Carbide strengthened refractory metals

Conference · Sun Jan 10 04:00:00 EST 1993 · AIP Conference Proceedings (American Institute of Physics); (United States)

DOI:https://doi.org/10.1063/1.43078· OSTI ID:5460201

Buckman, Jr, R W ^[1]

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1. Refractory Metals Technology, P.O. Box 18415, Pittsburgh, Pennaylvania 15236 (United States)

High temperature creep strength is the primary design criterion for refractory metal alloys being considered for application in space nuclear power systems. The strength improvement exhibited by these alloys, which contain a reactive metal component and to which intentional carbon additions have been made, is generally attributed to a reactive metal carbide precipitate. One exception is the tantalum base alloy ASTAR-811C, where only the dimetal carbide of tantalum has been detected. Melting, primary and secondary working, and heat treatment operations have all been shown to influence the carbide precipitate size/morphology. This paper discusses the various carbide strengthened Group Va and VIa refractory metal alloys, and presents mechanical property data which illustrates the influence of: alloy base, [bold reactive] [bold metal]/[bold carbon] atom ratio, and thermal mechanical processing history, on high temperature creep properties.

• OSTI ID: 5460201
• Report Number(s): CONF-930103--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 271:1
• Country of Publication: United States
• Language: English

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