|About this Abstract
||2020 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials
||Synchrotron X-ray Diffraction and Computed Tomography Studies of Ultrasonic Welding Dissimilar Mg-Fe Metals
||Lianghua Xiong, Chihpin Andrew Chuang, Dileep Singh, Jian Chen, Yong Chae Lim, Zhili Feng
|On-Site Speaker (Planned)
Ultrasonic welding dissimilar metals (like magnesium and steel) combines the merits of lightweight and high strength, and has vast potential in automotive industry requiring components with cost and energy efficiency. Due to the metallurgical incompatibility between magnesium and steel, formation of intermetallic compounds and residual strain across the interface remain open questions and hinder the wider application. However, it is challenging for conventional methods, such as optical and scanning/transmission electron microscopies, to obtain three-dimensional interface structure. Here, we apply synchrotron x-ray diffraction and high-energy computed tomography to characterize the microstructure across Mg-Fe interface. New intermetallic compounds are revealed and residual strain is quantified. High-resolution 3D morphology of Mg-Fe interface is reconstructed and quantified. The results obtained will benefit producing reliable joints of dissimilar metals and validate metallurgical and mechanical modelling.