Hostname: page-component-78c5997874-xbtfd Total loading time: 0 Render date: 2024-11-13T06:48:08.416Z Has data issue: false hasContentIssue false
  • English
  • Français

Research on the coarsening mechanism of precipitations and its effect on toughness for nickel-based weld metal during thermal aging

Published online by Cambridge University Press:  04 March 2019

Tongjiao Chu ,
Huali Xu ,
Haichao Cui  and
Fenggui Lu
Tongjiao Chu
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
Huali Xu
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
Haichao Cui
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
Fenggui Lu*
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: Lfg119@sjtu.edu.cn
Get access

Abstract

Coarsening mechanism of precipitations was investigated in a weld metal of Alloy 617 during long-term aging at 750 °C, and its effect on impact toughness was clarified distinctly. The needle-like M6C phases at the grain boundary nucleated and coarsened at 2000 h and then presented a stable size with aging to 8000 h. Spherical γ′ phase grew rapidly with the rate of 0.0121 nm/h when aged at 1000 h; then, its ripening rate (RR) reduced to 0.0033 nm/h at 8000 h and stabilized around it. The coarsening of M6C and γ′ was, respectively, controlled by interface diffusion and volume diffusion with the coarsening rate constant of 7.865 × 10−20 m2/s and 1.519 × 10−27 m3/s. Interaction of M6C and γ′ could facilitate their coarsening and cause dramatic decrease in toughness at the early stage. At aging to 8000 h and more, the lower RR of needle-like M6C phases and γ′ phases helped to form stable toughness at a later stage.

Keywords

microstructure evolutionspherical γ′needle-like M6CtoughnessNi-based weld metal
Type
Article
Information
Journal of Materials Research , Volume 34 , Issue 15 , 14 August 2019 , pp. 2705 - 2713
Check for updates
Copyright
Copyright © Materials Research Society 2019 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Yang, Z.B., Sun, J., Lu, S., and Vitos, L.: Assessing elastic property and solid-solution strengthening of binary Ni–Co, Ni–Cr, and ternary Ni–Co–Cr alloys from first-principles theory. J. Mater. Res. 33, 2763 (2018).CrossRefGoogle Scholar
Yuan, L., Hu, R., and Li, J.: Evolution behavior of superlattice phase with Pt2Mo-type structure in Ni–Cr–Mo alloy with low atomic Mo/Cr ratio. J. Mater. Res. 31, 427 (2016).CrossRefGoogle Scholar
Cozar, R. and Pineau, A.: Morphology of γ′ and γ″ precipitates and thermal stability of Inconel 718 type alloys. Metall. Trans. 4, 47 (1973).CrossRefGoogle Scholar
Xie, J., Shen, J., Chen, N., and Seetharaman, S.: Site preference and mechanical properties of Cr23−xTxC6 and Fe21T2C6 (T = Mo, W). Acta Mater. 54, 4653 (2006).CrossRefGoogle Scholar
Sims, C.T., Stoloff, N.S., and Hagel, W.C.: Superalloys II, 2nd ed. (Wiley-Interscience Press, USA, 1987); pp. 415–420.Google Scholar
Yang, F.M., Sun, X.F., Zhang, W., Kang, Y.P., Guan, H.R., and Hu, Z.Q.: Secondary M6C precipitation in K40S cobalt-base alloy. Mater. Lett. 49, 160 (2001).CrossRefGoogle Scholar
Wang, C.S., Guo, Y.A., Guo, J.T., and Zhou, L.Z.: Gamma prime stability and its influence on tensile behavior of a wrought superalloy with different Fe contents. J. Mater. Res. 31, 1361 (2016).CrossRefGoogle Scholar
Ribis, J., Bordas, E., Trocellier, P., Serruys, Y., de Carlan, Y., and Legris, A.: Comparison of the neutron and ion irradiation response of nano-oxides in oxide dispersion strengthened materials. J. Mater. Res. 30, 2210 (2015).CrossRefGoogle Scholar
Li, Y.S., Chen, Z., Lu, Y.L., and Wang, Y.X.: Coarsening kinetics of intermetallic precipitates in Ni75AlxV25−x alloys. J. Mater. Res. 22, 61 (2007).CrossRefGoogle Scholar
Meher, S., Carroll, M.C., Pollock, T.M., and Carroll, L.J.: Designing nickel base alloys for microstructural stability through low γ–γ′ interfacial energy and lattice misfit. Mater. Des. 140, 249 (2018).CrossRefGoogle Scholar
Wu, Y., Liu, Y., Li, C., Xia, X., Wu, J., and Li, H.: Coarsening behavior of γ′ precipitates in the γ′ + γ area of a Ni3Al-based alloy. J. Alloys Compd. 771, 526 (2019).CrossRefGoogle Scholar
Zhou, H.J., Xue, F., Chang, H., and Feng, Q.: Effect of Mo on microstructural characteristics and coarsening kinetics of γ′ precipitates in Co–Al–W–Ta–Ti alloys. J. Mater. Sci. Technol. 34, 799 (2018).CrossRefGoogle Scholar
Zhang, F., Cao, W., Zhang, C., Chen, S., Zhu, J., and Lv, D.: Simulation of Co-precipitation kinetics of γ′ and γ″ in superalloy 718. In Proceedings of the 9th International Symposium on Superalloy 718 & Derivatives: Energy, Aerospace, and Industrial Applications Ott, E., Liu, X.B., Andersson, J., Bi, Z.N., Bockenstedt, K., Dempster, I., Groh, J., Heck, K., Jablonski, P., Kaplan, M., Nagahama, D. and Sudbrack, C. eds.; Springer Publishing: Berlin, Germany, 2018; P.147.Google Scholar
Fuchs, G.E.: Solution heat treatment response of a third generation single crystal Ni-base superalloy. Mater. Sci. Eng., A 300, 52 (2001).CrossRefGoogle Scholar
Ezugwu, E.O., Wang, Z.M., and Machado, A.R.: The machinability of nickel-based alloys: A review. J. Mater. Process. Technol. 86, 1 (1999).CrossRefGoogle Scholar
Wu, Q., Song, H., Swindeman, R.W., Shingledecker, J.P., and Vasudevan, V.K.: Microstructure of long-term aged IN617 Ni-base superalloy. Metall. Mater. Trans. A 39, 2569 (2008).CrossRefGoogle Scholar
Zhou, X.Z. and Su, Y.C.: Microstructure of long-term aged IN617 Ni-base superalloy. Mater. Sci. Eng., A 527, 5153 (2010).CrossRefGoogle Scholar
Donoso, E., Espinoza, R., Diánez, M.J., and Criad, J.M.: Microcalorimetric study of the annealing hardening mechanism of a Cu–2.8Ni–1.4Si (at.%) alloy. Mater. Sci. Eng., A 556, 612 (2012).CrossRefGoogle Scholar
Oblak, J., Paulonis, D., and Duvall, D.: Coherency strengthening in Ni base alloys hardened by DO 22 γ′ precipitates. Metall. Trans. 5, 143 (1974).Google Scholar
Liu, L.R., Jin, T., Zhao, N.R., Wang, Z.H., Sun, X.F., Guan, H.R., and Hu, Z.Q.: Effect of carbon addition on the creep properties in a Ni-based single crystal superalloy. Mater. Sci. Eng., A 385, 105 (2004).CrossRefGoogle Scholar
Yang, J., Zheng, Q., Sun, X., Guan, H., and Hu, Z.: Relative stability of carbides and their effects on the properties of K465 superalloy. Mater. Sci. Eng., A 429, 341 (2006).CrossRefGoogle Scholar
Ali, M.K., Hashmi, M.S.J., and Yilbas, B.S.: Fatigue properties of the refurbished INCO-617 alloy. J. Mater. Process. Technol. 118, 45 (2001).Google Scholar
Jun, O.Y., Seog, R.W., Changmo, S., Hiun, K.I., and Hwa, H.J.: Grain boundary filmlike Fe–Mo–Cr phase in nitrogen-added type 316l stainless steels. J. Mater. Res. 14, 8 (1999).Google Scholar
Lirong, L., Maokai, C., Sugui, T., Zhang, Z.Y., and Tao, J.: Effect of Re content on precipitation behaviour of secondary phases in a single-crystal Ni-based superalloy during high-temperature thermal exposure. Mater. High Temp. 35, 355 (2018).CrossRefGoogle Scholar
Yashiro, K., Kurose, F., Nakashima, Y., Kubo, K., Tomita, Y., and Zbib, H.M.: Discrete dislocation dynamics simulation of cutting of γ′ precipitate and interfacial dislocation network in Ni-based superalloys. Int. J. Plast. 22, 713 (2006).CrossRefGoogle Scholar
Sun, Y.Q. and Hazzledine, P.M.: A TEM weak-beam study of dislocations in γ′ in a deformed Ni-based superalloy. Philos. Mag. A 58, 603 (1988).CrossRefGoogle Scholar
Finsy, R.: On the critical radius in Ostwald ripening. Langmuir 20, 2975 (2004).CrossRefGoogle ScholarPubMed
Streitenberger, P. and Zöllner, D.: The envelope of size distributions in Ostwald ripening and grain growth. Acta Mater. 88, 334 (2015).CrossRefGoogle Scholar