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Characterization of γ′ Precipitation Behavior in Additively Manufactured IN738LC Superalloy via In-Situ Small-Angle Neutron Scattering

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Proceedings of the 10th International Symposium on Superalloy 718 and Derivatives (TMS 2023)

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Abstract

In the present study, quantitative evaluation of the size and volume fraction of γ′ particles have been studied by Small-Angle Neutron Scattering (SANS) and FE-SEM in additively manufactured IN738LC Superalloy employing isothermal heat treatment conditions at 850 ℃. The results show that there is no observable γ′ precipitation in the as-deposited alloy, while a large number of small cellular and striated sub-structures can be characterized with widths ranging from 0.5 to 1.5 μm. During the 850 ℃ isothermal heat treatment, the γ′ phase rapidly precipitates in large quantities and shows a unimodal irregular sphere-like shape. The average size of the γ′ particles increases with longer aging times. After 10 min of isothermal heat treatment the average γ′ particle size is 72.5 nm. This average size increase to 137.3 nm after 120 min of ageing. However, the volume fraction (VF) of γ′ precipitates does not change after 10 min of isothermal heat treatment time, at which point the VF % reaches about 40%. This result varies significantly from IN738LC that was prepared by traditional casting processes.

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References

  1. Haines M P, Rielli V V, Primig S, et al. Powder bed fusion additive manufacturing of Ni-based superalloys: a review of the main microstructural constituents and characterization techniques[J]. Journal of Materials Science, 2022, 57(30): 14135–14187.

    Article  CAS  Google Scholar 

  2. Fernandez Z P, Kirka M M, Rossy A M, et al. Nickel-based superalloy single crystals fabricated via electron beam melting[J]. Acta Materialia, 2021, 216: 117–133.

    Google Scholar 

  3. Trevor K, Greta L, Supriyo G, et al. Application of finite element, phase-field, and CALPHAD-based methods to additive manufacturing of Ni-based superalloys[J]. Acta Materialia, 2017, 139: 244–253.

    Article  Google Scholar 

  4. Boswell J, Jones J, Barnard N, et al. The effects of energy density and heat treatment on the microstructure and mechanical properties of laser additive manufactured Haynes 282[J]. Materials & Design, 2021(6): 109725.

    Article  Google Scholar 

  5. Yasa E, Craeghs T, Badrossamay M, et al. Rapid manufacturing research at the catholic university of Leuven[C]. Rapid Tech 2009: US-TURKEY workshop on rapid technologies, 2009: 1–10.

    Google Scholar 

  6. Zhang D, Feng Z, Wang C, et al. Comparison of microstructures and mechanical properties of Inconel 718 alloy processed by selective laser melting and casting[J]. Materials Science and Engineering: A, 2018, 724: 357–367.

    Article  CAS  Google Scholar 

  7. Jiang X, Meng X, Song R, et al. Study on the Effects of Temperature Field of Material State Change in the SLM Process[J]. Applied Laser, 2015, 35(2): 155–159.

    Article  Google Scholar 

  8. Olakanmi E O, Cochrane R F, Dalgarno K W. Densification mechanism and microstructural evolutionin selective laser sintering of Al-12Si powders[J], Journal of Materials Processing Technology, 2011, 221: 113–121.

    Article  Google Scholar 

  9. Messé O M, Moreno R M, Illston T, et al. Metastable carbides and their impact on recrystallisation in IN738LC processed by selective laser melting[J]. Additive Manufacturing, 2018, 5: 394–404.

    Article  Google Scholar 

  10. Ojo O A, Richards N L, Chaturvedi M C. Study of the fusion zone and heat-affected zone microstructures in tungsten inert gas-welded INCONEL 738LC superalloy[J]. Metallurgical and Materials Transactions A, 2006, 37(2): 421–433.

    Article  Google Scholar 

  11. Grosdidier T, Hazotte A, Simon A. Precipitation and dissolution processes in γ/γ′ single crystal nickel-based superalloys[J]. Materials Science and Engineering: A, 1998, 256(1–2): 183–196

    Article  Google Scholar 

  12. Ojo O A, Richards N L, Chaturvedi M C. Contribution of constitutional liquation of gamma prime precipitate to weld HAZ cracking of cast Inconel 738 superalloy[J]. Scripta Materialia, 2003, 50(5): 641–646.

    Article  Google Scholar 

  13. Mathon M H , Perrut M , Zhong S Y , et al. Small angle neutron scattering study of martensitic/ferritic ODS alloys[J]. Journal of Nuclear Materials, 2012, 428(1–3): 147–153.

    Article  CAS  Google Scholar 

  14. Wang Y Q, Clark S J, Cai B, et al. Small-angle neutron scattering reveals the effect of Mo on interphase nano-precipitation in Ti-Mo micro-alloyed steels[J]. Scripta Materialia, 2020, 174: 24–28.

    Article  CAS  Google Scholar 

  15. Karge L, Gilles R, Mukherji D, et al. The influence of C/Ta ratio on TaC precipitates in Co-Re base alloys investigated by small-angle neutron scattering[J]. Acta Materialia, 2017: 132.

    Google Scholar 

  16. Xin X, Joakim O, Magnus H C, et al. Effect of cooling rate after solution treatment on subsequent phase separation during ageing of Fe-Cr alloys: A small-angle neutron scattering study[J]. Acta Materialia, 2017, 134: 221–229.

    Article  Google Scholar 

  17. Gilles R, Mukherji D, Eckerlebe H, et al. Investigations of early stage precipitation in a tungsten-rich nickel-base superalloy using SAXS and SANS[J]. Journal of Alloys & Compounds, 2014, 612: 90–97.

    Article  CAS  Google Scholar 

  18. Pavel S, Debashis M, Oliver N, et al. Characterization of nanoporous superalloy by SANS[J]. Physica B: Physics of Condensed Matter, 2006, 385(part-P1): 626–629.

    Google Scholar 

  19. Zrník, J, Strunz P, Horňák P. et al. Microstructural changes in long-time thermally exposed Ni-base superalloy studied by SANS.[J]. Applied Physics A: Materials Science & Processing, 2002, 74: 1.

    Google Scholar 

  20. Brass A M, Chêne J. Sans analysis of γ′ precipitation in the γ matrix of Ni base superalloy single crystals[J]. Scripta Materialia, 2000, 43(10): 913–918.

    Article  CAS  Google Scholar 

  21. Fergin L A, Svergun D I. Structure Analysis by Small-Angle X-Ray and Neutron Scattering[M]. New York: Plenum Press, 1987: 68–90.

    Google Scholar 

  22. Rosenthal R, West D R. Continuous γ′ precipitation in directionally solidified IN738 LC alloy [J]. Materials Science and Technology, 1999, 15: 1387–1394.

    Article  CAS  Google Scholar 

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 12205055) and the National Key Research and Development Program of China (Grant No. 2021YFB3702500).

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Author notes

  1. Qin and Chi: These authors contributed equally to this work and should be considered co-first authors.

Authors and Affiliations

  1. Beijing Key Laboratory of Advanced High Temperature Materials, Central Iron & Steel Research Institute, Beijing, 100081, China

    Hailong Qin, Mingzhao Xie, Songyi Shi, Hongyao Yu, Jinli Xie & Zhongnan Bi

  2. Beijing GAONA Materials & Technology Co., LTD, Beijing, 100081, China

    Hailong Qin, Hai Chi, Mingzhao Xie, Songyi Shi, Hongyao Yu, Jinli Xie & Zhongnan Bi

  3. University of Science and Technology Beijing, Beijing, 100083, China

    Ying Tao

  4. Department of Microstructure Physics and Alloy Design, Max-Planck-Institut Für Eisenforschung GmbH, Max-Planck-Straße 1, 40237, Düsseldorf, Germany

    Qing Tan

Authors
  1. Hailong Qin
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  2. Hai Chi
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  4. Mingzhao Xie
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Corresponding author

Correspondence to Hailong Qin .

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Editors and Affiliations

  1. General Electric, Cincinnati, OH, USA

    Eric A. Ott

  2. University West, Trollhättan, Sweden

    Joel Andersson

  3. National Energy Technology Laboratory, Albany, OR, USA

    Chantal Sudbrack

  4. Central Iron and Steel Research Institute, Beijing, China

    Zhongnan Bi

  5. ATI Specialty Materials, Monroe, NC, USA

    Kevin Bockenstedt

  6. Wyman Gordon/PPC, Houston, TX, USA

    Ian Dempster

  7. Haynes International, Kokomo, IN, USA

    Michael Fahrmann

  8. National Energy Technology Laboratory, Albany, OR, USA

    Paul Jablonski

  9. Oak Ridge National Laboratory, Oak Ridge, TN, USA

    Michael Kirka

  10. West Virginia University, Morgantown, WV, USA

    Xingbo Liu

  11. Honda R&D Co., Ltd., Wakō, Saitama, Japan

    Daisuke Nagahama

  12. NASA Glenn Research Center, Cleveland, OH, USA

    Tim Smith

  13. Montanuniversität Leoben, Leoben, Austria

    Martin Stockinger

  14. The University of Arizona, Tucson, AZ, USA

    Andrew Wessman

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Qin, H. et al. (2023). Characterization of γ′ Precipitation Behavior in Additively Manufactured IN738LC Superalloy via In-Situ Small-Angle Neutron Scattering. In: Ott, E.A., et al. Proceedings of the 10th International Symposium on Superalloy 718 and Derivatives. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-27447-3_14

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