Advanced TEM and SEM methods applied to 3D Nano- and microstructural investigations of Ni4Ti3 precipitates in Ni-Ti (SMA)

Dominique Schryvers, Wim Tirry, Shanshan Cao

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Résumé

Two different kinds of experimental approaches yielding three-dimensional structural information on metastable semi-coherent precipitates are demonstrated. By combining high-resolution images from two independent viewing directions a full description of the strain field surrounding a nano-sized Ni4Ti3 precipitate in Ni-Ti can be obtained. The principal axes and strains correlate well with the transformation strain of the observed R-phase transformation close to the precipitate. Using a slice-and-view procedure in a FIB/SEM dual-beam instrument, a three-dimensional voxel dataset is produced from which morphological and distributional information on the same precipitates can be obtained yielding new insight into the particular transformation paths of these alloys, relevant for their functional behaviour.

langue originaleAnglais
titreSolid-Solid Phase Transformations in Inorganic Materials
EditeurTrans Tech Publications Ltd
Pages229-235
Nombre de pages7
ISBN (imprimé)9783037851432
Les DOIs
étatPublié - 2011

Série de publications

NomSolid State Phenomena
Volume172-174
ISSN (imprimé)1012-0394

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