固溶时间对镍基单晶高温合金中Re, Ru元素分布和微观形貌的影响
李 宪1，张晓娜1 *，于潇翔2，王崇愚2, 3，于 涛3，张 泽4
（1. 北京工业大学固体微结构与性能研究所，北京100124；2. 清华大学物理系，北京100084；3. 钢铁研究总院，北京100081；4. 浙江大学电镜中心，材料科学与工程学系，浙江杭州310027）
摘 要：本文利用光学显微镜、扫描电子显微镜及X射线能谱仪，研究了固溶时间对镍基单晶高温合金中Re, Ru元素分布以及合金微观形貌的影响。结果表明，固溶时间为1h时，Re，Ru均存在明显的枝晶偏析，固溶时间延长至20h时，Re的枝晶偏析行为得到很大改善，Ru的分布基本趋于均匀。与Re相比，Ru的扩散速率相对较快。与固溶时间为1h时的形貌相比，固溶20h后合金中γ′相形貌更规则，立方度更好。
关键词：镍基单晶高温合金；固溶处理；元素分布；微观形貌
中图分类号：TG132.3+2；TG115.21+5.3；O657.62 文献标识码：A doi:10.3969/j.1000-6281.2014.04.006
The effect of solution treatment time on the distribution of Re, Ru and the microstructure of nickel-based single crystal superalloys
LI Xian1, ZHANG Xiao-na1 *, YU Xiao-xiang2, WANG Chong-yu2, 3, YU Tao3, ZHANG Ze4
( 1. Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing 100124;2. Department of Physics, Tsinghua University, Beijing 100084;3. Central Iron & Steel Research Institute, Beijing 100081;4. Department of Material Science and Engineering, Zhejiang University, Hangzhou Zhejiang 310027, China )
Abstract:The effect of solution treatment time on the distribution of Re, Ru and the microstructure of nickel-based single crystal superalloys were investigated by optical microscopy, scanning electron microscopy and energy dispersive spectrometer. The results show that the composition distribution of Re and Ru is in a state of apparent dendritic segregation with 1 hour's solution treatment time, while when the solution treatment time is extended to 20 hours, the dendritic segregation of Re is greatly improved, and the distribution of Ru is almost uniform. This indicates that the diffusion rate of Ru is faster than that of Re. Compared with the microstructure with 1 hour's solution treatment time, the morphology of γ′ phase is more regular with 20 hours' solution treatment time.
Keywords:nickel-based single crystal superalloy; solution treatment; elements distribution; microstructure
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[1] Reed R C. The Superalloys Fundamentals and applications[M]. Cambridge: Cambridge University Press, 2006:3-10.
[2] 师昌绪, 仲增墉. 中国高温合金40年[J]. 金属学报, 1977, 33(1): 1-8.
[3] Pollock T M, Argon A S. Creep resistance of CMSX-3 nickel base superalloy single crystals[J]. Acta Metallurgica et Materialia, 1992, 40(1): 1-30.
[4] 胡壮麒, 刘丽荣, 金涛, 等. 镍基单晶高温合金的发展[J]. 航空发动机, 2006, 31(3): 1-7.
[5] Sato A, Harada H, Yokokawa T, et al. The effects of ruthenium on the phase stability of fourth generation Ni-base single crystal superalloys[J]. Scripta Materialia, 2006, 54(9): 1679-1684.
[6] Yeh A C, Tin S. Effects of Ru and Re additions on the high temperature flow stresses of Ni-base single crystal superalloys[J]. Scripta materialia, 2005, 52(6): 519-524.
[7]Pyczak F, Devrient B, Neuner F C, et al. The influence of different alloying elements on the development of the γ/γ′ microstructure of nickel-base superalloys during high-temperature annealing and deformation[J]. Acta materialia, 2005, 53(14): 3879-3891.
[8] Brückner U, Epishin A, Link T, et al. The influence of the dendritic structure on the γ/γ′- lattice misfit in the single-crystal nickel-base superalloy CMSX-4[J]. Materials Science and Engineering: A, 1998, 247(1): 23-31.
[9] Husseini N S, Kumah D P, Yi J Z, et al. Mapping single-crystal dendritic microstructure and defects in nickel-base superalloys with synchrotron radiation[J]. Acta Materialia, 2008, 56(17): 4715-4723.
[10] Wilson B C, Cutler E R, Fuchs G E. Effect of solidification parameters on the microstructures and properties of CMSX-10[J]. Materials Science and Engineering: A, 2008, 479(1): 356-364.
[11] Diologent F, Caron P. On the creep behavior at 1033K of new generation single-crystal superalloys[J]. Materials Science and Engineering: A, 2004, 385(1): 245-257.
[12] Murakumo T, Kobayashi T, Koizumi Y, et al. Creep behaviour of Ni-base single-crystal superalloys with various γ′ volume fraction[J]. Acta Materialia, 2004, 52(12): 3737-3744.
[13] Yeh A C, Tin S. Effects of Ru and Re additions on the high temperature flow stresses of Ni-base single crystal superalloys[J]. Scripta materialia, 2005, 52(6): 519-524.
[14] Sato A, Harada H, Yokokawa T, et al. The effects of ruthenium on the phase stability of fourth generation Ni-base single crystal superalloys[J]. Scripta Materialia, 2006, 54(9): 1679-1684.
[15] Jena A K, Chaturvedi M C. The role of alloying elements in the design of nickel-base superalloys[J]. Journal of materials science, 1984, 19(10): 3121-3139.
[16] Yu X X, Wang C Y, Zhang X N, et al. Synergistic effect of rhenium and ruthenium in nickel-based single-crystal superalloys[J]. Journal of Alloys and Compounds, 2014, 582: 299-304.
