In Situ Small-Angle Neutron Scattering Study of Precipitation and Evolution Behavior of Secondary Phases in Ni-Based Superalloys
Received date: 2024-03-05
Revised date: 2024-04-12
Online published: 2024-04-28
Supported by
National Key Research and Development Program of China(2021YFA1600603);National Natural Science Foundation of China(52271042);National Natural Science Foundation of China(51911530154);National Natural Science Foundation of China(91860201);National Natural Science Foundation of China(U2141206);National Science and Technology Major Project(J2019-VI-0010-0124);CSNS Consortium on High-performance Materials of Chinese Academy of Sciences(JZHKYPT-2021-01);Science Center for Gas Turbine Project(P2022-C-IV-001-001)
The γ′ and γ′′ phases are crucial strengthening components in Ni-based superalloys. Understanding their precipitation and evolution mechanism during heat treatment is essential for tailoring the mechanical properties of the superalloys. Herein, GH4169 superalloy was used to investigate the precipitation and evolution behaviors of secondary phases during in situ standard heat treatment by time-of-flight small-angle neutron scattering. Further, transmission electron microscopy was employed to observe the secondary phases generated in samples after ex situ heat treatment. Results showed that the secondary phases, including the spherical γ′ phase and coprecipitates (mainly the γ′′/γ′/γ′′ sandwich structure), mostly occurred during the aging treatment. After the formation of coprecipitates during the first aging treatment (AT1), their quantity apparently remained stable during the second aging treatment (AT2). Furthermore, the average size of the γ′ phase and coprecipitates gradually increased during the AT1 stage while remaining almost constant during the AT2 stage. Throughout the aging process, the interface between spherical γ′ phase and γ matrix exhibited a decreased composition fluctuation, while the interface fluctuation of coprecipitates was always significant. Thus, it can be inferred that the precipitation and evolution behaviors of secondary phases are controlled by the element diffusion at the interface.
LI Yawei , XIE Guang , KE Yubin , LU Yuzhang , HUANG Yaqi , ZHANG Jian . In Situ Small-Angle Neutron Scattering Study of Precipitation and Evolution Behavior of Secondary Phases in Ni-Based Superalloys[J]. Acta Metall Sin, 2024 , 60(8) : 1100 -1108 . DOI: 10.11900/0412.1961.2024.00068
| 1 | Reed R C. The Superalloys: Fundamentals and Applications [M]. New York: Cambridge University Press, 2006: 50 |
| 2 | Lu X D, Du J H, Deng Q. High temperature structure stability of GH4169 superalloy [J]. Mater. Sci. Eng., 2013, A559: 623 |
| 3 | Rao G A, Kumar M, Srinivas M, et al. Effect of standard heat treatment on the microstructure and mechanical properties of hot isostatically pressed superalloy inconel 718 [J]. Mater. Sci. Eng., 2003, A355: 114 |
| 4 | Yu Z S, Zhang J X, Yuan Y, et al. Microstructural evolution and mechanical properties of Inconel 718 after thermal exposure [J]. Mater. Sci. Eng., 2015, A634: 55 |
| 5 | Slama C, Abdellaoui M. Precipitation kinetics of γ′ and γ′′ particles in Inconel 718 and its influence on mechanical properties [J]. Mater. Today Commun., 2024, 38: 108158 |
| 6 | Cozar R, Pineau A. Morphology of γ′ and γ′′ precipitates and thermal stability of Inconel 718 type alloys [J]. Metall. Trans., 1973, 4: 47 |
| 7 | Zhao X B, Gu Y F, Lu J T, et al. New research development of superalloy GH4169 [J]. Rare Met. Mater. Eng., 2015, 44: 768 |
| 赵新宝, 谷月峰, 鲁金涛 等. GH4169合金的研究新进展 [J]. 稀有金属材料与工程, 2015, 44: 768 | |
| 8 | Cao G H, Sun T Y, Wang C H, et al. Investigations of γ′, γ′′ and δ precipitates in heat-treated Inconel 718 alloy fabricated by selective laser melting [J]. Mater. Charact., 2018, 136: 398 |
| 9 | Le W, Chen Z W, Yan K, et al. Early evolution of δ phase and coarse γ′′ phase in Inconel 718 alloy with high temperature ageing [J]. Mater. Charact., 2021, 180: 111403 |
| 10 | Slama C, Abdellaoui M. Structural characterization of the aged Inconel 718 [J]. J. Alloys Compd., 2000, 306: 277 |
| 11 | Lee G H, Park M, Kim B, et al. Evaluation of precipitation phase and mechanical properties according to aging heat treatment temperature of Inconel 718 [J]. J. Mater. Res. Technol., 2023, 27: 4157 |
| 12 | Balan A, Perez M, Chaise T, et al. Precipitation of γ′′ in Inconel 718 alloy from microstructure to mechanical properties [J]. Materialia, 2021, 20: 101187 |
| 13 | Qiao Z, Li C, Zhang H J, et al. Evaluation on elevated-temperature stability of modified 718-type alloys with varied phase configurations [J]. Int. J. Miner. Metall. Mater., 2020, 27: 1123 |
| 14 | Alam T, Chaturvedi M, Ringer S P, et al. Precipitation and clustering in the early stages of ageing in Inconel 718 [J]. Mater. Sci. Eng., 2010, A527: 7770 |
| 15 | Lawitzki R, Hassan S, Karge L, et al. Differentiation of γ′- and γ′′- precipitates in Inconel 718 by a complementary study with small-angle neutron scattering and analytical microscopy [J]. Acta Mater., 2019, 163: 28 |
| 16 | Yang Y, Liu Y Y, Hu L X, et al. Quantitative study on dynamic instantaneous dissolution of precipitated phases in 2195-T6 Al-Li alloy based on characterizations with SANS and TEM [J]. Acta Mater., 2024, 266: 119689 |
| 17 | Wu W Z, Wang Z J, Li T F, et al. Study on the micro-mechanism of thermal aging hardening of Fe-0.6Cu alloy [J]. J. Shenyang Ligong Univ., 2020, 39(4): 21 |
| 吴文臻, 王子军, 李天富 等. Fe-0.6Cu合金的热时效硬化微观机制研究 [J]. 沈阳理工大学学报, 2020, 39(4): 21 | |
| 18 | Staron P, Christoph U, Appel F, et al. SANS investigation of precipitation hardening of two-phase γ-TiAl alloys [J]. Appl. Phys., 2002, 74(suppl.1)A : s1163 |
| 19 | Simm T H, Sun L, Galvin D R, et al. A SANS and APT study of precipitate evolution and strengthening in a maraging steel [J]. Mater. Sci. Eng., 2017, A702: 414 |
| 20 | Yang Y, Chen T Y, Tan L Z, et al. Bifunctional nanoprecipitates strengthen and ductilize a medium-entropy alloy [J]. Nature, 2021, 595: 245 |
| 21 | Brass A M, Chêne J. SANS analysis of γ′ precipitation in the γ matrix of Ni base superalloy single crystals [J]. Scr. Mater., 2000, 43: 913 |
| 22 | Collins D M, Heenan R K, Stone H J. Characterization of gamma prime (γ′) precipitates in a polycrystalline nickel-base superalloy using small-angle neutron scattering [J]. Metall. Mater. Trans., 2011, 42A: 49 |
| 23 | Zrník J, Strunz P, Horňák P, et al. Microstructural changes in long-time thermally exposed Ni-base superalloy studied by SANS [J]. Appl. Phys., 2002, 74A(suppl.1) : s1155 |
| 24 | Ratel N, Demé B, Bastie P, et al. In situ SANS investigation of the kinetics of rafting of γ′ precipitates in a fourth-generation single-crystal nickel-based superalloy [J]. Scr. Mater., 2008, 59: 1167 |
| 25 | Editorial Board of China Aeronautical Materials Handbook. China Aeronautical Materials Handbook [M]. 2nd Ed., Beijing: China Standard Press, 2002: 325 |
| 《中国航空材料手册》编辑委员会. 中国航空材料手册 [M]. 第2版. 北京: 中国标准出版社, 2002: 325 | |
| 26 | Ujihara T, Osamura K. Kinetic analysis of spinodal decomposition process in Fe-Cr alloys by small angle neutron scattering [J]. Acta Mater., 2000, 48: 1629 |
| 27 | Wang W J. Spinodal decomposition and its effect on mechanical properties of Ti2448 alloy [D]. Hefei: University of Science and Technology of China, 2022 |
| 王伟杰. Ti2448合金的成分分解和组织性能研究 [D]. 合肥: 中国科学技术大学, 2022 | |
| 28 | H?rnqvist M, Thuvander M, Steuwer A, et al. Early stages of spinodal decomposition in Fe-Cr resolved by in-situ small-angle neutron scattering [J]. Appl. Phys. Lett., 2015, 106: 061911 |
| 29 | Wu X L, Wang B, Rehm C, et al. Ultra-small-angle neutron scattering study on temperature-dependent precipitate evolution in CoCrFeNiMo0.3 high entropy alloy [J]. Acta Mater., 2022, 222: 117446 |
| 30 | Sarkar S K, Shinde D, Das A, et al. Quantitative evaluation of spinodal decomposition in thermally aged binary Fe-35 at.% Cr alloys by correlative atom probe tomography and small angle neutron scattering analyses [J]. Materialia, 2021, 15: 101014 |
| 31 | Rielli V V, Theska F, Godor F, et al. Evolution of nanoscale precipitates during common Alloy 718 ageing treatments [J]. Mater. Des., 2021, 205: 109762 |
| 32 | He J, Han G, Fukuyama S, et al. Interfaces in a modified Inconel 718 with compact precipitates [J]. Acta Mater., 1998, 46: 215 |
| 33 | McAllister D, Lv D, Deutchman H, et al. Characterization and modeling of deformation mechanisms in Ni-base superalloy 718 [A]. Superalloys 2016: Proceedings of the 13th Intenational Symposium of Superalloys [M]. Hoboken: Wiley, 2016: 821 |
| 34 | Kindrachuk V, Wanderka N, Banhart J. γ′/γ″ co-precipitation in Inconel 706 alloy: A 3D finite element study [J]. Mater. Sci. Eng., 2006, A417: 82 |
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