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2 不同激光能量密度下NiTi合金的EDS分析结果

Table 2 EDS results of as-built NiTi alloys with different laser energy densities

E Point in Fig.5 Atomic fraction of Ni Atomic fraction of Ti Ni∶Ti J·mm-2 % % 20.0 b1 57.4 42.6 1.34 b2 59.5 40.5 1.47 21.7 d1 49.1 50.9 0.96 d2 57.8 42.2 1.37 23.3 f1 48.6 51.4 0.95 f2 34.1 65.9 0.52 25.0 h1 48.6 51.4 0.95 h2 36.6 63.4 0.58