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

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Metals and Materials International Pub Date : 2025-03-18 DOI:10.1007/s12540-025-01937-4

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

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Abstract

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

Abstract Image

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Ti6321合金横向磁场焊接组织与性能机理研究

研究了横向磁场对Ti6321合金焊接接头组织和力学性能的影响。采用仿真与实验相结合的方法，探讨了弱磁场对焊接电弧和熔池流动的影响。横向MF的加入增加了接头的融合宽度和融合深度，显著减小了接头中α′的大小。在焊接过程中施加弱磁场可以提高焊接接头的显微硬度，硬度由293.6 HV提高到310.7 HV。焊接过程中加入MF可使WZ的抗拉强度由845.1 MPa提高到883.3 MPa，塑性由12.9%提高到13.5%。交变磁场的加入产生洛伦兹力，导致电弧周期性振荡，促进侧壁融合。洛伦兹力使熔池流动，增加对流，降低温度梯度。这细化了WZ的晶粒，降低了WZ的残余应力，提高了WZ的抗拉强度和延伸率。图形抽象

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.