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

被引：17
|
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
收藏
页码：63 / 68
页数：6
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