原位激光定向能量沉积NiTi形状记忆合金的微观结构和力学性能

陈斐, 邱鹏程, 刘洋, 孙兵兵, 赵海生, 沈强

Microstructure and Mechanical Properties of NiTi Shape Memory Alloys by In Situ Laser Directed Energy Deposition

CHEN Fei, QIU Pengcheng, LIU Yang, SUN Bingbing, ZHAO Haisheng, SHEN Qiang

表5 不同激光能量密度下NiTi合金20 cyc循环压缩的形状记忆效应 (%)

Table 5 Shape memory effects of as-built NiTi alloys under 20 cyc compression with different laser energy densities

E / (J·mm-2) εrec εtot εSME η 20.0 8.383 3.617 3.190 88.2 21.7 7.390 4.610 3.937 85.4 23.3 6.022 5.978 4.729 79.1 25.0 6.510 5.490 4.052 73.8