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.
[1]Hill R,Rice J R.J Mech Phys Solids,1972;20:401 [2]Asaro R J,Rice J R.J Mech Phys Solids,1977;25:309 [3]MacLachlan D W,Wright L W,Gunturi S,Knowles D M. Int J Plast,2001;17:441 [4]Nouailhas D,Cailletaud G.Scr Mater,1996;34:565 [5]Nouailhas D,Lhuillier S.Compt Mater Sci,1997;9:177 [6]Busso E P,Meissonnier F T,O'Dowd N P.J Mech Phys Solids,2000;48:2333 [7]Fedelich B.Int J Plas,2002;18:1 [8]Zhang K S,Yang S J,Zhou B Z.J Aerosp Power,2004; 19:762 (张克实，杨士杰，周柏卓．航空动力学报，2004；19：762) [9]Zhang K S,Zheng C Q.Eng Fract Mech,1990;37:621 [10]Zhang K S,Wu M S,Feng R.Int J Plast,2005;21:801 [11]Group Editor of Materials Properties for Aeronautical En- gine Designing.Loose-life Handbook of Materials Proper- ties for Aeronautical Engine Designing.Beijing:Beijing Institute of Aeronautical Materials,2004 (发动机设计用材料数据编辑组．航空发动机设计用材料性能数据活页手册．北京：航空材料研究院，2004) [12]Zhou L,Li S X,Chen C R,Wang Y C,Zang Q S,Lu K. Mater Sci Eng,2003;A352:300
