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Influence of Dynamic Strain Ageing and Long Term Ageing on Deformation and Fracture Behaviors of Alloy 617

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Abstract:

Influences of dynamic strain ageing and long term ageing on deformation, damage and fracture behaviors of Alloy 617 material have been studied. Dynamic strain ageing can occur in this alloy at temperature from 400 to 700°C, which leads to a strain hardening and also an increase in fracture strain due to plastic deformation caused by twinning. Long term ageing at 700°C for up to 20 000 hours can cause different precipitation such as γ ́, M6C (Mo-rich) and M23C6 (Cr-rich) carbides. These carbides are both inter-and intra-granular particles. The long term ageing reduces the fracture toughness of the material, but the alloy can still have rather high impact toughness and fracture toughness even with an ageing at 700°C for 20 000 hour. The mechanisms have been studied using electron backscatter detection and electron channeling contrast imaging. It shows that besides dislocation slip, twinning is another main deformation mechanism in these aged Alloy 617 materials. At the crack front, plenty of micro or nanotwins can be observed. The formation of these twins leads to a high ductility and toughness which is a new observation or a new concept for this type of material.

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Periodical:

Materials Science Forum (Volume 879)

Pages:

306-311

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.879.306

Citation:

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Online since:

November 2016

Authors:

Guo Cai Chai*, Mattias Calmunger, Sten Johansson, Johan Moverare, Joakim Odqvist

Keywords:

Twinning, Aging, Fracture Toughness, Microstructure, Nickel Based Superalloy

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* - Corresponding Author

References

[1] J. Pettersson, H. Asteman, J. Svensson and L. Johansson: Oxidation of Metals. Vol. 64 (2005), p.23.

Google Scholar

[2] R. Viswanathan, K. Coleman and U. Rao: Int. J. Pressure Vessels Piping. Vol. 83 (2006), p.778.

Google Scholar

[3] K. Gopinatha, A.K. Gogia, S.V. Kamat and U. Ramamurty: Acta Materialia Vol. 57 (2009), p.1243.

Google Scholar

[4] C.Y. Cui, C.G. Tian, Y.Z. Zhou, T. Jin and X.F. Sun: Dynamic Strain Aging in Ni Base Alloys with Different Stacking Fault Energy, in CD room Superalloy 2012, E1.

DOI: 10.7449/2012/superalloys_2012_715_722

Google Scholar

[5] A. Portevin and F. Le. Chatelier: C. R. Acad. Scie., Paris, Vol. 176 (1923), p.507.

Google Scholar

[6] J.M. Robinson and M.P. Shaw: International Material Review, Vol. 39, No. 3, 1994, p.113.

Google Scholar

[7] V. Venkatesh, V. Marthandam and A. K. Roy, Tensile deformation and fracture toughness characterization of Alloy 617 and 718, Proc. Of SEM 2007, s25p07, (2007).

Google Scholar

[8] J. Benz, Th. Lillo and R. Wright, Aging of Alloy 617 at 650 and 750°C, INL/EXT-12-27974, 2013, Idaho National Laboratory.

DOI: 10.2172/1070122

Google Scholar

[8] M. Calmunger, G. Chai, S. Johansson and J. Moverare: Influence of dynamic strain ageing on damage in austenitic stainless steels, CD room, proc. ECF 19, (2012).

Google Scholar

[9] L.H. de Almeida, I. Le May, P.R.O. Emygdio: Mater Charact. 41 (1998) 137-150.

Google Scholar

[10] W. Karlsen, M. Ivanchenko, U. Ehrnstén, Y. Yagodzinskyy, H. Hänninen: J. Nucl. Mater. 395 (2009) 156-161.

DOI: 10.1016/j.jnucmat.2009.10.047

Google Scholar

[11] J. K. Wright, L. J. Carroll, C. J. Cabet, T. Lillo, J. K. Benz, J. A. Simpson, W. R. Lloyd, J. A. Chapman, and R. N. Wright, Characterization of Elevated Temperature Properties of Heat Exchanger and Steam Generator Alloys, Proceedings of HTR 2010, paper 31, 2010. Prague, Czech Republic.

DOI: 10.1016/j.nucengdes.2011.10.034

Google Scholar

[12] A. K. Roy, V. Marthandam: Materials Science and Engineering A, 517 (2009) 276–280.

Google Scholar

[13] I. Gutierrez-Urrutia, S. Zaefferer, D. Raabe: Scr. Mater. Vol. 61 (2009), p.737.

Google Scholar

[14] Q. Wu, H. Song, R. W. Swindeman, J. P. Shingledecker and V. K. Vasudevan: Metall. Mater. Trans. A, 39A (2008) 2569–2585.

Google Scholar

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