Effects of Stressed Aging on TCP Phase Precipitation Behaviour of DD11 Single Crystal Superalloy
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摘要: 对完全热处理后的DD11镍基单晶高温合金分别进行了1 070 ℃、100 MPa应力时效和1 070 ℃无应力时效处理，分析了不同条件时效后拓扑密堆（TCP）相的析出行为。结果表明：在应力时效和无应力时效50 h后，试验合金中均未析出TCP相，时效至100 h时，在枝晶干区域均开始析出TCP相，且析出量随时效时间的延长而增加；在相同的时效时间内，应力时效后TCP相的析出量比无应力时效后的少，应力没有改变TCP相的化学成分和晶体结构，析出的TCP相均为μ相。Abstract: After a completely heat treatment, DD11 nickel-based single crystal superalloy was treated by stressed aging at 1 070℃ under 100 MPa and unstressed aging at 1 070℃, respectively. The precipitation behaviour of topologically close-packed (TCP) phase after aging under different conditions was analyzed. The results show that no TCP phase precipitated in the tested alloy after stressed aging and unstressed aging for 50 h. After aging for 100 h, TCP phase began to precipitate in dendrite region; the precipitation amount of TCP phase increased with the extension of aging time. For the same aging time, the precipitation amount of TCP phase after stressed aging was less than that after unstressed aging. The stress did not change chemical composition and crystal structure of TCP phase; the precipitated TCP phase was μ phase.
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[1] 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.
[2] 于达仁, 刘金福, 徐基豫. 面向21世纪的燃气轮机技术的发展[J]. 燃气轮机技术, 2001(1):14-21. [3] CARON P, KHAN T. Evolution of Ni-based superalloys for single crystal gas turbine blade applications[J]. Aerospace Science & Technology, 1999, 3(3):513-523.
[4] YANG J X, ZHENG Q, SUN X F, et al. Topologically close-packed phase precipitation in a nickel-base superalloy during thermal exposure[J]. Materials Science and Engineering:A, 2007, 465(1/2):100-108.
[5] SEISER B, DRAUTZ R, PETTIFOR D G. TCP phase predictions in Ni-based superalloys:Structure maps revisited[J]. Acta Materialia, 2011, 59(2):749-763.
[6] RAE C M F, HOOK M S, REED R C. The effect of TCP morphology on the development of aluminide coated superalloys[J]. Materials Science & Engineering:A, 2005, 396(1/2):231-239.
[7] 田素贵, 钱本江, 李唐, 等. 镍基单晶合金中TCP相的析出行为及其对持久性能的影响[J]. 中国有色金属学报, 2010, 20(11):2154-2161. [8] REED R C, COX D C, RAE C M F. Damage accumulation during creep deformation of a single crystal superalloy at 1150℃[J]. Materials Science & Engineering:A, 2007, 448(1):88-96.
[9] SHENG L Y, YANG F, GUO J T, et al. Anomalous yield and intermediate temperature brittleness behaviors of directionally solidified nickel-based superalloy[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(3):673-681.
[10] ACHARYA M V, FUCHS G E. The effect of stress on the microstructural stability of CMSX-10 single crystal Ni-base superalloys[J]. Scripta Materialia, 2006, 54(1):61-64.
[11] 谷怀鹏, 曹腊梅, 薛明, 等. 持久应力对DD10单晶高温合金1100℃组织稳定性的影响[J]. 航空材料学报, 2014, 34(2):1-5. [12] 赵云松, 张剑, 骆宇时, 等. Hf对第二代镍基单晶高温合金DD11高温低应力持久性能的影响[J]. 金属学报, 2015(10):1261-1272. [13] QUESTED P N, MCLEAN M. Solidification morphologies in directionally solidified superalloys[J]. Materials Science & Engineering, 1984, 65(1):171-180.
[14] FENG Q, NANDY T K, TIN S, et al. Solidification of high-refractory ruthenium-containing superalloys[J]. Acta Materialia, 2003, 51(1):269-284.
[15] FUCHS G E. Improvement of creep strength of a third generation, single-crystal Ni-base superalloy by solution heat treatment[J]. Journal of Materials Engineering & Performance, 2002, 11(1):19-25.
[16] CARON P, KHAN T. Improvement of creep strength in a nickel-base single-crystal superalloy by heat treatment[J]. Materials Science & Engineering, 1983, 61(2):173-184.
[17] KARUNARATNE M S A, CARTER P, REED R C. Interdiffusion in the face-centred cubic phase of the Ni-Re, Ni-Ta and Ni-W systems between 900 and 1300℃[J]. Materials Science & Engineering:A, 2000, 281(1/2):229-233.
[18] SIMS C T, STOLOFF N S, HAGEL W C. Superalloys Ⅱ[J].Materialsence, 1987,55(2):163-190.
[19] HECKL A, CENANOVIC S, GÖKEN M, et al. Discontinuous precipitation and phase stability in Re- and Ru-containing nickel-base superalloys[J]. Metallurgical & Materials Transactions A, 2012, 43(1):10-19.
[20] PENG Z, POVSTUGAR I, MATUSZEWSKI K, et al. Effects of Ru on elemental partitioning and precipitation of topologically close-packed phases in Ni-based superalloys[J]. Scripta Materialia, 2015, 101:44-47.
[21] RAE C M F, REED R C. The precipitation of topologically close-packed phases in rhenium-containing superalloys[J]. Acta Materialia, 2001, 49(19):4113-4125.
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