Abstract

Convergent-beam electron diffraction (CBED) has been used to measure the variations in the lattice strains in particles and matrix in a single crystal Ni-14.5at.%-5.9at.% alloy aged at 1453 K. This technique offers a very high spatial resolution, and can be applied to obtain relative values of the lattice parameters and strains locally. The CBED results indicate that there is an inhomogeneous distribution of lattice strain in the matrix around the coherent precipitates which depends on the shape and the arrangement of the precipitates.

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