服役条件下镍基高温合金应力松弛微观机制

江河,董建新,张麦仓,姚志浩,杨静

Stress Relaxation Mechanism for Typical Nickel-Based Superalloys Under Service Condition

He JIANG,Jianxin DONG,Maicang ZHANG,Zhihao YAO,Jing YANG

表1 实验用合金化学成分

Table 1 Nominal chemical compositions of alloys used in present work (mass fraction / %)

Alloy Co Cr Mo Ti Al Nb Ta W C Fe Ni GH4169 - 19.00 3.00 1.00 0.50 5.30 - - 0.05 18.20 Bal. GH4169D 8.98 19.12 2.81 0.75 1.65 5.51 - - 0.039 9.50 Bal. GH4738 12.90 19.00 4.42 2.90 1.45 - - - 0.04 - Bal. GH350 24.77 16.90 2.99 2.20 1.08 1.20 3.95 1.97 <0.02 - Bal.