Traditional and additive manufacturing of a new Tungsten heavy alloy alternative. (June 2018)

• Record Type: Journal Article
• Authors: Bose, Animesh; Schuh, Christopher A.; Tobia, Jay C.; Tuncer, Nihan; Mykulowycz, Nicholas M.; Preston, Aaron; Barbati, Alexander C.; Kernan, Brian; Gibson, Michael A.; Krause, Dana; Brzezinski, Tomek; Schroers, Jan; Fulop, Ricardo; Myerberg, Jonah S.; Sowerbutts, Mark; Chiang, Yet-Ming; John Hart, A.; Sachs, Emanuel M.; Lomeli, Ester E.; Lund, Alan C.
• Is Part Of: International journal of refractory metals & hard materials. Volume 73(2018)
• Page Start: 22
• Page End: 28
• Publication Date: 2018-06
• Subjects: Heat resistant alloys -- Periodicals; Refractory materials -- Periodicals; Metallography -- Periodicals; Alliages réfractaires -- Périodiques; Matériaux réfractaires -- Périodiques; Métallographie -- Périodiques; Heat resistant alloys; Metallography; Refractory materials; Periodicals; Electronic journals; 669.73
• DOI: 10.1016/j.ijrmhm.2018.01.019
• Languages: English
• ISSNs: 0263-4368

Abstract

Abstract: A new class of rapid-sintering, fine-grained alloys recently developed is being commercially scaled through both traditional and additive manufacturing approaches. This paper discusses the scientific underpinnings of these new alloys and their processing, specifically for a W-based alloy as an alternative to Tungsten Heavy Alloy (WHA). This new alloy offers similar density and sintering temperatures to traditional WHA, but with a fine, thermally-stable microstructure that has the potential for higher temperature operation and significantly higher strength as compared to WHAs. The new alloy can be manufactured through established traditional approaches (e.g. press and sinter) and also through a recently developed 3D printing approach. Highlights: Novel WCr alloy with density comparable to conventional tungsten heavy alloys (WHA) Processing of WCr is by both press and sinter and the novel additive manufacturing technique bound metal deposition (BMD) WCr is solid state sintered resulting in better shape retention of 3D printed parts compared to liquid phase sintered WHAs Consolidated WCr alloy exhibits a finer microstructure compared to conventional liquid phase sintered WHAs