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Journal of Shanghai Jiaotong University(Science) >

2021 , Vol. 26 >Issue 6: 757 - 764

DOI: https://doi.org/10.1007/s12204-021-2328-y

Metal Welding Technology

Effect of Cu Addition on the Microstructure and Mechanical Properties of U-MIG Welds on Galvanized Steel Sheets

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  • (1. Key Laboratory of Lightweight and High Strength Structural Materials of Jiangxi Province, School of MechanicalEngineering, Nanchang University, Nanchang 330031, China; 2. Applied Materials, Inc., Santa Clara, CA 95054-3299, USA)

Received date: 2020-06-01

  Online published: 2021-12-01

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Abstract

Ultrasonic-assisted metal inert gas (U-MIG) welding experiments were performed to analyze the effectof Cu addition on the microstructure and mechanical properties of galvanized steel sheet welds, and first-principlescalculations were undertaken to predict the effect of Cu on the mechanical properties of α-Fe based structures.As shown by scanning electron microscopy analysis, Cu is conducive to the refinement and uniformity of themicrostructure in the weld zone. Energy-dispersive spectrometry data indicated the presence of Cu in the weldsafter welding with Cu powder. The elastic moduli of the welds without and with Cu powder, obtained fromnanoindentation tests, were (217.66 ± 5.11) GPa and (223.13 ± 9.12) GPa, respectively, which were close to thecalculated results. The mechanical properties of the crystal structures of α-Fe and α-Fe1.9Cu0.1 were calculatedusing Materials Studio software. Both the experimental and calculated results showed that Cu doping reducedthe bulk modulus of the weld but increased its shear modulus.

Key words： weld, Cu powder, first-principles calculations, galvanized steel sheet, microstructure, properties

Cite this article

YU Xiaokang (俞小康), YE Jia (叶佳), WU Chunxiang (吴春祥), MA Guohong∗ (马国红) . Effect of Cu Addition on the Microstructure and Mechanical Properties of U-MIG Welds on Galvanized Steel Sheets[J]. Journal of Shanghai Jiaotong University(Science), 2021 , 26(6) : 757 -764 . DOI: 10.1007/s12204-021-2328-y

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