镍钛形状记忆合金管材的研究进展

镍钛形状记忆合金管材因为具有良好的形状记忆效应和超弹性而在工程领域得到了广泛的应用.文章总结了国内外众多学者的研究成果,系统介绍了镍钛形状记忆合金管材的加载力学行为、塑性成形方法和典型工程应用.镍钛形状记忆合金管材在单向拉伸加载、单向扭转加载以及拉伸扭转复合加载方式下表现出了不同的力学行为.奥氏体镍钛形状记忆合金管材在单向拉伸加载下,可以观察到明显的应力诱发马氏体螺旋带.镍钛形状记忆合金管材的塑性成形方法主要有拉拔、挤压和旋压,拉拔工艺仍是目前生产镍钛形状记忆合金管材的主要手段.镍钛形状记忆合金管材的典型工程应用主要有生物医用支架和管接头.镍钛形状记忆合金管材在科学研究和工程应用方面仍具有广阔的发展空间.

Recent research of nickel-titanium shape memory alloy tube

Nickel-Titanium shape memory alloy tube is widely applied in the engineering fields because of excellent shape memory effect and perfect superelasticity.In this paper,according to the scientific achievements of domestic and overseas researchers,Nickel-Titanium shape memory alloy tube is systematically introduced in terms of mechanical behavior,plastic deformation and typical engineering application.Nickel-Titanium shape memory alloy tube exhibits different mechanical behaviors in the cases of uniaxial tension loading,uniaxial torsion loading as well as combined tension and torsion loading.Stress-induced martensitic bands are observed on austenitic Nickel-Titanium shape memory alloy tube which is subjected to uniaxial tension loading.Nickel-Titanium shape memory alloy tube is mainly manufactured by means of plastic deformation methods,such as drawing,extrusion and spinning.Drawing remains the main approach to producing Nickel-Titanium shape memory alloy tube.Nickel-Titanium shape memory alloy tube is typically applied to biomedical stent and pipe couplings in the engineering fields.Nickel-Titanium shape memory alloy tube remains a promising candidate for scientific research and engineering application.