Resistance Spot Welding Characteristics and High Cycle Fatigue Behavior of DP 780 Steel Sheet

被引：33

作者：

Pal, Tapan Kumar ^{[1
]}

Bhowmick, Kaushik ^{[1
]}

机构：

[1] Jadavpur Univ Met & Mat Engn, Jadavpur Kolkata 700032, W Bengal, India

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2012年 / 21卷 / 02期

关键词：

automotive; carbon/alloy steels; mechanical testing; welding;

D O I：

10.1007/s11665-011-9850-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Resistance spot welding characteristics of DP 780 steel was investigated using peel test, microhardness test, tensile shear test, and fatigue test. Tensile shear test provides better spot weld quality than conventional peel test and hardness is not a good indicator of the susceptibility to interfacial fracture. The results of high-cycle fatigue behavior of spot welded DP 780 steel under two different parameters show that at high load low cycle range a significant difference in the S-N curve and almost similar fatigue behavior of spot welds at low load high cycle range are obtained. However, when applied load was converted to stress intensity factor, the difference in the fatigue behavior between welds diminished. Furthermore, a transition in fracture mode, i.e., interfacial and plug and hole-type at about 50% of yield load is observed.

引用

页码：280 / 285

页数：6

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