The Effect of Applied Stress of the Decomposition Cu-15Ni-8Sn Spinodal Alloy


The effect of stress on spinodal decomposition in Cu-15Ni-8Sn alloy was investigated at various temperatures and stresses. As the aging temperature approached the coherent spinodal temperature about 500°C, the anisotropy among the three equivalent <100> modulations of the stress aged specimens became pronounced. The wavelength of the [001] modulation along the tensile stress axis was smaller than that of the [100] or [010] modulation perpendicular to the stress axis. TEM diffraction patterns also showed the anisotropy effect of the applied stress to the composition modulation. A theoretical model based on micromechanics concepts was employed to explain the experimental results.

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Correspondence to S. Ahn.

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Ahn, S., Tsakalakos, T. The Effect of Applied Stress of the Decomposition Cu-15Ni-8Sn Spinodal Alloy. MRS Online Proceedings Library 21, 539–547 (1983).

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