The effect of the γ′ morphology on stress-rupture properties of IC21 alloy at 850°C. (May 2015)

• Record Type: Journal Article
• Authors: Zhang, H.; Liang, Y. F.; Li, S. S.; Zhou, J.; Gong, S. K.
• Is Part Of: Materials research innovations. Volume 19(2015)Supplement 7
• Page Start: S98
• Page End: S101
• Publication Date: 2015-05
• Subjects: Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891715Z.0000000001567
• Languages: German
• ISSNs: 1432-8917

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>In this study, the effect of the γ′ morphology on stress-rupture properties of single crystal alloy IC21 at 850°C 500 MPa^{− 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 γ′ morphology, the dominant deformation mechanism has been changed from the shearing of the &lt; 112&gt; super-partial dislocations to the Orowan by-passing mechanism.</p> </abstract>