Abstract
Measurements of the intrinsic stacking fault energy as a function of tin solute concentration are reported throughout the range of the intermediate hexagonal ζ-phase. Four different alloy compositions from 12 to 17 at. % tin were studied. Extended dislocation nodes and dislocation double ribbons were observed and measured. The stacking fault energy values obtained from measurements on these two configurations were in good agreement and indicated that the magnitude of the stacking fault energy increased linearly with solute concentration in the hcp phase. These results are compared with those from cubic α-phase Ag-Sn alloys previously reported. The dislocation configurations in the hexagonal alloys are briefly described.
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