镍基高温合金表面冲击强化机制及应用研究进展

王磊, 刘梦雅, 刘杨, 宋秀, 孟凡强

Research Progress on Surface Impact Strengthening Mechanisms and Application of Nickel-Based Superalloys

WANG Lei, LIU Mengya, LIU Yang, SONG Xiu, MENG Fanqiang

图13 WLSP处理后IN718合金表面硬化层γ″相/高密度位错复合体形态及强冲击作用下γ″相中出现的微孪晶[19]

Fig.13 Morphologies of complex structure of γ″ phase/high-density dislocation and micro-twins in γ″ phase induced by strong impact in the surface hardened layer of WLSP-treated IN718 superalloy[19] (a) morphology of complex structure of γ″ phase/high-density dislocation (b) dark field morphology of γ″ phase in Fig.13a (Blue arrows show micro-twins) (c) micro-twins in γ″ phase induced by strong impact (Blue arrows show micro-twins) (d) HRTEM image of micro-twins at the γ/γ″ interface