Allvac 718Plus高温合金第二相演变与性能研究进展

唐丽婷, 郭倩颖, 李冲, 丁然, 刘永长

Advances in Secondary Phase Evolution and Performance Enhancement of Allvac 718Plus Superalloy

TANG Liting, GUO Qianying, LI Chong, DING Ran, LIU Yongchang

图7 快速凝固Allvac 718Plus合金经760 ℃、1000 h长期时效后形成的δ、η和σ相[29]

Fig.7 Bright-field TEM image showing the η phase, δ phase, and σ phase in the rapidly-solidified Allvac 718Plus alloy after the thermal exposures of 760 oC for 1000 h (a), the corresponding selected area electron diffraction (SAED) patterns (b, c), elemental maps images (d), and elemental line-scanning results from TEM-EDS spectrum (e)[29]