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六十年代初期,美国学者Buchler和Wileg发现了一组有独特形状记忆效应的合金,其化学组成为53～57％Ni,其余为Ti,属于镍钛合金。后来将镍钛丝作为矫正丝材。
In the early 1960s, American scholars Buchler and Wileg discovered a group of alloys with unique shape-memory effect, with chemical composition of 53-57% Ni and balance of Ti, belonging to nitinol. Later, nickel-titanium wire as a correction wire.