Characterization of Microstructure and Mechanical Properties of Resistance Spot Welded DP600 Steel

被引：40

作者：

Ramazani, Ali ^{[1
]}

Mukherjee, Krishnendu ^{[2
]}

Abdurakhmanov, Aydemir ^{[3
]}

Abbasi, Mahmoud ^{[4
]}

Prahl, Ulrich ^{[2
]}

机构：

[1] Univ Michigan, Dept Chem Engn, Ann Arbor, MI 48109 USA

[2] Rhein Westfal TH Aachen, Dept Ferrous Met, D-52072 Aachen, Germany

[3] Rhein Westfal TH Aachen, Welding & Joining Inst, D-52072 Aachen, Germany

[4] Univ Kashan, Fac Engn, Kashan 8731751167, Iran

来源：

METALS | 2015年 / 5卷 / 03期

关键词：

resistance spot welding; dual-phase steel; microstructure; tensile-shear test; cross-tensile test; hardness map; fracture; HIGH-STRENGTH STEEL; FAILURE INITIATION; BEHAVIOR; QUANTIFICATION; MODE; SIZE; ZONE;

D O I：

10.3390/met5031704

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Resistance spot welding (RSW) as a predominant welding technique used for joining steels in automotive applications needs to be studied carefully in order to improve the mechanical properties of the spot welds. The objectives of the present work are to characterize the resistance spot weldment of DP600 sheet steels. The mechanical properties of the welded joints were evaluated using tensile-shear and cross-tensile tests. The time-temperature evolution during the welding cycle was measured. The microstructures observed in different sites of the welds were correlated to thermal history recorded by thermocouples in the corresponding areas. It was found that cracks initiated in the periphery region of weld nuggets with a martensitic microstructure and a pull-out failure mode was observed. It was also concluded that tempering during RSW was the main reason for hardness decrease in HAZ.

引用

页码：1704 / 1716

页数：13

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