Uncovering the mechanism of the LME susceptibility for the galvanized and electrogalvanized DP 1180 steels

Zhou, Jiayi; Sun, Yu; Hu, Tianhan; Pan, Hua; Lei, Ming; Ding, Kai; Gao, Yulai

doi:10.1016/j.mtcomm.2024.108530

Materials Today Communications

2024

DOI: 10.1016/j.mtcomm.2024.108530

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Uncovering the mechanism of the LME susceptibility for the galvanized and electrogalvanized DP 1180 steels

Jiayi Zhou,

Yu Sun,

Tianhan Hu

et al.

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Cited by 3 publications

References 36 publications

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Deformation behavior and fracture mechanisms of 430 ferritic stainless steel after dual-phase zone annealing via quasi in-situ tensile testing

Meng,

Li,

Zhang

et al. 2025

Materials Science and Engineering: A

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Deformation behavior and fracture mechanisms of 430 ferritic stainless steel after dual-phase zone annealing via quasi in-situ tensile testing

Meng,

Li,

Zhang

et al. 2025

Materials Science and Engineering: A

View full text Add to dashboard Cite

Liquid Metal Embrittlement Susceptibility and Crack Formation of the Zn-Coated Complex Phase Steel

Hu,

Zhou,

Sun

et al. 2024

Materials

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In the resistance spot-welding (RSW) of galvanized complex phase (CP) steel, liquid metal embrittlement (LME) may occur, deteriorating the welded joint’s performance. Based on the Auto/Steel Partnership (A/SP) standard, the joints of galvanized CP steel welded with a welding current from 7.0 kA to 14.5 kA were evaluated. When the welding current increased to 11.0 kA, LME cracks began to appear. The longest type A crack was 336.1 μm, yet the longest type D crack was 108.5 μm, and did not exceed 10% of the plate thickness, which met the limitation of the A/SP standard. In light of the microstructural observation and element distribution, it was found that there existed an internal oxide layer adjacent to the surface of galvanized CP steel matrix, with the depth of about 4.1 μm. In addition, the simulation results show that the CP steel was under tensile stress throughout the RSW process, but the internal oxide layer could successfully lead to the low LME susceptibility of the Zn-coated CP steel.

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Comparative Study on the Liquid Metal Embrittlement Susceptibility of the High-Si Advanced High-Strength Steel with EG and GA Zn Coatings

Gu,

Zhou,

et al. 2024

Metals

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The Zn-coated high-Si advanced high-strength steel (AHSS) tends to suffer Zn-assisted liquid metal embrittlement (LME) during the resistance spot welding (RSW) process. In this study, the LME behaviors of electrogalvanized (EG) and galvannealed (GA) high-Si steels were comparatively investigated. The maximum lengths of the LME cracks at the shoulder and center of the spot weld were approximately 366.6 μm and 1486.5 μm, respectively, for the EG yet 137.0 μm and 1533.3 μm, respectively, for the GA high-Si steels. Additionally, all EG and GA welded joints were etched to measure the nugget size. It was found that the increased welding current could aggravate the formation tendency of the LME cracks for both the EG and GA high-Si steels. Furthermore, the statistical results revealed that the electrogalvanized high-Si AHSS exhibited a relatively higher LME susceptibility than the galvannealed high-Si AHSS. It was deemed that the internal oxidation produced during the annealing before the Zn coating was the crucial factor that led to the difference in the LME susceptibilities for the EG and GA high-Si steels.

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Uncovering the mechanism of the LME susceptibility for the galvanized and electrogalvanized DP 1180 steels

Cited by 3 publications

References 36 publications

Deformation behavior and fracture mechanisms of 430 ferritic stainless steel after dual-phase zone annealing via quasi in-situ tensile testing

Deformation behavior and fracture mechanisms of 430 ferritic stainless steel after dual-phase zone annealing via quasi in-situ tensile testing

Liquid Metal Embrittlement Susceptibility and Crack Formation of the Zn-Coated Complex Phase Steel

Comparative Study on the Liquid Metal Embrittlement Susceptibility of the High-Si Advanced High-Strength Steel with EG and GA Zn Coatings

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