Lap joint of 6061 aluminum alloy sheet and DP590 steel sheet by magnetic pulse welding and characterization of its interfacial microstructure

被引：0

作者：

Itoi T. ^{[1
]}

Inoue S. ^{[2
]}

Nakamura K. ^{[2
]}

Kitta S. ^{[2
]}

Okagawa K. ^{[3
]}

机构：

[1] Department of Mechanical Engineering, Faculty of Engineering, Chiba University, 1–33 Yayoi-cho, Inage-ku, Chiba-shi, Chiba

[2] Graduate School of Engineering, Chiba University, Chiba-shi, Chiba

[3] Tokyo Metropolitan College of Industrial Technology, Shinagawa-ku, Tokyo

来源：

Keikinzoku/Journal of Japan Institute of Light Metals | 2018年 / 68卷 / 03期

关键词：

6061-T6; DP590; steel; Interface; Magnetic pulse welding; Microstructure;

D O I：

10.2464/jilm.68.141

中图分类号：

学科分类号：

摘要：

Lap joint sheets of 6061-T6/SPCC and 6061-T6/DP590 (Dual phase) steel were fabricated by magnetic pulse welding (MPW). Strong lap joints were achieved at discharge energy W of >2.0 kJ and gap length d of 1.0 mm for the 6061-T6/SPCC, and W of 3.0 kJ and d of 1.4 mm for the 6061-T6/DP590 steel, respectively. This result suggested that the high-collision speed is required for lap joint of the 6061-T6/DP590 steel compared with that of the 6061-T6/SPCC. Weld interface showed wavy joint interface and weld width of the lap joint sheets tend to increase with increasing of discharge energy for MPW. An intermediate layer consisted of FeAl, Fe2Al5 and FeAl3 was recognized at the weld interface discontinuously, due to localized melting and a subsequent high rate cooling of molten Fe and Al confined to the weld interface. Furthermore, work hardening by accumulated plastic strain and grain refinement of Al and Fe at the welded interface were recognized by SEM-EBSD. From microstructure observation, strong lap joint of the 6061-T6/DP590 steel by MPW was thought to be due to an increase in weld width, an anchor effect, and strengthening of the weld interface by work hardening and grain refinement. © 2018 The Japan Institute of Light Metals.

引用

页码：141 / 148

页数：7

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