利用应力对双程形状记忆合金中相变驱动力的制约作用,在Ni-Ti合金中实现了不需附加机构的速动相变和速动双程形状记忆效应。
The snap-action behavior of a NiTi alloy disk which is controlled by combinationof a nonlinear stress field and temperature has been studied. After treatment for two-way shapememory, all shape memory strain of snap-action finishes abruptlyat certain temperature within aintertal of less than 1ms. The results of resistance measurement and in-situ X-ray diffractionindicate that, snap-action strain is mainly resulted from snap-action β→?R transformation.
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