高W高Ta型粉末高温合金的蠕变性能及溶质原子偏聚

白佳铭, 刘建涛, 贾建, 张义文

Creep Properties and Solute Atomic Segregation of High-W and High-Ta Type Powder Metallurgy Superalloy

BAI Jiaming, LIU Jiantao, JIA Jian, ZHANG Yiwen

图5 FGH4098和GNPM01合金在650℃、980 MPa蠕变断裂后的位错亚结构

Fig.5 Dislocation substructures of FGH4098 and GNPM01 alloys after creep rupture at 650oC and 980 MPa (a) TEM bright field (TEM-BF) image and SAED pattern (inset) of FGH4098 alloy (MT—microtwin, BD—beam direction) (b) TEM-BF image and SAED pattern (inset) of GNPM01 alloy (c) high-angle annular dark field (HAADF) image of GNPM01 alloy (left) and geometric phase analysis (right) (Superlattice extrinsic stacking fault (SESF)-like fault (two-layer complex layer faults (CSF)) was thickened by a Shockley to form three-layer microtwins, as indicated by the arrow) (d) HRTEM image of MTs in FGH4098 alloy (e) HAADF image of MTs in GNPM01 alloy