The effect of the gamma ' morphology on stress-rupture properties of IC21 alloy at 850 degree C

In this study, the effect of the gamma ' morphology on stress-rupture properties of single crystal alloy IC21 at 850 degree C 500MPa- 1 was investigated. Special heat treatment (HT) with different cooling procedure and holding temperature were conducted to samples before the stress-rupture test...

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Bibliographic Details
Published inMaterials research innovations Vol. 19; no. S4; pp. S98 - S101
Main Authors Zhang, H, Liang, Y F, Li, S S, Zhou, J, Gong, S K
Format Journal Article
LanguageEnglish
Published 01.05.2015
Subjects
Deformation mechanisms
Dislocations
Elongation
Heat treatment
Microstructure
Morphology
Shearing
Transmission electron microscopy
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Summary:In this study, the effect of the gamma ' morphology on stress-rupture properties of single crystal alloy IC21 at 850 degree C 500MPa- 1 was investigated. Special heat treatment (HT) with different cooling procedure and holding temperature were conducted to samples before the stress-rupture test. The longest stress-rupture life and the smallest elongation were obtained after HT3 treatment. Microstructure examination shows that micro-raft was built during intermediate temperature stress-rupture test after HT3 treatment. Moreover, transmission electron microscopy (TEM) analysis of the stress-ruptured samples reviews that with the change of the gamma ' morphology, the dominant deformation mechanism has been changed from the shearing of the < 112> super-partial dislocations to the Orowan by-passing mechanism.
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ISSN:1432-8917
1433-075X
DOI:10.1179/1432891715Z.0000000001567