About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond IV
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Presentation Title |
Mechanical Properties of the Dual-phase Multi-Principal Element Alloy W5Mo15Fe40Ni40 |
Author(s) |
Riya Barua, Thomas John Balk |
On-Site Speaker (Planned) |
Riya Barua |
Abstract Scope |
This study focuses on the development of a dual-phase multi-principal element alloy (MPEA) W5Mo15Fe40Ni40 that exhibits a promising combination of ductility and strength potential for structural applications. Previously, the equiatomic WMoFeNi MPEA has shown apparent shear band localization leading to self-sharpening behavior. The W5Mo15Fe40Ni40 alloy was derived from the equiatomic alloy and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and nanoindentation, which confirmed the presence of a second phase embedded in the FCC matrix. This topologically close-packed μ phase contributes to the alloy's significant strain hardening behavior. The μ phase volume fraction was tailored via heat treatment, yielding a good combination of strength and ductility. Vacuum arc melting was used to fabricate bulk specimens of W5Mo15Fe40Ni40. A specially designed micro-specimen testing apparatus was used for tension testing, and Gleeble thermo-mechanical bulk compression testing was used to determine yield behavior at high temperatures over a range of strain rates. |