<strong>Hf</strong>和<strong>Ta</strong>对镍基粉末高温合金蠕变断裂特征和性能的影响

Hf和Ta对镍基粉末高温合金蠕变断裂特征和性能的影响

张浩鹏, 白佳铭, 李新宇, 李晓鲲, 贾建, 刘建涛, 张义文

Effect of Hf and Ta on Creep Rupture Characteristics and Properties of Powder Metallurgy Ni-Based Superalloys

ZHANG Haopeng, BAI Jiaming, LI Xinyu, LI Xiaokun, JIA Jian, LIU Jiantao, ZHANG Yiwen

图8 0Hf + 0Ta和0.5Hf + 2.4Ta合金在750 ℃、580 MPa蠕变断裂后显微组织的TEM像

Fig.8 TEM images of microstructures of 0Hf + 0Ta and 0.5Hf + 2.4Ta alloys after creep rupture at 750 ^oC, 580 MPa (The yellow arrows indicate D-MTs and the green arrows indicate superlattice stacking faults (SSFs))
(a) TEM image of 0Hf + 0Ta alloy
(b) TEM image of 0.5Hf + 2.4Ta alloy
(c) high-resolution TEM image of deformation microtwins (Inset shows the corresponding fast Fourier transform (FFT))
(d) TEM image of SSFs