EFFECT OF MICROSTRUCTURE OF ALUMINIDE COATING ON HIGH-CYCLE FATIGUE PERFORMANCE OF COATING-SUPERALLOY SYSTEM
FAN Ruilin Institute of Aeronautical Materials; Beijing
Cite this article:
FAN Ruilin Institute of Aeronautical Materials; Beijing. EFFECT OF MICROSTRUCTURE OF ALUMINIDE COATING ON HIGH-CYCLE FATIGUE PERFORMANCE OF COATING-SUPERALLOY SYSTEM. Acta Metall Sin, 1991, 27(5): 54-60.
Abstract The high-cycle fatigue performance of different microstructures of aluminide coating-superalloy system has been studied at 900℃. The single phase coating of coarse equiaxial grain NiAl (β) has unfavourabie effect on fatigue life of the coating-superalloy. The fatigue life may shorten if the coating of NiAl (β) was an enrichment of coarse refractory metal grains. While an improvement can be made by dispersing numerous secondary phase particles such as extreme fine γ', quasi-σ phase and others.
1 Strang A. In: Kirman I, Marriott J B, Merz M, Sahm P R, Whittle D P eds., Behaviour of High Temperature Alloys in Aggressive Environments, London: The Metals Society, 1980: 595--613 2 Paskiet G F, Boone D H, Sullivan C P. J Inst Met (London), 1972; 100: 58--62 3 Wells C H, Sullivan C P. ASM Trans Q, 1968; 61: 149--155 4 Goward G W, Boone D H. Oxid Met, 1971; 3: 475--495 5 Goward G W, Boone D H, Giggins C S. ASM Trans Q, 1967; 60． 228--241 6 Levine S R, Caves R M. J Electrochem Soc, 1974; 121: 1051--1064 7 Pichoir R. In: Holmes D R, Rahmel A eds., Materials and Coation to Resist High Temperature Corrosion. London: Applied Science. 1978: 253--269 8 杨炳光,李永祚,范瑞麟,杨树梅.中国腐蚀与防护学报,1985;5:142-14
