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

表4 锻造态Allvac 718Plus合金经704和760 ℃长期时效后的组织参数及相应室温和高温拉伸性能[38]

Table 4 Microstructure information and corresponding room-temperatures (25 oC) and high-temperature (704 oC) tensile properties of forged Allvac 718Plus alloy after long-term thermal exposures at 704 and 760 oC[38]

Heat treatment γ′ size VF of σ 25 oC 704 oC nm % YS / MPa UTS / MPa El / % YS / MPa UTS / MPa El / % As-cast 35.5 ± 6.7 - 1156.48 1493.14 14.53 953.02 1069.00 15.23 704 oC, 100 h 35.6 ± 6.8 - 1247.95 1614.82 14.35 987.05 1124.90 16.61 704 oC, 200 h 36.5 ± 7.2 - 1236.30 1611.22 14.44 988.90 1126.05 11.57 704 oC, 500 h 39.9 ± 7.3 0.36 1217.46 1594.99 13.81 981.76 1104.97 19.34 704 oC, 1000 h 47.5 ± 8.8 1.97 1224.04 1581.43 11.78 969.42 1072.54 21.09 760 oC, 100 h 50.1 ± 8.7 - 1035.34 1410.07 17.58 848.89 0956.40 18.62 760 oC, 200 h 53.8 ± 10.6 1.14 1014.98 1384.67 13.93 806.55 0927.82 24.82 760 oC, 500 h 65.7 ± 13.9 2.63 0967.70 1346.90 11.38 766.01 0855.39 22.93 760 oC, 1000 h 83.6 ± 18.8 3.82 0855.11 1236.68 07.60 748.99 0874.90 30.35