Open AccessThe influence of temperature on the mechanical properties of polycrystalline and single-crystalline Ni3Al
Author(s) -
Tianfeng Kuang,
Hailong Qin,
F M Liu,
Q Li,
Yu Xiong,
Haitao Gao,
Yaoyong Yi
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/838/1/012001
Subject(s) - materials science , shear modulus , crystallite , anisotropy , modulus , bulk modulus , composite material , young's modulus , single crystal , poisson's ratio , condensed matter physics , crystallography , metallurgy , poisson distribution , optics , chemistry , physics , statistics , mathematics
Because of the excellent mechanical property at high temperature, single-crystalline Ni 3 Al-based alloys, which belong to Ni-based superalloys, are widely adopted in the fields of aerospace, aviation and military. Usually, single-crystalline Ni-based alloys are bonded or welded together by polycrystalline Ni-based alloys. In this study, the Young’s modulus, shear modulus, bulk modulus, and Poisson ratio of polycrystalline Ni 3 Al at the temperature ranging from 10 °C to 850 °C were calculated according to Voigt–Reuss approximation, and the relationships between the mechanical properties and the temperatures were clarified. Moreover, the influence of temperature on the universal anisotropy index and mechanical properties of single-crystalline Ni 3 Al was evaluated. Results show that, except for Poisson ratio, the increase of temperature linearly decreases the mechanical properties of polycrystalline Ni 3 Al, while it increases the universal anisotropy index of the single-crystalline Ni 3 Al. Moreover, different with the bulk modulus, the Young’s modulus and shear modulus of single-crystalline Ni 3 Al are obvious anisotropic, and their anisotropic characteristics are quite opposite. The increasing temperature decreases both maximum and minimum values of Young’s modulus, shear modulus, and bulk modulus of single-crystalline Ni 3 Al.