About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond V
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Presentation Title |
MPEA Filler Design Enabling New Opportunities for Similar and Dissimilar Joining |
Author(s) |
Zhenzhen Yu, Benjamin Schneiderman, Aric Adamson, Warren Miglietti, Alexander Hansen, Aaron Wells |
On-Site Speaker (Planned) |
Zhenzhen Yu |
Abstract Scope |
Multi-principal element alloy (MPEA) fillers have the potential to address longstanding challenges for similar and dissimilar materials joining because they can accommodate a variety of elements in solid solutions. In this work, a suite of computational strategies was developed to enable design of specific MPEA chemistries with fine-tuned melting temperature ranges and chemical compatibility for several joining applications. Specific cases to be presented include (1) a 952°C-liquidus MPEA for brazing stainless steel or Inconel 718, (2) a 1098°C-liquidus MPEA for brazing nickel superalloys (e.g., Haynes 214 and Inconel 738LC), and (3) a 1060°C-liquidus MPEA with carbide powder additions to form a metal-matrix composite filler with graded thermal expansion coefficient to enable joining of Inconel 740H to silicon carbide for high operation temperatures. Take Haynes 214 for example, the MPEA filler exhibited 28% elongation of brazed thin-sheets in comparison to 18% elongation with conventional BNi-5 foils while yielding slightly higher strength. |