that yield strength (YS) and ultimate tensile strength (UTS) increased with increasing testing temperature up to 200 degrees C and then decreased at 250 degrees C which indicated that static strain aging is dominant up to 200 degrees C. This aging is associated with free dislocations in the ferrite as a result of the austenite-martensite transformation, which become preferential sites for solute atom diffusion. At higher temperature (250 degrees C) a softening effect is dominant due to tempering of martensite. It was also observed that at a given aging temperature YS, UTS and Delta Y (increase in stress due to strain aging) increased with by volume of martensite.

引用

页码：63 / 68

页数：6

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