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1,2,3(
), 邱鹏程1, 刘洋1,2, 孙兵兵4, 赵海生4, 沈强1
), 邱鹏程1, 刘洋1,2, 孙兵兵4, 赵海生4, 沈强1
Microstructure and Mechanical Properties of NiTi Shape Memory Alloys by In Situ Laser Directed Energy Deposition
CHEN Fei1,2,3(), QIU Pengcheng1, LIU Yang1,2, SUN Bingbing4, ZHAO Haisheng4, SHEN Qiang1
), QIU Pengcheng1, LIU Yang1,2, SUN Bingbing4, ZHAO Haisheng4, SHEN Qiang1
图8. 不同激光能量密度下NiTi合金的压缩应力-应变曲线
Fig.8. Compressive stress-strain curves of as-built NiTi alloys (Inset shows the locally enlarged curve. Ⅰ—elastic deformation stage of twin martensite, Ⅱ—detwinning martensite stage, Ⅲ—elastic deformation stage of detwinning martensite, Ⅳ—plastic deformation stage of detwinning martensite, σc—critical stress of detwinning martensite)
