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9 经固溶处理后炉冷至时效温度的锻造态Allvac 718Plus在长期时效过程中γ″/γ′复合结构的演变示意图[28]

Fig.9 A qualitative model schematic illustration directly showing the evolution of γ″/γ′ coprecipitates[28] (a) all evolution process in forged Allvac 718Plus alloy during long-term thermal exposures at 705 oC (b) the evolution from γ′ to sandwich-γ″/γ′/γ″ coprecipitates (c) the evolution from sandwich-γ″/γ′/γ″ coprecipitates to partly compact-γ″/γ′ coprecipitates (d) the evolution from sandwich-γ″/γ′/γ″ coprecipitates and partly compact-γ″/γ′ coprecipitates to all compact-γ″/γ′/γ″ coprecipitates