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研究了焦耳退火和等温退火对Fe73.5Cu1 Nb3Si1 3.5B9非晶丝巨应力阻抗效应的影响。实验结果表明 ,非晶合金丝经电流密度为2 6A·mm- 2 的焦耳处理后 ,其阻抗最大变化率达到 2 5 % ,灵敏度为 1 71%·MPa- 1 ;淬态样品在 5 80℃等温退火 0 5h后 ,其阻抗最大变化率达到 67% ,灵敏度为 0 85 %·MPa- 1 。这两种退火方法都可以明显改善Fe73.5Cu1 Nb3Si1 3.5B9非晶合金丝的巨应力阻抗效应 ,阻抗的最大变化率与退火过程中晶化导致的平均各向异性的改变有关 ,而灵敏度的差异是由退火方法导致材料机械性能的差异带来的
The effects of Joule annealing and isothermal annealing on the giant stress resistance of Fe73.5Cu1 Nb3Si1 3.5B9 amorphous wire were investigated. The experimental results show that the maximum rate of change of the amorphous alloy wire is 25% and the sensitivity is 1 71% · MPa-1 when the current density is 2 6A · mm-2; After isothermal annealing 0 5h, the maximum rate of change of impedance reached 67%, the sensitivity was 0 85% · MPa-1. Both annealing methods can significantly improve the giant stress impedance effect of Fe73.5Cu1Nb3Si1 3.5B9 amorphous alloy wire, the maximum rate of change of impedance is related to the change of average anisotropy caused by crystallization during annealing, while the difference of sensitivity Is caused by the difference in mechanical properties of the material caused by the annealing process