WE Sem & Colloq: "Solid-state Joining of Carbon Fiber Composite to Magnesium Alloy"

Joining of higher specific strength materials (e.g., magnesium alloys, aluminum alloys, advanced high strength steel, and carbon fiber reinforced composite polymer) is a technical challenge to widespread of lightweight vehicle and transportation applications. Also, galvanic corrosion of dissimilar material joints is another critical issue that must be addressed as well. In this talk, recent multi-materials joining researches at Oak Ridge National Laboratory will be presented and discussed. In particular, solid-state joining process was employed for spot joining of carbon fiber composite to magnesium alloy and its joints performances were evaluated by mechanical testing. Then, the galvanic corrosion behavior of this dissimilar joint was studied by corrosion testing with different exposure times. Electron microscopic techniques were used to understand corrosion behavior of the dissimilar joints.

Dr. Yong Chae Lim is an associate R&D staff member at Materials Joining Group in the Materials Science & Technology Division at Oak Ridge National Laboratory (ORNL). Prior joining to ORNL, he earned Ph.D. at The Ohio State University (OSU) in 2011. He is currently working on various projects, including solid-state joining/ processing development for lightweight automotive applications, friction stir welding and processing of high strength materials and mechanical & metallurgical characterization for gas/oil applications. Currently, he is serving as a committee member for Shaping and Forming Committee at The Materials, Metals, and Materials Society. Also, Dr. Lim was the recipient of international scholarship from American Welding Society (AWS) at 2004 and 2006 and is currently member of AWS.