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Meeting Materials Science & Technology 2020
Symposium Powder Metallurgy of Light, Reactive and Other Non-ferrous Metals
Presentation Title Hot Isostatic Pressing of Niobium-based Refractory Alloy Powders
Author(s) Calvin V. Mikler, Brian Welk, Benjamin Georgin, Todd Butler, Noah Philips, Hamish L Fraser
On-Site Speaker (Planned) Calvin V. Mikler
Abstract Scope Niobium-based WC-3009 (Nb-30Hf-9W wt%) is a single-phase bcc refractory alloy designed as a candidate replacement for the still commonly utilized C-103 (Nb-10Hf-1Ti wt%) alloy. While WC-3009 exhibits superior high-temperature mechanical properties compared with C-103, fabrication is economically prohibitive, and the alloy was not employed in any capacity. In this study, pre-alloyed HDH WC-3009 and PREP C-103 powders were canned and subsequently consolidated via hot isostatic pressing (HIP). This effort was performed to identify key alloy attributes that drive processability through HIP such that higher strength Nb-based refractory alloys can be utilized. Backscattered electron (BSE) imaging and electron backscattered diffraction (EBSD) analysis revealed the degree of recrystallization and recovery substructure formation. Transmission electron microscopy (TEM) coupled with x-ray energy dispersive spectroscopy (XEDS) were employed to analyze second phase precipitation behavior and dislocation substructures. The results indicated that hot isostatic pressing is a viable method of processing high performance Nb-based refractory alloys.


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Deformation-free Refinement of Prior β Grain Size in Powder Metallurgical Titanium Alloys
Diffusion Behavior and Mechanical Properties of the Aluminum / Tungsten Metallic System
Hot Isostatic Pressing of Niobium-based Refractory Alloy Powders
Influence of Powder Characteristics, Temperature and Cooling Rate on the Development of the Properties in Ni-Superalloys Processed Using Powder Hot Isostatic Pressing
The Role of Processing and Texture on the Dynamic Mechanical Behavior of Powder Metallurgy Processed Ti-6Al-4V

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