Liquid metal embrittlement in solid-state welding of Mg/galvanized steel
Publication date
2025-06-09
Document type
Forschungsartikel
Author
Chen, Ting
Wang, Hao
Fu, Banglong
Huang, Chunjie
Shen, Tong
Suhuddin, U.F.H.
Maawad, Emad
Qin, Guoliang
Klusemann, Benjamin
Organisational unit
Publisher
Taylor & Francis
Series or journal
Materials Research Letters
ISSN
Periodical volume
13
Periodical issue
7
First page
785
Last page
792
Peer-reviewed
✅
Part of the university bibliography
✅
Language
English
Abstract
The phenomenon of liquid metal embrittlement (LME) poses safety concerns for welded joints in the manufacturing field. In present study, LME was observed in refill friction stir spot welding (refill FSSW) of dissimilar magnesium (Mg) to galvanized steel. This marks the first reported proof of evidence of LME in the field of solid-state welding. Microstructural characterization of cracks formed during the welding process revealed typical characteristics of LME, specifically the penetration and enrichment of Zn at the Mg alloy grain boundaries and the formation of a liquefied phase. Tensile tests of Zn-coated Mg alloy were conducted at elevated temperatures to validate the LME phenomenon in refill FSSW and to identify the temperature range in which LME occurs. Based on these observations, a mechanism of LME formation for the Mg-Zn system in refill FSSW is proposed. Additionally, strategies to prevent LME are suggested and experimentally validated.
Description
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/)
Version
Published version
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