Abstract Scope |
The ability to be joined and formed into complex shaped components is an important constraint for structural use of multiple-principle element alloys (MPEA). Welding is a critical fabrication process that is challenging due to its non-isothermal nature and complex chemical and physical reactions. Carefully tailored base metal microstructures and properties can change considerably, depending on the nature of the weld thermal cycle and on the alloy composition. Hence, chemistry-process-structure-property relationships in MPEAs need to be well understood, considering both fusion-based and solid-state welding processes. This talk discusses challenges such as strength reduction, formation of intermetallic compounds or weld cracking susceptibility. Results from advanced microstructural characterization techniques, physical simulation and thermodynamic and kinetic modeling tools provide some insights on how to optimize the alloy design and weld processing of MPEAs. |