An alloy containing 49 at.% aluminium was heat treated at different temperatures within the ? + ? two-phase field to get five different volume fractions of lamellar constituent. Creep studies were carried out on these samples at five different temperatures in the interval between 1023 and 1223 K, by impression creep technique using four levels of stresses at each temperature. For a given temperature and stress, steady state impression velocity decreased with increasing volume fraction of lamellar constituent. Activation energy for steady state creep increased linearly with lamellar content from 185 kJ/mol at 22 vol.% to 362 kJ/mol at 100 vol.%. The stress exponent was found to be around 1.2 in all the cases. The results show that a fully lamellar structure has a superior behaviour where creep is an important factor.

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dc.contributor.authorPrasad Rao, P.
dc.contributor.authorSwamy, K.Shivananda
dc.date.accessioned2026-02-05T11:00:35Z
dc.date.issuedEffect of microstructure on the impression creep of two-phase titanium aluminide
dc.description.abstract1995
dc.identifier.citationZeitschrift fuer Metallkunde/Materials Research and Advanced Techniques, 1995, 86, 11, pp. 760-763
dc.identifier.issn443093
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/28066
dc.publisherCarl Hanser Verlag
dc.subjectActivation energy
dc.subjectCreep
dc.subjectHeat treatment
dc.subjectMetallographic microstructure
dc.subjectPhase composition
dc.subjectStresses
dc.subjectStructure (composition)
dc.subjectTemperature
dc.subjectVelocity
dc.subjectVolume fraction
dc.subjectImpression creep
dc.subjectLamellar constituent
dc.subjectSteady state conditions
dc.subjectTwo phase titanium aluminide
dc.subjectAluminum alloys
dc.titleAn alloy containing 49 at.% aluminium was heat treated at different temperatures within the ? + ? two-phase field to get five different volume fractions of lamellar constituent. Creep studies were carried out on these samples at five different temperatures in the interval between 1023 and 1223 K, by impression creep technique using four levels of stresses at each temperature. For a given temperature and stress, steady state impression velocity decreased with increasing volume fraction of lamellar constituent. Activation energy for steady state creep increased linearly with lamellar content from 185 kJ/mol at 22 vol.% to 362 kJ/mol at 100 vol.%. The stress exponent was found to be around 1.2 in all the cases. The results show that a fully lamellar structure has a superior behaviour where creep is an important factor.

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