长期时效对低膨胀高温合金GH2909性能的影响

徐雄, 李钊, 万志鹏, 韦康, 王涛, 张新房

Effect of Long-term Aging on Properties of Low Expansion Superalloy GH2909

XU Xiong, LI Zhao, WAN Zhipeng, WEI Kang, WANG Tao, ZHANG Xinfang

图12 GH2909合金不同温度时效2000 h后高温拉伸微观断口的形貌

Fig.12 Fractography of GH2909 alloy at 540℃ after aging for 2000 h at different temperatures (a), (b), (c) standard heat treatment； (d), (e), (f) 650℃