Abstract
Refractory complex concentrated alloys (RCCAs) have been proposed for extreme service applications due to their microstructural stability and excellent mechanical properties over a wide temperature range. However, printing MoNbTaV-based RCCAs by laser additive manufacturing can be challenging on account of the severe solidification cracking that occurs along grain boundaries (GBs), leading to poor mechanical strength. In this brief report, we describe a crack-free MoNbTaVTixCuy RCCA produced through compositional adjustment that leverages a Cu-Ti phase to suppress GB cracking. Printed and annealed specimens exhibited both good mechanical strengths andgood thermal conductivities.
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