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Effect of Si on Solidification Behavior and Mechanical Property of Superalloy K4169 |
Xiaoliang LI1,2, Bo CHEN1(), Weiwei XING1, Leilei DING1, Yingche MA1, Kui LIU1 |
1 .Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 2 School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China |
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Cite this article:
Xiaoliang LI, Bo CHEN, Weiwei XING, Leilei DING, Yingche MA, Kui LIU. Effect of Si on Solidification Behavior and Mechanical Property of Superalloy K4169. Chinese Journal of Materials Research, 2018, 32(12): 936-945.
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Abstract The segregation- and precipitation-behavior of superalloy K4169 with 0.03~0.65% Si (atomic fraction) in the temperature range of 1150℃~1360℃ via thermo-calc simulation and isothermal solidification experiment. Results show that not only the temperature of solidus-liquid will decrease but also the solid-liquid two-phase region will enlarge with the existence of Si. The liquidus temperature of the alloy decreases from 1354℃ to 1343℃ and the solidus temperature drops from 1241℃ to 1212℃ with the increasing of Si content from 0.03% to 0.64%. With the increasing of Si content, the enrichment of Nb and Mo are promoted in the residual liquid phase, resulting in the depletion of Cr and Fe, while the content of Laves phase increases along with the segregation. Different morphologies are delivered of Laves phase due to the different Si contents in the alloy. The reticular Laves phase was obtained with 0.03% and 0.23% Si, while large blocky laves phase was observed with 0.42% and 0.65% Si. Si has almost no effect on the morphology and precipitation temperature of MC carbide. Si not only affects the room temperature performance of the alloy, but also the elevated temperature performance of the alloy. When the Si content increased from 0.03% to 0.65%, both of the creep-rupture life and elongation are decreased obviously. Base on these research results, as an overall consideration, it is rational to control the Si content for K4169 alloy.
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Received: 08 March 2018
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[1] | Tang X, Cao L M, Gai Q D, et al.Investment casting technology and heat treatment process of K4169 superalloy integral nozzle ring[J]. Aerospace Mater. Technol., 2007, 37(6): 82(汤鑫, 曹腊梅, 盖其东等. K4169合金整体导向环精铸技术及热处理工艺研究[J]. 宇航材料工艺, 2007, 37(6): 82) | [2] | Ji G S, Yang Y L, Qou S Z.Investigation of high-temperature phase transformation of nickel-base superalloy K4169[J]. J. Lanzhou Univ. Technol., 2016, 42(3): 14(季根顺, 杨彦莉, 寇生中. 镍基高温合金K4169的高温相变研究[J]. 兰州理工大学学报, 2016, 42(3): 14) | [3] | Paulonis D F, Schirra J J.Alloy 718 at Pratt & Whitney-Historical Perspective and Future Challenges [A]. Loria E A ed. Superalloys. TMS, 2001: 13 | [4] | Mills W J.The effect of heat treatment on the room temperature and elevated temperature fracture toughness response of alloy 718[J]. J. Eng. Mater. Technol., 1980, 102: 118 | [5] | Zhang H Y, Zhang S H, Cheng M, et al.Deformation characteristics of δ phase in the delta-processed Inconel 718 alloy[J]. Mater. Charact., 2010, 61: 49 | [6] | Whitmore L, Ahmadi M R, Guetaz L.The microstructure of heat-treated nickel-based superalloy 718Plus[J]. Mater. Sci. Eng., 2014, 610A: 39 | [7] | Bieber C G, Decker R F.The melting of malleable nickel and nickel alloys[J]. Trans. Metall. Soc. AIME, 1961, 221: 629-636 | [8] | Holt R T, Wallace W.Impurities and trace elements in nickel-base superalloys[J]. Int. Meter. Rev., 1976, 21: 1 | [9] | Hu Z Q, Sun W R, Guo S R, et al.Effect of P, S, and Si on the solidification, segregation, microstructure and mechanical properties in Fe-Ni base superalloys[J]. Acta Metall. Sin., 1996, 9: 443 | [10] | Wei X Y, Yang Q B.Effect of Mn and Si on notch sensitivity of an Fe-Ni base superalloy[J]. Acta Metall. Sin., 1984, 20: A261(魏翔云, 杨奇斌. Mn和Si对一种Fe-Ni基高温合金持久缺口敏感性的影响[J]. 金属学报, 1984, 20: A261) | [11] | Xu Z F, Jiang L, Dong J S, et al.The effect of silicon on precipitation and decomposition behaviors of M6C carbide in a Ni-Mo-Cr superalloy[J]. J. Alloy. Compd., 2015, 620: 197 | [12] | Meetham G W.Trace elements in superalloys-an overview[J]. Metals. Technol., 1984, 11: 414 | [13] | Douglass D L, Armijo J S.The effect of silicon and manganese on the oxidation mechanism of Ni-20 Cr[J]. Oxidat. Metals, 1970, 2: 207 | [14] | Guo J T.Effects of several minor elements on superalloys and their mechanism[J]. Chin. J. Nonferr. Meter., 2011, 21: 465(郭建亭. 几种微量元素在高温合金中的作用与机理[J]. 中国有色金属学报, 2011, 21: 465) | [15] | Liu Y, Deng B, Zhong Z Y, et al.Distribution and effect on precipitation of Si in GH907 superalloy[J]. Iron Steel, 1997, 32(6): 56(刘瑛, 邓波, 仲增墉等. 硅在GH907低膨胀高温合金中的分布及对析出相的影响[J]. 钢铁, 1997, 32(6): 56) | [16] | Sun W R, Guo S R, Lu D Z, et al.Effect of Si on solidification and segregation in inconel 718 alloy[J]. J. Aeronaut. Mater., 1996, 16(2): 7(孙文儒, 郭守仁, 卢德忠等. Si对IN718合金凝固过程及元素偏析的影响[J]. 航空材料学报, 1996, 16(2): 7) | [17] | Cao G X, Zhang M C, Dong J X, et al.Effects of Nb content variations on precipitates evolution of GH4169 ingots during their solidification and homogenization processes[J]. Rare Metal Mater. Eng., 2014, 43: 103(曹国鑫, 张麦仓, 董建新等. Nb含量对GH4169合金钢锭凝固及均匀化过程相演化规律的影响[J]. 稀有金属材料与工程, 2014, 43: 103) | [18] | Sun W R, Guo S R, Guo J T, et al.The common strengthening effect of phosphorus, sulfur, and silicon in lower contents and a problem of a net superalloy [A]. Pollock T M, Kissinger R D, Bowman R R eds. Superalloys. TMS, 2000: 467 | [19] | McLean M, Strang A. Effects of trace elements on mechanical properties of superalloys[J]. Metals Technol., 1984, 11: 454 | [20] | Wang A C, Li Y Y, Fan C G, et al.Effect of P and Si(Mn) on the solidification segregation in an iron-based superalloy[J]. Scripta Metall. Mater., 1994, 31: 1695 | [21] | Shi Z X, Dong J X, Zhang M C, et al.Solidification characteristics and segregation behavior of Ni-based superalloy K418 auto turbochargre turbine[J]. J. Alloys Compd., 2013, 571: 168 | [22] | Gizan X R, Liu E Z, Zheng Z, et al.Solidification behavior and segregation of Re-containing cast Ni-base superalloy with different Cr content[J]. J. Mater. Sci. Technol., 2011, 27: 113 |
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