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<p>The influence of transverse magnetic field (MF) on the microstructure and mechanical properties of Ti6321 alloy welding joints is studied. The influence of MF on welding arc and molten pool flow is explored by combining simulation and experiment. Adding transverse MF increases the width of fusion and depth of fusion of the joint, and the size of <i>α’</i> in the joint is significantly reduced. Applying MF during welding can enhance the microhardness of the WZ, which increases from 293.6 HV to 310.7 HV. Applying MF during welding can increase the tensile strength of the WZ, which increases from 845.1&#xa0;MPa to 883.3&#xa0;MPa, and the plasticity increases from 12.9 to 13.5%. The addition of alternating MF produces Lorentz force, which causes the arc to oscillate periodically, promoting side wall fusion. The Lorentz force causes the molten pool to flow, increasing convection and reducing temperature gradient. This refines the grains and reduces the residual stress of the WZ, improving the tensile strength and elongation of the WZ.</p> Graphical Abstract <p></p>

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Mechanism Study on Microstructure and Properties of Ti6321 Alloy Welding by Transverse Magnetic Field

  • 期刊论文

  • 发表日期：

    2025年3月18日

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  • Laifa Ding,
  • Zheng Zhang,
  • Zhibin Zeng,
  • Binhao Qin,
  • Khaskin Vladyslav,
  • Lijia Chen,
  • Yupeng Zhang,
  • Haiyan Wang

摘要

The influence of transverse magnetic field (MF) on the microstructure and mechanical properties of Ti6321 alloy welding joints is studied. The influence of MF on welding arc and molten pool flow is explored by combining simulation and experiment. Adding transverse MF increases the width of fusion and depth of fusion of the joint, and the size of α’ in the joint is significantly reduced. Applying MF during welding can enhance the microhardness of the WZ, which increases from 293.6 HV to 310.7 HV. Applying MF during welding can increase the tensile strength of the WZ, which increases from 845.1 MPa to 883.3 MPa, and the plasticity increases from 12.9 to 13.5%. The addition of alternating MF produces Lorentz force, which causes the arc to oscillate periodically, promoting side wall fusion. The Lorentz force causes the molten pool to flow, increasing convection and reducing temperature gradient. This refines the grains and reduces the residual stress of the WZ, improving the tensile strength and elongation of the WZ.

Graphical Abstract