February 2023 Technical Meeting
Join AWS Detroit at our February 2023 Technical Meeting! During this Technical Meeting, speaker Warren Peterson will discuss Investigation of Techniques Used to Minimize Liquid Metal Embrittlement (LME) in a Production Setting. The event will also include a walk through United Technical’s shop with discussion on training, nondestructive evaluation, materials science, and engineering.
Important Details:
Date: Thursday, February 9th
Time: 5:30PM – 8PM. Doors close at 9PM.
Cost: $10 Dinner will also be provided.
Space is limited – register in advance!
About Our Speaker
Warren Peterson is the Welding Technical Director at United Technical, supervising the resistance and arc welding engineering activities and engineering lab. Previously, he has held positions at Edison Welding Institute (EWI) and Inland Steel Research Laboratories (ArcelorMittal). He is active in various AWS automotive arc and resistance welding committees and has authored more than 35 journal papers and conference reports. Warren currently serves on the AWS-Detroit executive board and chaired 2 AWS-Detroit Sheet Metal Welding Conferences (2018 & 2021). Warren is a graduate of the Ohio State University Welding Engineering program and is an expert in resistance welding processes.
Investigation of Techniques Used to Minimize LME in a Production Setting
Many studies have identified factors that can either promote or minimize liquid metal embrittlement (LME) in the resistance spot welding of Gen 3 high-strength galvanized coated steels. This study, performed at United Technical, is based on previous customer work to minimize LME in their production processes. The approaches established in this investigation have nearly eliminated LME during their prototype development phases and are now being implemented for production.
The material chosen for this study was previously found to exhibit LME in A/SP LME screening testing and subsequent weldability testing. A design of experiments (DoE) approach was used to understand the relationships between welding factors as applied to a nonstandard electrode design. Elements of these approaches may differ from standard OEM practices; however, they have been shown to be effective. This study illustrates the significance of the primary and interactive effects of welding practice on LME.