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Effect of microstructure on the creep behaviour of Ti-24Al-11Nb

Sundar, RS and Sastry, DH (1996) Effect of microstructure on the creep behaviour of Ti-24Al-11Nb. In: Workshop on the Phenomena of Creep, Fatigue, and Creep-Fatigue Interactions, FEB 15-17, 1995, KALPAKKAM, INDIA.

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In this investigation, the influence of microstructure on the high temperature creep behaviour of Ti-24Al-11Nb alloy has been studied. Different microstructures are produced by devising suitable heat treatments from the beta phase field. Creep tests are conducted in the temperature range of 923-1113 K, over a wide stress range at each temperature, employing the impression creep technique. The creep behaviour is found tb be sensitive to the crystallographic texture as well as to the details of microstructure. Best creep resistance is shown when the microstructure contains smaller alpha(2) plates and a lower beta volume fraction. This can be understood in terms of the dislocation barriers offered by alpha(2) beta boundaries and the case of plastic flow in the beta phase at high temperatures.

Item Type: Conference Paper
Publisher: Indian inst metals
Additional Information: Copyright of this article belongs to Indian inst metals.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 28 Apr 2011 06:02
Last Modified: 28 Apr 2011 06:02
URI: http://eprints.iisc.ac.in/id/eprint/37130

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