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

fYear

2006

fDate

17-20 July 2006

Firstpage

513

Lastpage

514

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IVNC.2006.335302

Filename

4134685