Effect of creep stress on microstructure of a Ni-Cr-W-Al-Ti superalloy

Journal Article · Thu Feb 15 00:00:00 EST 1996 · Scripta Materialia

DOI:https://doi.org/10.1016/1359-6462(95)00562-5· OSTI ID:194930

Doh, J M; Yoo, K K; Choi, J; Hur, S K ^[1]; Baik, H K ^[2]

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1. Korea Inst. of Science and Technology, Seoul (Korea, Republic of). Div. of Metals
2. Yonsei Univ., Seoul (Korea, Republic of). Dept. of Metallurgical Engineering

Creep stress changes the morphology and distribution of the precipitates in the precipitation-hardened alloys. It leads to the formation of precipitate free zones (PFZs) near the grain boundaries. From the microstructural observation of the creep tested specimens of a Ni-Cr-W-Al-Ti superalloy, the relation between PFZs and the amount of plastic deformation in the creep-ruptured specimen is established and the validity of the existing model is discussed based upon the experimental results.

• OSTI ID: 194930
• Journal Information: Scripta Materialia, Vol. 34, Issue 4; Other Information: PBD: 15 Feb 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL ALLOYS
CREEP
MICROSTRUCTURE
CHROMIUM ALLOYS
TUNGSTEN ALLOYS
ALUMINIUM ALLOYS
TITANIUM ALLOYS
CHEMICAL COMPOSITION
MORPHOLOGY
PRECIPITATION
GRAIN BOUNDARIES
CRACKS
CRACK PROPAGATION
DIFFUSION
GRAIN SIZE
SCANNING ELECTRON MICROSCOPY