Andreasen G, Heilman H, Krell D
Angle Orthod. 1985 Apr;55(2):120-6. doi: 10.1043/0003-3219(1985)055<0120:SCITNW>2.0.CO;2.
The purpose of this study was to measure and describe the physical properties of a recently-developed thermodynamic Nitinol alloy, type A-138, at intervals of temperature between room and body temperatures. The properties of stiffness, flexure yield strength and permanent deformation were measured, demonstrating that the working range of Nitinol A-138 is directly related to increases in temperature between 75 degrees F and 100 degrees F. As stiffness of the .017'' round A-138 Nitinol wire increases, the yield point decreases. In the loading cycle, yield points dropped from 36 degrees angular deflection at 75 degrees F to 25 degrees at 100 degrees F. In the unloading cycle, the yield point at 75 degrees F was 41 degrees of deflection, with force dropping to zero at 35 degrees; at 100 degrees F, yield point was only 12 degrees and force did not drop to zero until unloaded to 3 degrees angular deflection.
本研究的目的是在室温和体温之间的温度区间内，测量并描述一种新开发的A - 138型热动力学镍钛诺合金的物理性能。对其刚度、挠曲屈服强度和永久变形等性能进行了测量，结果表明，镍钛诺A - 138的工作范围与华氏75度至100度之间的温度升高直接相关。随着0.017英寸圆形A - 138镍钛诺丝刚度的增加，屈服点降低。在加载循环中，屈服点从华氏75度时的36度角偏转降至100度时的25度。在卸载循环中，华氏75度时的屈服点为41度偏转，力在35度时降至零；在100度时，屈服点仅为12度，力直到卸载至3度角偏转时才降至零。
