Ti-Ni-Nb宽滞后记忆合金的研究进展

Recent Advances in the Study of the Ti-Ni-Nb Shape Memory Alloy with Wide Hysteresis

Ti－Ni－Nb形状记忆合金由于其较宽的相变滞后和优良的形状记忆性能，是一种很有前途的管接头和紧固件用材。本文论述了Ti－Ni－Nb合金滞后加宽的工程意义，介绍了近十年来Ti－Ni－Nb合金显微组织、马氏体相变、力学行为、应变恢复率、低温热容和机械加工特性等方面的研究进展及发展趋势。

The Ti-Ni-Nb shape memory alloy possesses a wide transformation hysteresis and excellent shape memory properties, so that it is expected to be used for pipe couplings and mechanical fasteners. The engineering significance of widening hysteresis is discussed. Recent advances in the study of this alloy are reviewed, including microstructure, martenstic transformation, mechanical behavior, strain recovery ratio, low temperature thermal capacity and machinability, etc. Future development of this alloy is also discussed.