Processing and Microstructure of Cr-Ta and Cr-Ta-Mo Composites Reinforced by the Cr2Ta Laves Phase

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The Cr-Ta alloy with an eutectic structure has a good combination of high strength and oxidation resistance at elevated temperatures up to 1200 C. It is an ideal candidate for ultrahigh-temperature applications. However, the material shows low ductility and fracture toughness at room temperature. A possible way to improve the ductility and fracture toughness is to obtain an aligned microstructure of eutectic Cr-based alloys, using a directional-solidification (DS) process, in which the feed materials with eutectic compositions are preferred. In the present work, a quantitative technique was developed to assist in monitoring and controlling the composition of the Cr-based alloys ... continued below

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Wang, DF July 29, 2002.

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The Cr-Ta alloy with an eutectic structure has a good combination of high strength and oxidation resistance at elevated temperatures up to 1200 C. It is an ideal candidate for ultrahigh-temperature applications. However, the material shows low ductility and fracture toughness at room temperature. A possible way to improve the ductility and fracture toughness is to obtain an aligned microstructure of eutectic Cr-based alloys, using a directional-solidification (DS) process, in which the feed materials with eutectic compositions are preferred. In the present work, a quantitative technique was developed to assist in monitoring and controlling the composition of the Cr-based alloys at each stage of the processing at elevated temperatures. The eutectic composition of the binary Cr-Ta alloy was determined to be Cr-9.7 at.% (atomic percent) Ta, and a drop-cast ternary Cr-9.7 at.% Ta-1.0 at.% Mo alloy was found to possess a fully eutectic structure.

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  • Other Information: PBD: 29 Jul 2002

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  • Report No.: ORNL/SUB/01-48225/01
  • Grant Number: AC05-00OR22725
  • DOI: 10.2172/814616 | External Link
  • Office of Scientific & Technical Information Report Number: 814616
  • Archival Resource Key: ark:/67531/metadc737418

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  • July 29, 2002

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  • Oct. 18, 2015, 6:40 p.m.

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  • March 31, 2016, 1:12 p.m.

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Wang, DF. Processing and Microstructure of Cr-Ta and Cr-Ta-Mo Composites Reinforced by the Cr2Ta Laves Phase, report, July 29, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc737418/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.