Stress relaxation behavior and dimensional stability of INCONEL ® alloy 783

The stress relaxation behavior of a recently developed, low coefficient-of-thermal expansion superalloy, INCONEL ® alloy 783, 1 INCONEL and NIMONIC are trademarks of Special Metals Corporation. 1 has been studied in the temperature range from 482 to 649°C and at two different strain levels of 0.1 an...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 1999-11, Vol.271 (1), p.122-127
Main Authors: Fahrmann, M.G, Wereszczak, A.A, Kirkland, T.P
Format: Article
Language:English
Subjects:
Alloys
Applied sciences
Dimensional stability
Exact sciences and technology
INCONEL
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Other mechanical properties
Stress relaxation
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Summary:The stress relaxation behavior of a recently developed, low coefficient-of-thermal expansion superalloy, INCONEL ® alloy 783, 1 INCONEL and NIMONIC are trademarks of Special Metals Corporation. 1 has been studied in the temperature range from 482 to 649°C and at two different strain levels of 0.1 and 0.2%. These conditions are representative of bolting applications in steam turbines. The initial stress increase, observed at the lower temperatures and stresses, is correlated with dimensional instabilities upon extended exposures at the same temperatures, i.e. the volumetric shrinkage measured in situ in a dilatometer. The experimental results are discussed in the context of creep and transformation strains.
ISSN:0921-5093
1873-4936
DOI:10.1016/S0921-5093(99)00176-8