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

表4 热处理态合金中二次γ′相的体积分数、平均直径、平均间距以及γ与γ′相晶格错配度[16]

Table 4 Volume fraction (f), average diameter (d), and average spacing (λ) of secondary γ′ phase; and lattice mismatch of γ and γ′ phase (δ)in HT alloys[16]

Alloy f / %[16] d / nm[16] λ / nm δ / %[16] 0Hf + 0Ta 39.5 112 50 0.049 0.5Hf + 0Ta 41.5 165 52 0.087 0Hf + 2.4Ta 44.3 167 56 0.129 0.5Hf + 2.4Ta 44.8 176 59 0.138