EFFECT OF COLD-ROLLING RATE ON TEXTURE IN Ti-Mo-Al-Zr SHAPE MEMORY ALLOY

摘要

Effect of rolling rate on texure of Ti-Mo-AI-Zr shape memory alloy was investigated using X-ray diffraction pole figure measurement and electron backscattering pattern (EBSP) analysis to optimize the thermomechanical processing. Ti-Mo-AI-Zr alloy is a candidate Ni-free shape memory alloy to replace Ti-Ni alloy in medical applications. The alloy was single phase of β before rolling and then α"-martensite was induced during the cold-rolling. Unlike the recrystallization texture in Ti-Nb alloy system, {110}β<100>β recrystallization texture of P-phase was developed by the solution-treatment especially in the specimens with the reduction rate higher than 90%. This texture has never been observed in Ti-Nb based alloys and can exhibit a larger recovery strain in both tension and compression.