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

图7. GH350合金应力松弛实验后TEM明场像

Fig.7. TEM bright field images of GH350 alloy after stress relaxation tests at 600 ℃, 510 MPa (a, b) and 700 ℃, 510 MPa (c, d)(a) strain contrast field around γ' particles (b) dislocation pile-up around grain boundary η phase(c) interface dislocation of intragranular η phase (d) deformation band in matrix