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Kotula, P.G.; Carter, C.B.; Chen, K.C.; Thoma, D.J.; Chu, F.; Mitchell, T.E.
Los Alamos National Lab., Materials Science and Technology Div., NM (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)1998
Los Alamos National Lab., Materials Science and Technology Div., NM (United States). Funding organisation: USDOE Office of Energy Research, Washington, DC (United States)1998
AbstractAbstract
[en] A multiply-faulted dipole in the C15 Laves phase of composition Nb15Cr68Ti17 has been characterized. The dislocations all lie along [011] and show no residual contrast when imaged edge-on at B = [0 bar 1 bar 1] indicating that they are edge in character. Given this, the Burgers vectors for the Shockley partials are ± 1/6[2 bar 11] and those of the stair-rods are ± 1/6[0 bar 11]. This is consistent with a g · b analysis which was performed. The stacking fault energy was determined to be 35 mJ/m2 which is higher than the experimental value of 25 mJ/m2 from NbCr2. Simulations are currently underway to understand, given the site occupancies and observed trend in stacking fault energy, whether Ti would be expected to raise the stacking fault energy of the C15 Laves phase
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1998; 9 p; Annual meeting of the Minerals, Metals and Materials Society (TMS); San Antonio, TX (United States); 15-19 Feb 1998; CONF-980202--; CONTRACT W-7405-ENG-36; ALSO AVAILABLE FROM OSTI AS DE98006298; NTIS; US GOVT. PRINTING OFFICE DEP
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Report
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Conference; Numerical Data
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