<正> 在单向形状记忆效应(升温时记忆高温所确定的形状)基础上,采用一定的工艺,再赋于合金降温时记忆低温形状的能力,获得TiNi合金的双向形状记忆效应.它比单向记忆效应合金具有更卓越的记忆功能和更加广泛的应用性,是一
The S-lineshape measurements of Doppler-broadening of positron annihilation, which are strongly dependent on thermal cycling time, were performed for a Ti-51at.-%Ni alloy having two-way shape memory effect. As the S-parameter increased to about 80% of the maximum value, the property of the two-way shape memory effect in the alloy may be stabilized. Both microscopic and macroscopic measurements are identical. This result seems to be available not only for establishing an effective and convenient method to analyze the stability of two-way shape memory effect, but also for evaluating such microscopic positron annihilation spectroscopy as a measure of metallic material research.
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