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研究了提高形状记忆合金（ＳＭＡ）工作频率的物理方法——研制细丝。给出了拉拔细丝的工艺流程，从理论上分析了在不同的加热和冷却过程中丝径与响应速度的关系，对２种丝径的ＳＭＡ丝进行了性能对比测试。同时测定了２种丝径的ＳＭＡ的响应速度。结果表明，丝径的减小对丝的相变性能，如最大恢复应变、最大恢复应力等影响不大，但可显著提高其动作频率。
A physical approach to improve the working frequency of shape memory alloys (SMA) was developed - developing filaments. The technological process of drawing the filament is given. The relationship between the diameter and the response speed in different heating and cooling processes is theoretically analyzed. Simultaneous determination of the response speed of two kinds of SMA wire diameter. The results show that the decrease of the wire diameter has little effect on the phase transformation properties of the wire, such as the maximum recovery strain and the maximum recovery stress, but can significantly increase its operating frequency.