Zhenzhen Yu Benjamin Schneiderman¹

¹ George S. Ansell Department of Metallurgical and Materials Engineering,

Colorado School of Mines, Golden, CO 80401

EXTENDED ABSTRACT: In almost every manufacturing sector, challenges exist in joining dissimilar materials due to the mismatches in their thermal physical properties and chemical incompatibility; these challenges are exacerbated as component and system designs demand ever-increasing performance and interest in additive manufacturing of advanced multi-material structures continues to grow. A promising approach to prevent the detrimental reactions at the dissimilar joint interface is to place a difiusion barrier between the base metals. Meanwhile, a ductile interlayer is needed to accommodate the themally induced stress due to the difference in thermal expansion of the base materials. Multi-principal elements alloys (MPEA) have a vast compositional space available. Their tendency to form entropy-stabilized, simple solid solution phases, and to exhibit composition-dependent sluggish diffusion characteristics, make them potential candidates as filler metals for similar and dissimilar joining. In this presentation, science-based high-throughput computational composition design methodologies will be discussed, which can effectively accelerate the interlayer alloy design, which will enable dissimilar joining of incompatible materials with optimized performance (e.g., quality, weight, cost, and productivity) fbr a wide range of applications in automobile, aerospace, and power generation industries.

Keywords: High entropy alloy; multi-principal elements alloy; joining; Multi-material structures