A physically based methodology for predicting anisotropic creep properties of Ni-based superalloys

作者：Huang, Jia; Shi, Duo-Qi^*; Yang, Xiao-Guang

来源：Rare Metals, 2016, 35(8): 606-614.

DOI：10.1007/s12598-015-0544-z

• Wilshire equations
• Anisotropic creep properties
• Ni-based superalloy
• Prediction methodology
• Creep mechanism

This paper is focused on developing suitable methodology for predicting creep characteristics (i.e., the minimum creep strain rate, stress rupture life and time to a specified creep strain) of typical Ni-based directionally solidified (DS) and single-crystal (SC) superalloys. A modern method with high accuracy on simulating wide ranging creep properties was fully validated by a sufficient amount of experimental data, which was then developed to model anisotropic creep characteristics by introducing a simple orientation factor defined by the ultimate tensile strength (UTS). Physical confidence on this methodology is provided by the well-predicted transitions of creep deformation mechanisms. Meanwhile, this method was further adopted to innovatively evaluate the creep properties of different materials from a relative perspective.

• 出版日期2016-8
• 单位北京航空航天大学