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Meeting Materials Science & Technology 2020
Symposium Advances in Zinc-coated Sheet Steel Processing and Properties
Presentation Title Role of Liquid Zn and α-Fe(Zn) on Liquid Metal Embrittlement Cracking of Resistance Spot Welded Medium Mn Steels
Author(s) Yeongdo Park, Siva Prasad Murugan, Ji-Ung Kim, Junsu Kim, Ilguk Jo
On-Site Speaker (Planned) Yeongdo Park
Abstract Scope Zn assisted liquid metal embrittlement (LME) demands investigations on the influence of Fe-Zn interaction and resulting phase composition on LME behavior. Therefore, this research aims to derive the correlation between microstructural changes such as α-Fe (Zn) and the liquid zinc fraction and LME cracks that appear during resistance spot welding of galvanized medium manganese steel. The results indicate that the LME cracking behavior during resistance spot welding was governed by the fraction of effective liquid Zn, which was a consequence of isothermal solidification owing to the thermodynamic stability of liquid Zn, the diffusivity of Zn in Fe and partitioning coefficient of liquid Zn. Moreover, LME was influenced by the breaking of α-Fe(Zn) layer, which directs the liquid Zn into the substrate steel in the welds.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Effect of Hot Press Forming on Electrochemical Properties of Galvanized Steel
Reduction of the Internal and External Oxidation of the Charge during Galvanizing under SHS Conditions
Role of Liquid Zn and α-Fe(Zn) on Liquid Metal Embrittlement Cracking of Resistance Spot Welded Medium Mn Steels
The Effect of Galvanizing Sheet Steel under SHS Conditions on the Development of Steel Microstructures
Zinc Coating Control Using a New Integrated Indicator ECP-Zn

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