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Effect of Low-Frequency Pulse Modulation on Microstructure and Mechanical Properties of Aluminum Alloy Joints

  • Huangsheng XieEmail author
  • Zhihe Fu
  • Jiaxiang Xue
  • Li Jin
  • Min Xu
Conference paper
Part of the Transactions on Intelligent Welding Manufacturing book series (TRINWM)

Abstract

There are many ways to achieve double-pulse MIG welding. At present, two kinds of double-pulse MIG welding are widely used. One representative method is that the wire feed speed and the welding current are periodically switched at low frequency with the Kemppi-Pro enhancement and Fronius. The other representative method is the speed of wire feeding with OTC. In this paper, the strong–weak pulses and weak–strong pulses are introduced between the strong and weak pulses of the traditional double-pulse MIG welding, TP-MIGW based on the modulation of the trapezoid wave, the effects of different frequencies on the morphology, and mechanical properties of aluminum alloy joints were studied. Through experiments, it is proved that proper TP-MIGW modulation waveform can significantly reduce defects such as nonfusion and porosity of joints, and good weld formation and reliable mechanical properties of joints are obtained.

Keywords

Double-pulse MIG welding Low-frequency Trapezoid wave 

Notes

Acknowledgement

Thanks for the help of Prof. Jiaxiang Xue of the South China University of Technology in this article. Thanks for the National Science Foundation of China (51875213); the Fujian Natural Science Foundation (2018J01503,2018J01541); the Fujian Provincial Education Hall science and technology class A (JA15486); the 2015 Dongguan city to introduce third batch of innovative scientific research team project (2017360004004), and the Longyan Science and Technology Project (2017LY68).

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Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Huangsheng Xie
    • 1
    Email author
  • Zhihe Fu
    • 1
  • Jiaxiang Xue
    • 1
    • 2
  • Li Jin
    • 2
  • Min Xu
    • 2
  1. 1.Longyan UniversityLongyanChina
  2. 2.School of Mechanical and Automotive EngineeringSouth China University of TechnologyGuangzhouChina

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