Ductility Characterization of U-6Nb and Ta-W Alloys

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We have previously evaluated the ductility behaviors of U-6Nb and pure Ta. One important observation was that both alloys have very stable necking ductility independent of test conditions. In contrast, uniform ductility varied significantly depending upon strain rates and temperatures. In general, higher strain rate and lower temperature reduce the uniform ductility. Using literature data, we have developed two dynamic ductility models to predict the ductility behaviors of pure-Ta and water-quenched U-6Nb respectively under extreme conditions. In this study we further evaluate the aging effect on U-6Nb and the W-addition effect on Ta. For U-6Nb, the objective is to determine ... continued below

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Sun, T & Cervantes, O September 15, 2006.

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We have previously evaluated the ductility behaviors of U-6Nb and pure Ta. One important observation was that both alloys have very stable necking ductility independent of test conditions. In contrast, uniform ductility varied significantly depending upon strain rates and temperatures. In general, higher strain rate and lower temperature reduce the uniform ductility. Using literature data, we have developed two dynamic ductility models to predict the ductility behaviors of pure-Ta and water-quenched U-6Nb respectively under extreme conditions. In this study we further evaluate the aging effect on U-6Nb and the W-addition effect on Ta. For U-6Nb, the objective is to determine whether or not the ductility degradation by low-temperature aging mostly measured in quasi-static condition can still be observed under dynamic loading (high strain rate) condition. For Ta-W alloys, the focus is to identify the key control parameter so that the optimal condition of high-strength/high-ductility of Ta-10W can be achieved for certain defense-related applications.

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PDF-file: 7 pages; size: 1.2 Mbytes

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  • Presented at: 27th AGING, COMPATIBILITY AND STOCKPILE CONFERENCE, Los Alamos, NM, United States, Sep 26 - Sep 28, 2006

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  • Report No.: UCRL-CONF-224461
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 929181
  • Archival Resource Key: ark:/67531/metadc899458

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  • September 15, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 23, 2016, 5:01 p.m.

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Sun, T & Cervantes, O. Ductility Characterization of U-6Nb and Ta-W Alloys, article, September 15, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc899458/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.