| 5 | Effects of Ta Addition on Microstructure and Transformation Behavior of Ni-Ti Alloys显示文摘The effect of adding Ta on the changes of microstructure and Ms temperature of a dualphase shape memory alloy with compositions of (Ni51 Ti49)1 -x.Tax. and Ni50-Ti50 -g.Ta.g 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. | K.H.Wu and JL.Ma Department of Mechanical Engineering, Florida International University, Miami, FL 33174, U.S.A. | 2001 | Journal of Materials Science & Technology2001，17，1： | 0 |
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