Abstract

In this paper, the effects of process parameters of Magnetic pulse welding (MPW) on the mechanical properties and microstructure of dissimilar metal joints of 6063-O and 20 steel tubes were investigated according to experiments. The experimental results show that the tensile strength of MPW joint is higher than that of the aluminium tube when the discharging energy of MPW attaches a certain value as well as the process parameters are reasonable, in which the mechanical joining was happened. Through the FEM analysis and experiments verification, the metallurgical joints were obtained with the moderate discharging energy, reasonable impact angle and radial gap. The results of micro hardness test show that the transition zone has a big change because the grain structure of joints in the interface was refined.

Highlights

  • Lightweight can reduce energy consumption and emissions of the automobile effectively, which makes a contribution to environmental protection [1]

  • Since the field shaper assisted coil can greatly improve the efficiency of the energy transfer and the service life of the coil, the field shaper assisted coil become the preferred coil device in the process of the Magnetic pulse welding (MPW)

  • The mechanical properties of joints were analyzed by peeling test and tension test, and the microstructure and the interface pattern were observed by OM and SEM

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Summary

Introduction

Lightweight can reduce energy consumption and emissions of the automobile effectively, which makes a contribution to environmental protection [1]. How to achieve the high performance of dissimilar metal combinations of aluminium alloy-steel effectively and economically is one of the hottest issues in the recent researches [2, 3]. To achieve the high performance of dissimilar metal joints, some new welding technique and welding technology are proposed to avoid the fragile and hard phases. The third metal is added during the process of diffusion welding, and solid state welding techniques is proposed [4, 5] The micro-pattern of interface and transition zone was observed and the distribution of basic elements across the transition zone was analyzed

Experimental
Mechanical properties evaluation
Microstructure analysis of the MPW joint
Conclusions

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