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Effect of Rotation Relationship Between γ Grains on Compatibility of Deformation of Ti-A1 Alloys

Published online by Cambridge University Press:  22 February 2011

M. A. Morris
Affiliation:
Institute of Structural Metallurgy, University of Neuchatel, Av. Bellevaux 51, 2000 Neuchatel, Switzerland
J Luster
Affiliation:
Institute of Structural Metallurgy, University of Neuchatel, Av. Bellevaux 51, 2000 Neuchatel, Switzerland
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Abstract

The specific rotation relationships between adjacent γ grains have been measured in an alloy of composition Ti-47.5Al-2.5Cr consisting of lamellar and equiaxed distributions of γ grains in which the α2 phase was distributed as long lamellae or smaller globules respectively. Detailed analyses of active slip systems have been carried out by TEM observations of deformed samples and from these, the effect that specific rotations between γ grains have on the compatibility of deformation across adjacent grains has been discussed. Theoretical calculations of the geometric compatibility factor characterising the best slip transfer across adjacent grains have been used and compared to the experimental results. It has been possible to deduce the role played by the type of orientation relationship between grains in producing active deformation systems that allow the maximum compatibility of deformation.

Type
Research Article
Copyright
Copyright © Materials Research Society 1995

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