Mechanical properties and microstructures of resistance spot welded DP980 steel joints using pulsed current pattern

被引：56

作者：

Sawanishi, C. ^{[1
]}

Ogura, T. ^{[2
]}

Taniguchi, K. ^{[3
]}

Ikeda, R. ^{[3
]}

Oi, K. ^{[3
]}

Yasuda, K. ^{[3
]}

Hirose, A. ^{[2
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Grad Sch Engn, Div Mat & Mfg Sci, Suita, Osaka 5650871, Japan

[3] JFE Steel Corp, Chuo Ku, Chiba 2600835, Japan

来源：

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2014年 / 19卷 / 01期

关键词：

Resistance spot welding; DP980; Pulsed current pattern; Cross tensile test; Tear test; In situ observation; Microstructure; DUAL-PHASE STEEL; IN-SITU; STRENGTH; DEFORMATION; PERFORMANCE; FRACTURE; DP600; SEGREGATION; BEHAVIOR; TENSILE;

D O I：

10.1179/1362171813Y.0000000165

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Dual phase 980 MPa grade (DP980) steel sheets were resistance spot welded using a pulsed current, and the effects of the pulsed current on the strength properties of the joints were investigated. The pulsed current improved the mechanical properties of the joints in cross tensile tests. In situ observations during tear tests revealed that the ductility of the nugget was improved and that the propagation of cracks into the nugget was inhibited when the pulsed current was used. Microstructural observations and electron probe microanalysis (EPMA) of the nugget showed that the segregation of phosphorus at the nugget was reduced in the joint welded using the pulsed current, suggesting that the pulsed current improved the ductility of the nugget by altering their microstructures.

引用

页码：52 / 59

页数：8

共 36 条

[1] IN-SITU OBSERVATION OF THE PLASTIC-DEFORMATION OF POLYPROPYLENE SPHERULITES UNDER UNIAXIAL TENSION AND SIMPLE SHEAR IN THE SCANNING ELECTRON-MICROSCOPE [J].

ABOULFARAJ, M ;

GSELL, C ;

ULRICH, B ;

DAHOUN, A .

POLYMER, 1995, 36 (04) :731-742

[2]

Ambroziak A., 2011, WELDING INT, V25, P277

[3]

[Anonymous], 2001, 14272 ISO

[4] A study on heat affected zone softening in resistance spot welded dual phase steel by nanoindentation [J].

Baltazar Hernandez, Victor Hugo ;

Panda, Sushanta Kumar ;

Okita, Yasuaki ;

Zhou, Norman Y. .

JOURNAL OF MATERIALS SCIENCE, 2010, 45 (06) :1638-1647

[5] Ultimate strength and failure mechanism of resistance spot weld subjected to tensile, shear, or combined tensile/shear loads [J].

Chao, YJ .

JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME, 2003, 125 (02) :125-132

[6]

Chuko WL, 2002, WELD J, V81, p1S

[7] Experimental and modeling investigation of the failure resistance of Advanced High Strength Steels spot welds [J].

Dancette, S. ;

Fabregue, D. ;

Massardier, V. ;

Merlin, J. ;

Dupuy, T. ;

Bouzekri, M. .

ENGINEERING FRACTURE MECHANICS, 2011, 78 (10) :2259-2272

[8] HAZ Microstructures and Local Mechanical Properties of High Strength Steels Resistance Spot Welds [J].

Dancette, Sylvain ;

Massardier-Jourdan, Veronique ;

Fabregue, Damien ;

Merlin, Jacques ;

Dupuy, Thomas ;

Bouzekri, Merlin .

ISIJ INTERNATIONAL, 2011, 51 (01) :99-107

[9]

GOULD JE, 1994, WELD J, V73, pS67

[10] Influence of microstructure and weld size on the mechanical behaviour of dissimilar AHSS resistance spot welds [J].

Hernandez, V. H. Baltazar ;

Kuntz, M. L. ;

Khan, M. I. ;

Zhou, Y. .

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2008, 13 (08) :769-776

← 1 2 3 4 →