Deformation mechanism for high temperature creep of a directionally solidified nickel-base superalloy

Journal Article · Fri Sep 04 04:00:00 EDT 1998 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(98)00255-3· OSTI ID:665236

Yuan, C ^[1]; Guo, J T; Wang, S H ^[1]; Yang, H C ^[2]

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1. Chinese Academy of Sciences, Shenyang (China)
2. Northeastern Univ., Shenyang (China). School of Materials and Metallurgy

Modern nickel-base superalloys, which contain a high volume fraction of hard cubical {gamma}{prime} precipitates embedded coherently in a softer {gamma} matrix, are used as turbine blade material due to their good resistance to creep deformation at high temperature. In this present study, the authors will analyze the relationship between the steady-state creep rate and the applied stress of DZ17G, a modern DS cast nickel-base superalloy used for producing turbine blades and vanes for aeroengine applications. On the basis of TEM observations and calculations of the threshold stress for different deformation mechanism, the authors finally propose the deformation mechanism for creep of DZ17G superalloy at high temperature.

• OSTI ID: 665236
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 7 Vol. 39; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
CHEMICAL COMPOSITION
CREEP
MATHEMATICAL MODELS
NICKEL BASE ALLOYS
PRECIPITATION
STRESSES
TEMPERATURE DEPENDENCE
TURBINE BLADES