|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||Elucidating the Effect of Liquid Metal Embrittlement on Fatigue Behavior in Resistance Spot Welding of Advanced High Strength Steel
||JB Jordon, Luke Brewer, Conner Cleek, Mitchell Roze, Mark Barkey
|On-Site Speaker (Planned)
In this work, we explore the cause-effect relationship between liquid metal embrittlement (LME) and fatigue behavior in resistance spot welding (RSW) of advanced high strength streel (AHSS). In AHSS, zinc is used as a coating to provide increased corrosion resistance. However, at temperatures necessary to weld AHSS coupled with the tensile stresses induced by the RSW process, the presence of the zinc can lead to significant LME. To assess the effect of LME, RSW lap-shear coupons were fabricated with various LME cracks by varying welding parameters. In addition, control coupons with no zinc coating were welded in order to provide baseline analysis. In this talk, we will present the results of the fatigue tests and post-mortem analysis. In particular, we will discuss the effect of the LME on low cycle and high cycle fatigue behavior and discuss the correlation between the LME crack size and fatigue performance.
||Planned: Supplemental Proceedings volume