Effects of Nickel Content on High Temperature Coarsening of γ' Phase in Co-8.8Al-9.8W Alloys
XU Yangtao1, 2, LOU Dechao1, 2, CHEN Baolin1, 2
1 State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050; 2 School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050
Abstract: The influence of nickel contents (5%, 15%, 25%, 35%,at%) on γ/γ' two-phase microstructure and γ' phase coarsening behavior of Co-8.8Al-9.8W based high temperature alloy at 1 000 ℃ for 5 h,10 h,15 h and 25 h was studied by field emission scanning electron microscope (FE-SEM) and image analysis method. The results show that the rapid growths of γ' phase and volume fraction of γ' phase decrease gradually with the increase of aging time. When Ni content is 5% and 15%, γ' phase completely dissolved at 10 h. When Ni content is 25% and 35%, the morphology of γ' phase shifted from initial cubic shape to irregular shape. Finally, it tend to be spherical, the size of γ' phase will also increase with the increase of aging time. The coarsening of γ' particles of the alloy follows LSW theory. The coarsening rate of 25Ni alloy is higher than that of 35Ni alloy.
徐仰涛, 娄德超, 陈宝林. 镍含量对Co-8.8Al-9.8W合金中γ'相高温粗化的影响[J]. 材料导报, 2018, 32(6): 943-946.
XU Yangtao, LOU Dechao, CHEN Baolin. Effects of Nickel Content on High Temperature Coarsening of γ' Phase in Co-8.8Al-9.8W Alloys. Materials Reports, 2018, 32(6): 943-946.
1 Sato J, Omori T, Oikawa K, et al. Cobalt-base high-temperature alloys[J].Science,2006,312:90. 2 Chen M, Wang C Y. First-principle investigation of 3d transition metal elements in γ'-Co3(Al,W)[J].Journal of Applied Physics,2010,107(9):90. 3 Chen M, Wang C Y. First-principles investigation of the site prefe-rence and alloying effect of Mo, Ta and platinum group metals in γ'-Co3(Al,W)[J].Scripta Materialia,2009,60(8):659. 4 Meher S, Banerjee R. Partitioning and site occupancy of Ta and Mo in Co-base γ/γ' alloys studied by atom probe tomography[J].Intermetallics,2014,49(2):138. 5 Povstugar I, Choi P P, Neumeier S, et al. Elemental partitioning and mechanical properties of Ti- and Ta-containing Co-Al-W-base superalloys studied by atom probe tomography and nanoindentation[J].Acta Materialia,2014,78(4):78. 6 Yan H Y, Vorontsov V A, Dye D. Alloying effects in polycrystalline γ' strengthened Co-Al-W base alloys[J].Intermetallics,2014,48:44. 7 Xue F, Zhou H J, Shi Q Y, et al. Creep behavior in a γ' streng-thened Co-Al-W-Ta-Ti single-crystal alloy at 1 000 ℃[J].Scripta Materialia,2015,97:37. 8 Shinagawa K, Omori T, Sato J, et al. Phase equilibria and microstructure on γ' phase in Co-Ni-Al-W system[J].Materials Transactions,2008;49:1474. 9 Xue Fei, Mi Tao,Wang Meiling, et al. Effect of Ni microstructural evolution and γ' dissolution of novel Co-Al-W base alloys[J].Acta Metallurgica Sinica,2014,50(7):845(in Chinese). 薛飞,米涛,王美玲,等.Ni对Co-Al-W基合金时效组织演变和γ'相溶解行为的影响[J].金属学报,2014,50(7):845. 10 Wu D, Tian Lixi, Ma Chaoli. Effect of aging time at high temperature on microstructural evolution behavior of a nickel-based single crystal superalloy[J].Rare Metal Materials & Engineering,2015,44(6):1345. 11 Han Jiecai, Li Xiaohai, Chen Guiqing, et al. Coarsening of γ' preci-pitates in a nickel based superalloy prepared by EBPVD[J].Journal of Aeronautical Materials,2006,26(6):38(in Chinese). 韩杰才,李晓海,陈贵清,等.EBPVD制备镍基高温合金中γ'相的粗化[J].航空材料学报,2006,26(6):38. 12 Meher S, Nag S, Tiley J, et al. Coarsening kinetics of γ' precipitates in cobalt-base alloys[J].Acta Materialia,2013,61(11):4266. 13 Cheng X L, Li Y S, Zhang L, et al. Phase field simulation of morphology evolution and coarsening of γ' intermetallic phase in Ni-Al alloy[J].Materials Science and Technology,2013,29(3):364. 14 Coakley J, Basoalto H, Dye D. Coarsening of a multimodal nickel-base superalloy[J].Acta Materialia,2010,58(11):4019. 15 Vorontsov V A, Barnard J S, Rahman K M, et al. Coarsening behaviour and interfacial structure of γ', precipitates in Co-Al-W based superalloys[J].Acta Materialia,2016,120:14. 16 Xu Yangtao. Study on cobalt based novel Co-Al-W superalloys design, preparation and properties[D].Lanzhou:Lanzhou University of Techno-logy,2010(in Chinese). 徐仰涛. 新型钴基Co-Al-W合金设计、制备及性能研究[D].兰州:兰州理工大学,2010. 17 Xia Rongli. Effect of alloying elements on strengthening phase of Co-8.8Al-9.8W superalloy[D].Lanzhou:Lanzhou University of Techno-logy,2016(in Chinese). 夏荣里. 合金化元素对Co-8.8Al-9.8W合金强化相的影响[D].兰州:兰州理工大学,2016. 18 ASTM E562-11, Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count[S].2011. 19 Sauza D J, Bocchini P J, Dunand D C, et al. Influence of ruthenium on microstructural evolution in a model Co-Al-W superalloy[J].Acta Materialia,2016,117:135. 20 Liu Jiantao, Liu Guoquan, Hu Benfu, et al. The coarsening behavior of γ' particles in FGH96 superalloys during the temperature treatment[J].Rare Metal Materials and Engineering,2006,35(3):418(in Chinese). 刘建涛,刘国权,胡本芙,等.FGH96合金中γ'相的高温粗化行为[J].稀有金属材料与工程,2006,35(3):418. 21 Yu Jian, Li Jiarong, Shi Zhenxue, et al.precipitation of secondary γ' phase of DD6 crystal superalloy[J].Rare Metal Materials and Engineering,2013,42(8):1654(in Chinese). 喻健,李嘉荣,史振学,等.DD6单晶高温合金二次γ'相的析出[J].稀有金属材料与工程,2013,42(8):1654. 22 Shi Zhenxue, Liu Shizhong, Xiong Jichun, et al. Microstructure evolution behavior of DD6 single crystal superalloy at different using temperatures[J].The Chinese Journal of Nonferrous Metals,2015(11):3077(in Chinese). 史振学,刘世忠,熊继春,等.不同使用温度下DD6单晶高温合金的组织演变行为[J].中国有色金属学报,2015(11):3077. 23 Yao Zhihao, Dong Jianxin, Chen Xu, et al. Gamma prime phase evolution during long-time exposure for GH738 superally[J].Tran-sactions of Materials and Heat Treatment,2013,34(1):31. 姚志浩,董建新,陈旭,等.GH738高温合金长期时效过程中γ'相演变规律[J].材料热处理学报,2013,34(1):31. 24 Chen Jingyang, Zhao Bin, Feng Qiang, et al. Effects of Ru and Cr on γ/γ' microstructural evolution of Ni-based single crystal superalloys during heat treatment[J].Acta Metallurgica Sinica,2010,46(8):897. 陈晶阳,赵宾,冯强,等. Ru和Cr对镍基单晶高温合金γ/γ'热处理组织演变的影响[J].金属学报,2010,46(8):897.
渝公网安备50019002502923号 版权所有：《材料导报》编辑部
2018, Vol. 32 
