论文部分内容阅读
在研制新的磁致伸缩合金时,必须遵从以下条件:具有够高的磁致伸缩特性、高的机械性能和电阻率。比Ni和Ni-4％Co合金更低的声速。在这些磁致伸缩特性中,两个参数是最重要的,即饱和磁致伸缩系数λ_s(静态磁化时样品可达到的最大相对尺寸变化)和动态电机耦合系数K(即电能与机械能之间的转换系数)。当然对磁致伸缩合金的要求并不限于这些参数,同样还包括磁敏性、锻压时的工艺性、抗疲劳性和耐蚀性。
In the development of a new magnetostrictive alloy, must comply with the following conditions: with high enough magnetostrictive properties, high mechanical properties and resistivity. Lower speed of sound than Ni and Ni-4% Co alloys. Among these magnetostrictive properties, the two parameters are the most important: the saturation magnetostriction coefficient λ_s (the maximum relative change in size that the sample can attain during static magnetization) and the dynamic motor coupling coefficient K (ie, the difference between electrical energy and mechanical energy Conversion factor). Of course, the requirements of the magnetostrictive alloy are not limited to these parameters, but also include magnetism sensitivity, processability in forging, fatigue resistance and corrosion resistance.