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Heldmann, Alexander; Hoelzel, Markus; Hofmann, Michael; Gan, Weimin; Schmahl, Wolfgang W.; Griesshaber, Erika; Hansen, Thomas; Schell, Norbert; Petry, Winfried (October 2019): Diffraction-based determination of single-crystal elastic constants of polycrystalline titanium alloys. In: Journal of Applied Crystallography, Vol. 52, No. 5: pp. 1144-1156
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Abstract

Single-crystal elastic constants have been derived by lattice strain measurements using neutron diffraction on polycrystalline Ti-6Al-4V, Ti-6Al-2Sn-4Zr-6Mo and Ti-3Al-8V-6Cr-4Zr-4Mo alloy samples. A variety of model approximations for the grain-to-grain interactions, namely approaches by Voigt, Reuss, Hill, Kroener, de Wit and Matthies, including texture weightings, have been applied and compared. A load-transfer approach for multiphase alloys was also implemented and the results are compared with single-phase data. For the materials under investigation, the results for multiphase alloys agree well with the results for single-phase materials in the corresponding phases. In this respect, all eight elastic constants in the dual-phase Ti-6Al-2Sn-4Zr-6Mo alloy have been derived for the first time.