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Effects of Ta Addition on Microstructure and Transformation Behavior of Ni-Ti Alloys

Wu

2001Acta Scientiarum Naturalium Universitatis SunyatseniMaterials Science被引 2

摘要

The effect of adding Ta on the changes of microstructure and Ms temperature of a dualphase shape memory alloy with compositions of (Ni51Ti49)1-xTax and Ni50Ti50-yTay, were systematically studied. An optical microscope, SEM, X-ray diffraction and DSC were utilized in this work. The evolution of the microstructure as a function of Ta content was characterized. The variation of the Ni/Ti ratio in the NiTi phase plays an important role in the change of the Ms temperatures due to the addition of Ta. A pseudobinary NiTi-Ta phase diagram was proposed based on these results.

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