Diffraction-based determination of single-crystal elastic constants of polycrystalline titanium alloys

Heldmann, Alexander; Hoelzel, Markus; Hofmann, Michael; Gan, Weimin; Schmahl, Wolfgang W.; Griesshaber, Erika; Hansen, Thomas; Schell, Norbert und Petry, Winfried (Oktober 2019): Diffraction-based determination of single-crystal elastic constants of polycrystalline titanium alloys. In: Journal of Applied Crystallography, Bd. 52, Nr. 5: S. 1144-1156

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.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Geowissenschaften > Department für Geo- und Umweltwissenschaften > Kristallographie und Materialwissenschaft
• Themengebiete: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
• ISSN: 0021-8898
• Sprache: Englisch