On the Effect of Nb on the Microstructure and Properties of Next Generation Polycrystalline Powder Metallurgy Ni-Based Superalloys

Katerina A. Christofidou; Mark C. Hardy; Hang Yue Li; Christos Argyrakis; Hiroto Kitaguchi; Nicholas G. Jones; Paul M. Mignanelli; Alison S. Wilson; Olivier M.D.M. Messé; Ed J. Pickering; Robert J. Gilbert; Cathie M.F. Rae; Suyang Yu; Alex Evans; Daniel Child; Paul Bowen; Howard J. Stone

doi:10.1007/s11661-018-4682-4

On the Effect of Nb on the Microstructure and Properties of Next Generation Polycrystalline Powder Metallurgy Ni-Based Superalloys

Katerina A. Christofidou^*, Mark C. Hardy, Hang Yue Li, Christos Argyrakis, Hiroto Kitaguchi, Nicholas G. Jones, Paul M. Mignanelli, Alison S. Wilson, Olivier M.D.M. Messé, Ed J. Pickering, Robert J. Gilbert, Cathie M.F. Rae, Suyang Yu, Alex Evans, Daniel Child, Paul Bowen, Howard J. Stone

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of Nb on the properties and microstructure of two novel powder metallurgy (P/M) Ni-based superalloys was evaluated, and the results critically compared with the Rolls-Royce alloy RR1000. The Nb-containing alloy was found to exhibit improved tensile and creep properties as well as superior oxidation resistance compared with both RR1000 and the Nb-free variant tested. The beneficial effect of Nb on the tensile and creep properties was due to the microstructures obtained following the post-solution heat treatments, which led to a higher γ′ volume fraction and a finer tertiary γ′ distribution. In addition, an increase in the anti-phase-boundary energy of the γ′ phase is also expected with the addition of Nb, further contributing to the strength of the material. However, these modifications in the γ′ distribution detrimentally affect the dwell fatigue crack-growth behavior of the material, although this behavior can be improved through modified heat treatments. The oxidation resistance of the Nb-containing alloy was also enhanced as Nb is believed to accelerate the formation of a defect-free Cr₂O₃ scale. Overall, both developmental alloys, with and without the addition of Nb, were found to exhibit superior properties than RR1000.

Original language	English
Pages (from-to)	1-12
Number of pages	12
Journal	Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Early online date	23 May 2018
DOIs	https://doi.org/10.1007/s11661-018-4682-4
Publication status	Published - 2018

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MPC: Materials Performance Centre
Burke, G. (PI), Engelberg, D. (PI), Preuss, M. (PI), Frankel, P. (PI), Jimenez-Melero, E. (PI), Pickering, E. (PI), Scenini, F. (PI), Stevens, N. (PI), Race, C. (PI), Connolly, B. (PI), Abdallah, M. (PGR student), Armson, S. (PGR student), Attar, H. (PGR student), Barron, P. (PGR student), Bird, J. (PGR student), Brown, A. (PGR student), Bruce, K. (PGR student), Buxton, O. (PGR student), Cassineri, S. (PGR student), Cattivelli, A. (PGR student), Chen, W. (PGR student), Collins, J. (PGR student), Debenham, L. (PGR student), Eaton-Mckay, J. (PGR student), Eguchi, K. (PGR student), Foster, D. (PGR student), Fox, C. (PGR student), Garrett, A. (PGR student), Gredis, A. (PGR student), Grime, T. (PGR student), Hou, J. (PGR student), Howe, B. (PGR student), Hughes, J. (PGR student), Hunt, C. (PGR student), Islam, U. (PGR student), Jalil, R. (PGR student), Jones, C. (PGR student), Kablan, A. (PGR student), Kapousidou, M. (PGR student), Koc, O. (PGR student), Kroll, R. (PGR student), Lang, R. (PGR student), Lennard, J. (PGR student), Liubercev, S. (PGR student), Mahmood, S. (PGR student), Maric, M. (PGR student), Martin, C. (PGR student), Mazzei, G. (PGR student), Rigby-Bell, M. (PGR student), Rogers, M. (PGR student), Sanchez, C. (PGR student), Shah, Z. (PGR student), Stavroulakis, E. (PGR student), Stuglik, P. (PGR student), Suleman, T. (PGR student), Supornpaibul, N. (PGR student), Thornley, S. (PGR student), Volpe, L. (PGR student), Wang, H. (PGR student), Wilson, M. (PGR student), Wilson, A. (PGR student), Woodward, T. (PGR student), Wylie, A. (PGR student), Xu, X. D. (PGR student), Yankova, M. (PGR student), Yildirim, E. (PGR student), Zhou, Y. (PGR student), Zhu, S. (PGR student), Barzdajn, B. (CoI), Carruthers, A. (CoI), Cassineri, S. (CoI), Chang, L. (CoI), Obasi, G. (CoI), Palko, S. (CoI), Reccagni, P. (CoI), Tang, R. (CoI), Thomas, R. (CoI), Unnikrishnan, R. (CoI), Zhang, Z. (CoI), Zhou, Y. (CoI) & Aspinall, A. (Support team)
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Christofidou, K. A., Hardy, M. C., Li, H. Y., Argyrakis, C., Kitaguchi, H., Jones, N. G., Mignanelli, P. M., Wilson, A. S., Messé, O. M. D. M., Pickering, E. J., Gilbert, R. J., Rae, C. M. F., Yu, S., Evans, A., Child, D., Bowen, P., & Stone, H. J. (2018). On the Effect of Nb on the Microstructure and Properties of Next Generation Polycrystalline Powder Metallurgy Ni-Based Superalloys. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 1-12. https://doi.org/10.1007/s11661-018-4682-4

@article{f47a11625a4d4217909b97529892e5ea,

title = "On the Effect of Nb on the Microstructure and Properties of Next Generation Polycrystalline Powder Metallurgy Ni-Based Superalloys",

abstract = "The effect of Nb on the properties and microstructure of two novel powder metallurgy (P/M) Ni-based superalloys was evaluated, and the results critically compared with the Rolls-Royce alloy RR1000. The Nb-containing alloy was found to exhibit improved tensile and creep properties as well as superior oxidation resistance compared with both RR1000 and the Nb-free variant tested. The beneficial effect of Nb on the tensile and creep properties was due to the microstructures obtained following the post-solution heat treatments, which led to a higher γ′ volume fraction and a finer tertiary γ′ distribution. In addition, an increase in the anti-phase-boundary energy of the γ′ phase is also expected with the addition of Nb, further contributing to the strength of the material. However, these modifications in the γ′ distribution detrimentally affect the dwell fatigue crack-growth behavior of the material, although this behavior can be improved through modified heat treatments. The oxidation resistance of the Nb-containing alloy was also enhanced as Nb is believed to accelerate the formation of a defect-free Cr2O3 scale. Overall, both developmental alloys, with and without the addition of Nb, were found to exhibit superior properties than RR1000.",

author = "Christofidou, {Katerina A.} and Hardy, {Mark C.} and Li, {Hang Yue} and Christos Argyrakis and Hiroto Kitaguchi and Jones, {Nicholas G.} and Mignanelli, {Paul M.} and Wilson, {Alison S.} and Mess{\'e}, {Olivier M.D.M.} and Pickering, {Ed J.} and Gilbert, {Robert J.} and Rae, {Cathie M.F.} and Suyang Yu and Alex Evans and Daniel Child and Paul Bowen and Stone, {Howard J.}",

year = "2018",

doi = "10.1007/s11661-018-4682-4",

language = "English",

pages = "1--12",

journal = "Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science",

issn = "1073-5623",

publisher = "Springer Boston",

}

Christofidou, KA, Hardy, MC, Li, HY, Argyrakis, C, Kitaguchi, H, Jones, NG, Mignanelli, PM, Wilson, AS, Messé, OMDM, Pickering, EJ, Gilbert, RJ, Rae, CMF, Yu, S, Evans, A, Child, D, Bowen, P & Stone, HJ 2018, 'On the Effect of Nb on the Microstructure and Properties of Next Generation Polycrystalline Powder Metallurgy Ni-Based Superalloys', Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, pp. 1-12. https://doi.org/10.1007/s11661-018-4682-4

On the Effect of Nb on the Microstructure and Properties of Next Generation Polycrystalline Powder Metallurgy Ni-Based Superalloys. / Christofidou, Katerina A.; Hardy, Mark C.; Li, Hang Yue et al.
In: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 2018, p. 1-12.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - On the Effect of Nb on the Microstructure and Properties of Next Generation Polycrystalline Powder Metallurgy Ni-Based Superalloys

AU - Christofidou, Katerina A.

AU - Hardy, Mark C.

AU - Li, Hang Yue

AU - Argyrakis, Christos

AU - Kitaguchi, Hiroto

AU - Jones, Nicholas G.

AU - Mignanelli, Paul M.

AU - Wilson, Alison S.

AU - Messé, Olivier M.D.M.

AU - Pickering, Ed J.

AU - Gilbert, Robert J.

AU - Rae, Cathie M.F.

AU - Yu, Suyang

AU - Evans, Alex

AU - Child, Daniel

AU - Bowen, Paul

AU - Stone, Howard J.

PY - 2018

Y1 - 2018

N2 - The effect of Nb on the properties and microstructure of two novel powder metallurgy (P/M) Ni-based superalloys was evaluated, and the results critically compared with the Rolls-Royce alloy RR1000. The Nb-containing alloy was found to exhibit improved tensile and creep properties as well as superior oxidation resistance compared with both RR1000 and the Nb-free variant tested. The beneficial effect of Nb on the tensile and creep properties was due to the microstructures obtained following the post-solution heat treatments, which led to a higher γ′ volume fraction and a finer tertiary γ′ distribution. In addition, an increase in the anti-phase-boundary energy of the γ′ phase is also expected with the addition of Nb, further contributing to the strength of the material. However, these modifications in the γ′ distribution detrimentally affect the dwell fatigue crack-growth behavior of the material, although this behavior can be improved through modified heat treatments. The oxidation resistance of the Nb-containing alloy was also enhanced as Nb is believed to accelerate the formation of a defect-free Cr2O3 scale. Overall, both developmental alloys, with and without the addition of Nb, were found to exhibit superior properties than RR1000.

AB - The effect of Nb on the properties and microstructure of two novel powder metallurgy (P/M) Ni-based superalloys was evaluated, and the results critically compared with the Rolls-Royce alloy RR1000. The Nb-containing alloy was found to exhibit improved tensile and creep properties as well as superior oxidation resistance compared with both RR1000 and the Nb-free variant tested. The beneficial effect of Nb on the tensile and creep properties was due to the microstructures obtained following the post-solution heat treatments, which led to a higher γ′ volume fraction and a finer tertiary γ′ distribution. In addition, an increase in the anti-phase-boundary energy of the γ′ phase is also expected with the addition of Nb, further contributing to the strength of the material. However, these modifications in the γ′ distribution detrimentally affect the dwell fatigue crack-growth behavior of the material, although this behavior can be improved through modified heat treatments. The oxidation resistance of the Nb-containing alloy was also enhanced as Nb is believed to accelerate the formation of a defect-free Cr2O3 scale. Overall, both developmental alloys, with and without the addition of Nb, were found to exhibit superior properties than RR1000.

U2 - 10.1007/s11661-018-4682-4

DO - 10.1007/s11661-018-4682-4

M3 - Article

AN - SCOPUS:85047246775

SN - 1073-5623

SP - 1

EP - 12

JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

ER -

On the Effect of Nb on the Microstructure and Properties of Next Generation Polycrystalline Powder Metallurgy Ni-Based Superalloys

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