Microscopic Creep and Damage of γ-γ'Two-phase Nickel-base Superalloy under Elevated-temperature
ZHANG Ke-Shi;Yun-Qiang GUO;Lin LIU
广西南宁市大学路100号
Cite this article:
ZHANG Ke-Shi; Yun-Qiang GUO; Lin LIU. Microscopic Creep and Damage of γ-γ'Two-phase Nickel-base Superalloy under Elevated-temperature. Acta Metall Sin, 2007, 43(9): 961-967 .
Abstract The microscopic creep and damage evolution under elevated-temperature tension was simulated using crystalline thermo viscoplastic constitutive description for the γ-matrix and γ'-precipitates respectively. In the present paper, the following contents were introduced: (1) a Representative Volume Element(RVE) of Voronoi aggregate with randomly spatial arrangement of γ-γ' phases; (2) a single crystalline thermo viscoplastic constitutive relation associated with micro-void damage description and corresponding iterative algorithm; (3) damage evolution of γ-γ' superalloy at micro scale under elevated temperature; (4) comparative analysis of describing ability between two type of RVEs of Voronoi γ-γ' aggregate and roughly-periodic γ-γ' unit cell.
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