DD9单晶高温合金在800 ℃的高周旋弯疲劳性能
Rotary Bending High Cycle Fatigue Properties of DD9 Single Crystal Superalloy at 800 ℃
摘 要
研究了第三代单晶高温合金DD9在800 ℃的高周旋弯疲劳性能, 并用扫描电镜和透射电镜分析了其断口形貌和断裂机制。结果表明: DD9合金在800 ℃的高周旋弯疲劳性能优异; 疲劳裂纹起源于试样表面、亚表面的滑移带、氧化物、显微疏松处, 沿{111}面扩展, 断裂机制为类解理断裂, 断口上有典型的疲劳条带; 断裂后,γ′相的形状没有发生改变, 沿滑移带形成了二次裂纹,位错密度分布不均匀;位错主要在基体通道中通过交滑移扩展运动。
单晶高温合金
高周旋弯疲劳性能
断裂机制
DD9 alloy
single crystal superalloy
rotary bending high cycle fatigue property
fracture mechanism
Abstract
Rotary bending high cycle fatigue properties of the third generation single crystal superalloy DD9 were investigated at 800 ℃. SEM and TEM were used to study fracture surface morphology and fracture mechanism of the alloy. The results show that the rotary bending high cycle fatigue properties of DD9 alloy were excellent. The fatigue crack initiated slip band, oxide and microporosity at or near the surface. Crack propagated along {111} octahedral slip planes and the fracture mechanism was quasi-cleavage fracture. The γ′ phase still maintained same shape after fracture, the secondary crack formed along the slip band, and dislocation density distributed unevenly. The dislocation moved mainly by cross-slip in substrate channel.
中图分类号 TG132.3 DOI 10.11973/jxgccl201601004
所属栏目 试验研究
基金项目
收稿日期 2014/11/30
修改稿日期 2015/11/2
网络出版日期
作者单位点击查看
备注史振学(1975-), 男, 山东曲阜人, 高级工程师, 博士。
引用该论文: SHI Zhen-xue,WANG Xiao-guang,LIU Shi-zhong,LI Jia-rong. Rotary Bending High Cycle Fatigue Properties of DD9 Single Crystal Superalloy at 800 ℃[J]. Materials for mechancial engineering, 2016, 40(1): 16～19
史振学,王效光,刘世忠,李嘉荣. DD9单晶高温合金在800 ℃的高周旋弯疲劳性能[J]. 机械工程材料, 2016, 40(1): 16～19
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参考文献
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【2】史振学, 李嘉荣, 刘世忠. 一种镍基单晶高温合金组织稳定性［J］. 机械工程材料, 2013, 37(11): 82-86.
【3】史振学, 刘世忠, 李嘉荣. 镍基单晶高温合金不同角度晶界在高温氧化过程中的组织演化［J］. 机械工程材料, 2013, 37(12): 75-79.
【4】ARGENCE D, VERNAULT C, DESVALLEES Y, et al. MC-NG: A 4′ generation single crystal superalloy for future aeronautical turbine blades and vanes［C］// Superalloys.Warrendale: TMS, 2000: 829-837.
【5】WALSTON S, CETEL A, MACKAY R, et al. Joint development of a fourth generation single crystal superalloy ［C］// Superalloys. Pennsylvania: TMS, 2004: 15-24.
【6】WALSTON W S, O′HARA K, ROSS E W, et al. RenéN6: third generation single crystal superalloy［C］// Superalloys. Warrendale: TMS, 1996: 27-34.
【7】李嘉荣, 刘世忠, 史振学, 等. 第三代单晶高温合金［J］. 钢铁研究学报, 2011(增1): 337-340.
【8】SHI Z X, LI J R, LIU S Z. Effect of long term aging on microstructure and stress rupture properties of a nickel based single crystal superalloy［J］. Progress in Natural Science: Materials International, 2012,22:426-432.
【9】SHI Z X, LI J R, LIU S Z. Influence of withdrawal rate on tensile and stress rupture properties of the single crystal superalloy DD9［J］. Materials Science Forum, 2013,747/748:625-628.
【10】WANG X G, LI J R, SHI Z X, et al. Effect of solid solution heat treatment on microstructures of the third generation single crystal superalloy DD9 ［J］. Materials Science Forum, 3012, 747/748: 549-558.
【11】SHI Z X, LI J R, LIU S Z, et al. Creep properties and microstructure evolution of nickel-based single crystal superalloy at different conditions［J］. Trans Nonferrous Met Soc China, 2014,24:2536-2543.
【12】WRIGHT P K, JAIN M, CAMERON D. High cycle fatigue in a single crystal superalloy: time dependence at elevated temperature ［C］// Superalloys. Pennsylvania, TMS, 2004: 657-666.
【13】LUKAS P, KUNZ L, SVOBODA M. High cycle fatigue of superalloy single crystals at high mean stress ［J］. Materials Science and Engineering:A, 2004, 387/389: 505-510.
【14】WASSON A J, FUCHS G E. The effect of carbide morphologies on elevated temperature tensile and fatigue behavior of a modified single crystal Ni-base superalloy ［C］// Superalloys. Pennsylvania, TMS, 2008: 489-497.
【15】SHI Z X, LI J R, LIU S Z, et al. High cycle fatigue behavior of the second generation single crystal superalloy DD6 ［J］. Transaction Nonferrous Metal Society of China, 2011, 21: 998-1003.
【16】WAN J S, YUE Z F. A low-cycle fatigue life model of nickel-based single crystal superalloys under multiaxial stress state［J］. Materials Science and Engineering: A,2005,392:145-149.
【17】史振学, 李嘉荣, 刘世忠, 等. 第二代单晶高温合金DD6的低周疲劳行为［J］. 材料热处理学报, 2011, 32(5): 41-45.
【18】黄志伟, 袁福河, 王中光, 等. 铸造镍基高温合金M963的高温低周疲劳行为［J］. 金属学报, 2007, 43(7): 678-682.
【19】ZHANG J X, MURAKUMO T, HARADA H. Creep deformation mechanisms in some modern single crystal superalloys［C］// Superalloys. Pennsylvania, TMS, 2004: 189-195.
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