Microalloying effects on weld metal properties ManufacturingX Lab

In steel manufacturing industries, different microalloying elements have been added for desired strength, ductility, and toughness through thermo-mechanical treatments. However in real applications after welding, the mechanical properties of weld metal can deviate significantly from the base material due to it as-solidified microstructure. The effects of microalloying elements on weld metal properties remain elusive

In this research field, atomic resolution material characterization techniques, including transmission electron microscope (TEM) and atom probe tomography (APT) are utilized to reveal the distribution, morphology, crystallography and chemistry of microalloying contained phases in weld metal. This is related to the corresponding mechanical properties using an integrated experimental and numerical approach.

This work is in collaborations with Dr. Mingjie Xu at University of California, Irvine and Dr. Qianying Shi at University of Michigan, Ann Arbor. Our industry collaborators are ArcerlorMittal and Lincoln Electric.