Effects of Ageing and Forging on Short-term Creep Behaviors of Inconel-713C Superalloy at 850 °C

Document Type : Original Article

Authors

1 Faculty of Materials and Metallurgical Engineering, Semnan University, Semnan, Iran

2 Faculty of Mechanical Engineering, Semnan University, Semnan, Iran

Abstract

In this paper, the short-term creep behavior of the Inconel-713C superalloy after different pre-treatments including the ageing and forging processes has been studied at 850 °C. The ageing heat treatment was heating at 930 °C for 16 hours without solutioning process. The optical microscopy (OM) and the scanning electron microscopy (SEM) techniques were applied for microstructural evaluations. The results showed that although the ageing treatment increased the γ’ phase content, the age-hardened material had a lower creep lifetime (about 40%) with respect to the as-cast alloy. This was related to the decrease in the amount of M23C6-type secondary carbides precipitation. When the Inconel-713C superalloy specimen was forged at 1200 °C, the third stage of the creep curve (strain versus time) increased drastically and shortened the creep lifetime. The small grain size of the forged specimen was responsible for such inverse creep behavior. In addition, fractographs of this specimen indicated intragranular cracks on the ruptured surface. When the forged sample was age-hardened directly without the solutioning treatment, the creep lifetime increased about 4 times as compared to the forged specimen.

Keywords

References

 
1. Zupanic, F., Boncina, T., Krizman, A., Tichelaar, F.D., “Structure 
of continuously cast Ni-based superalloy Inconel 713C”, Journal
of Alloys and Compounds, Vol. 329, (2001), 290-297. 
2. Azadi, M., Iziy, M., Marbout, A., Azadi, M., Rizi, M.H., 
“Investigation of the heat treatment effect on microstructures and
phases of inconel 713c superalloy”, International Journal of
Engineering Transaction A: Basics, Vol. 30, No. 10, (2017)
1538-1544. 
3.  Lee, J.W., Kim, D.J., Hong, H.U., “A new approach to strengthen
grain boundaries for creep improvement to a Ni-Cr-Co-Mo
superalloy at 950°C”, Materials Science and Engineering A,
Vol. 625, (2015), 164-168. 
4.  Mei, Y., Liu, Y., Liu, C., Li, C., Yu, L., Guo, Q., Li, H.,  “Effects
of cold rolling on the precipitation kinetics and the morphology
evolution of intermediate phases in Inconel 718 alloy”, Journal
of Alloys and Compounds, Vol. 649, (2015), 949-960. 
5. Dirbude, S.B., Maurya, V.K., “Effect of uniform magnetic field
on melting at various rayleigh numbers”, Emerging Science
Journal, Vol. 3, No. 4, (2019), 263-273.  
6. Su, Y., Li, X., Wu, X., “Evaluation of load-bearing performance
of existing cast steel node”, Civil Engineering Journal, Vol. 3,
No. 2, (2017), 88-94.   
7. Azadi, M., Iziy, M., Marbout, A., Azadi, M., Hajiali Mohammadi
A., “Optimization of solution temperature and time in nickelbased
super-alloy of engine turbo-charger based on hardness by design of experiments”, The Journal of Engine Research, Vol.43,(2016),63-70.

8. Kuo, C.M., Yang, Y.T., Bor, H.Y., Wei, C.N., Tai, C.C., “Aging
effects on the microstructure and creep behavior of Inconel 718
superalloy”, Materials Science and Engineering A, Vol. 510511, (2009), 289-294.
9. Caliari, F.R., Candioto, K.C.G., Couto, A.A., Nunes, C.N., Reis,
D.A.P., “Effect of double aging heat treatment on the short-Term
creep behavior of the Inconel 718”, Journal of Materials
Engineering and Performance, Vol. 25, (2016), 2307-2317. 
10. Chomette, S., Gentzbittel, J.M., Viguier, B., “Creep behavior of
as received, aged and cold worked Inconel 617 at 850 °C and 950
°C”, Journal of Nuclear Materials, Vol. 399, (2010), 266-274. 
11. Wen, D.X., Lin, Y.C., Chen, J., Deng, J., Chen, X.M., Zhang, J.L.,
He, M., “Effects of initial aging time on processing map and
microstructures of a nickel-based superalloy”, Materials Science
and Engineering A, Vol. 620, (2015), 319-332. 
12. Chamanfar, A., Sarrat, L., Jahazi, M., Asadi, M., Weck, A., Koul,
A.K., “Microstructural characteristics of forged and heat treated
Inconel-718 disks”, Materials and Design, Vol. 52, (2013), 791800.
13. Li, H.Y., Kong, Y.H., Chen, G.S., Xie, L.X., Zhu, S.G., Sheng,
X., “Effect of different processing technologies and heat
treatments on the microstructure and creep behavior of GH4169
superalloy”, Materials Science and Engineering A, Vol. 582,
(2013), 368-373. 
14. Probstle, M., Neumeier, S., Feldner, P., Rettig, R., Helmer, H.E.,
Singer, R.F., Goken, M., “Improved creep strength of nickel-base
superalloys by optimized γ/γ′ partitioning behavior of solid
solution strengthening elements”, Materials Science and
Engineering A, Vol. 676, (2016), 411-420.  
15. Zhao, X., Dang, Y., Yin, H., Yuan, Y., Lu, J., Yang, Z., Gu, Y.,
“Evolution of the microstructure and microhardness of a new
wrought Ni–Fe based superalloy during high temperature aging”,
Journal of Alloys and Compounds, Vol. 644, (2015), 66-70. 
16. Shin, Z., J. Li, S. Liu, “Effect of long term aging on
microstructure and stress rupture properties of a nickel based
single crystal superalloy”, Progress in Natural Science:
Materials International, Vol. 22, (2012), 426-432.  
17. Pokluda, J., Obrtlik, K., Slamecka, K., Hornikova, J., Kianicova,
M., “Fatigue life of cast Inconel 713LC with/without protective
diffusion coating under bending”, torsion and their combination,
ESIS TC2 (Micro mechanisms), Oxford (2012) 
18. Azadi, M., Azadi, M., “Evaluation of high-temperature creep
behavior in Inconel-713C nickel-based superalloy considering
effects of stress levels”, Materials Science and Engineering A,
Vol. 689, (2017), 298-305. 
19. Azadi, M., Marbout, A., Safarloo, S., Azadi, M., Shariat, M, Rizi,
M.H., Effects of solutioning and ageing treatments on properties
of Inconel-713C nickel-based superalloy under creep loading”,
Materials Science and Engineering A, Vol. 711, (2018), 195204.
20. Bahmanabadi, H., Rezanezhad, S., Azadi, M., Azadi, M.,
“Characterization of creep damage and lifetime in Inconel-713C
nickel based superalloy by stress-based, strain/strain rate-based
and continuum damage mechanics models”, Materials Research
Express, Vol. 5, (2018), 026509.  
21. Shingledecker, J.P., Evans, N.D., Pharr, G.M., “Influences of
composition and grain size on creep-rupture behavior of Inconels 
International Journal of Engineering
Volume 33, Issue 4
TRANSACTIONS A: Basics
April 2020
Pages 639-646

Files

Cited by

Share

How to cite

Statistics