|About this Abstract
||1st World Congress on High Entropy Alloys (HEA 2019)
||High Entropy Alloys 2019
||Vaporizing Foil Actuator Welding of Equimolar CrCoNi—weld Zone Structure and Joint Strength Characterization
||Blake D. Barnett, Connor Slone, Anupam Vivek, Michael Mills, Glenn Daehn
|On-Site Speaker (Planned)
||Blake D. Barnett
Medium-entropy alloys (MEA’s) such as equimolar CrCoNi have shown promise of exceptional mechanical performance with good phase stability over a wide range of operating conditions. Solid-state processing technologies offer a manufacturing route for medium and high-entropy alloys that preserve microstructures and mechanical properties for enhanced performance compared to traditional thermomechanical processing techniques. Vapoirzing Foil Actuator Welding (VFAW) has been demonstrated to create solid-state welds with no changes in the phases present or production of heat-affected zones across a wide range of similar and dissimilar material couples. VFAW was utilized to form nominally solid-state autogenous CrCoNi welds, which exhibited interfacial grain refinement, as-welded ultimate tensile strength of 1.34 GPa in lap shear samples, with minimal post-weld elemental segregation. Peel testing and fractography also support failure stresses on the order of base material strength with ductile rupture failure modes.