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形状记忆合金能恢复其在较高温度下所形成的形状。合金在较低的温度下变形后,当其处于较高的温度时,就力图马上恢复到原来的形状。这类效应是晶体结构在相变过程中形成或丧失马氏体的结果。自60年代初在美国发现钛铝基记忆合金以来,全世界的研究人员就广泛地研究了这一现象,并生产了一系列的此类合金。其中TiNi、Cu-Zn-Al和Cu-Al-Ni合金已经得到应用,作为航空引擎的管
Shape memory alloys restore their shape at higher temperatures. When the alloy is deformed at a lower temperature, it tries to immediately return to its original shape when it is at a higher temperature. This type of effect is the result of the formation or loss of martensite in the crystal structure during phase transformation. Since the discovery of titanium-aluminum-based memory alloys in the United States in the early 1960s, researchers around the world have studied this phenomenon extensively and produced a series of such alloys. Among them TiNi, Cu-Zn-Al and Cu-Al-Ni alloys have been used as aeroengine tubes