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Meeting Materials Science & Technology 2019
Symposium Advances in Zinc-coated Sheet Steel Processing and Properties
Presentation Title Effect of Liquid Metal Embrittlement on Mechanical Behavior of Advanced High Strength Steel Spot Welds at Ambient and Low Temperatures
Author(s) Kayla M. Molnar, Matthew L.S. Zappulla, John G. Speer, Kip O. Findley
On-Site Speaker (Planned) Kayla M. Molnar
Abstract Scope While there is extensive research aimed at understanding and improving LME resistance, the effects of LME cracks on performance should also be considered. Previous assessment of the mechanical performance of LME cracks via tensile-shear and cross-tension tests did not indicate significant degradation for cracks smaller than 300 μm. However, due to the complex loading of spot welds in certain applications, it is necessary to test other loading modes and low temperature conditions. In the present work, the quasi-static strength of spot welded specimens from galvanized TRIP1180 steel was tested using three configurations: cross-tension, coach-peel, and flange-tensile with various LME crack lengths. Each configuration and crack size was tested at room temperature, -10, and -40°C and then compared to crack-free welds using load data and fractography. Additionally, finite element models were developed to provide insight on critical crack configurations and orientations that affect performance as a function of loading mode.
Proceedings Inclusion? Definite: At-meeting proceedings

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Application of Machine Learning to the Development of New Zn-based Coatings with Low Melting Temperature for Automotive Steels
Development of a New Grade of Galvanized Direct Hot Press Hardenable Steel
Effect of Liquid Metal Embrittlement on Mechanical Behavior of Advanced High Strength Steel Spot Welds at Ambient and Low Temperatures
Influence of Treatment Regimes in the Conditions of SHS on the Development of Steel
P3-85: The Effect of Zn-Mg Interlayer on the Microstructure and Corrosion Resistance of PVD-processed Coatings
P3-86: Effect of the Microstructure Development on Cracking Phenomena in Hot-Dip Zn-Al-Mg Alloy Coatings on IF Steel
P3-87: Obtaining Zinc Coatings on a Sheet Steel in SHS Conditions
P3-88: Control of Zinc Coatings Obtained under SHS Conditions
P3-89: Study on the Environment-friendly Coating Technology for Hot-dip Galvanized Steel Sheet with High Humidity Resistant
The Effect of Coating Process on Liquid Zn-assisted Embrittlement of TRIP Steel
The Influence of Electrode Geometry on the Liquid Metal Embrittlement Cracking in Resistance Spot Welding of Advanced High Strength Steel

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