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

被引：16

作者：

Heldmann, Alexander ^{[1
]}

Hoelzel, Markus ^{[1
]}

Hofmann, Michael ^{[1
]}

Gan, Weimin ^{[2
]}

Schmahl, Wolfgang W. ^{[3
]}

Griesshaber, Erika ^{[3
]}

Hansen, Thomas ^{[4
]}

Schell, Norbert ^{[2
]}

Petry, Winfried ^{[1
]}

机构：

[1] Tech Univ Munich, Heinz Maier Leibnitz Zentrum MLZ, Lichtenbergstr 1, D-85748 Garching, Germany

[2] Helmholtz Zentrum Geesthacht, German Engn Mat Sci Ctr, Max Planck Str, D-21502 Geesthacht, Germany

[3] Ludwig Maximilians Univ Munchen, Dept Geo & Umweltwissensch, Theresienstr 41, D-80333 Munich, Germany

[4] Inst Laue Langevin, 71 Ave Martyrs, F-38042 Grenoble, France

来源：

JOURNAL OF APPLIED CRYSTALLOGRAPHY | 2019年 / 52卷

关键词：

elastic constants; elasticity; stiffness; multiphase alloys; X-RAY-DIFFRACTION; NEUTRON-DIFFRACTION; TEXTURE; BERECHNUNG; SYMMETRY; MODULI;

D O I：

10.1107/S1600576719010720

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页码：1144 / 1156

页数：13

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