Title :
Microstructural Evolution of a Newly Developed γ´ Strengthened Co-base Superalloy
Author :
Ping, D.H. ; Cui, C.Y. ; Gu, Y.F. ; Harada, H.
Author_Institution :
Nat. Inst. for Mater. Sci., Tsukuba
Abstract :
In this work, microstructural evolution of a Co-based superalloy with mainly γ/γ´ structure is studied. The nominal composition of the present alloy consists of Ni (27.6), Ti(12.9), Cr(8.7), Mo(0.8), Al(2.6), W(0.2) and Co(47.2 at.%). Ingots was heat-treated at 1100°C for 2 hours (followed by quenching in oil) then at 650°C for 24 hours (air cooling), and finally at 760°C for 16 hours (air cooling). The microstructural investigation was done using TEM and three-dimensional atom probe (3DAP) techniques.
Keywords :
aluminium alloys; atom probe field ion microscopy; chromium alloys; cobalt alloys; crystal microstructure; ingots; molybdenum alloys; nickel alloys; quenching (thermal); superalloys; titanium alloys; transmission electron microscopy; tungsten alloys; 1100 degC; 16 hour; 2 hour; 24 hour; 3DAP; 650 degC; 760 degC; CoNiTiCrMoAlW; TEM; gamma strengthened Co-based superalloy ingots; gamma-gamma´ structure; heat treatment; microstructural evolution; quenching; three-dimensional atom probe; Alloying; Atomic layer deposition; Chromium; Cobalt alloys; Cooling; Microstructure; Nickel alloys; Probes; Temperature; Titanium alloys;
Conference_Titel :
Vacuum Nanoelectronics Conference, 2006 and the 2006 50th International Field Emission Symposium., IVNC/IFES 2006. Technical Digest. 19th International
Conference_Location :
Guilin
Print_ISBN :
1-4244-0401-0
DOI :
10.1109/IVNC.2006.335302
