The Addition of Zr in Nickel-Based Inconel 718 Superalloy to Prevent Hot Cracks Propagation

Abstract:

The Inconel 718 alloy owes high strength and ductility at high temperature due to precipitation strengthening. In order to upgrade productility of Inconel 718 alloy, the Inconel 718 alloy solve hot crackings through Zr additions. The result shows that, the Inconel 718 alloy with Zr addition achieves grain size refinement and homogenization effect. It is suggested that, homogenization process, such as temperature point and time control, realizes low content of Nb segregation which is the key to prevent hot crackings. At the same time, through dendrite space measurement, the grain refinement realize high productivity of forged Inconel 718 alloy, as a another method of soft effect. In conclusion, adding Zr element is one of dominant methods for producing high quality of Inconel 718 alloy.

• Periodical: Key Engineering Materials (Volume 727)
• Pages: 3-8
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.727.3
• Online since: January 2017
• Authors: Heng Zhao, Qing Bin Liu, Gang Lee, Da Wei Yao
• Keywords: Grain Refinement, Homogenization, Hot Cracking, Inconel 718 Alloy, Nb Segregation, Zr Addition

References

[1] I. Woo, K. Nishimoto, K. Tanaka and M. Shirai, Characteristics of heat affected zone cracking in Inconel 718 cast alloy. Journal of Welding International, 14(5) (2000) 365.

DOI: 10.1080/09507110009549195

[2] Dong Hongbo and Wang Gaochao, Effect of Deformation Process on Superplasiticity of Inconel 718 alloy. Journal of Rare Metal Materials and Engineering, 49(2) (2015) 300-301.

DOI: 10.1016/s1875-5372(15)30023-0

[3] Yoichi Takizawa, Kenshi Otuka, Takahiro Masuda, Takahiro Kajita, Manabu Yumoto, Yoshiharu Otagiri and Zenji Horita, High-strain rate superplasticity of Inconel 718 through Grain Refinement by High Pressure Torsion. Journal of Materials Science and Engineering, A (2015).

DOI: 10.1016/j.msea.2015.09.023

[4] Yaocheng Zhang, Zhuguo Li, Pu-lin Nie and Yixiong Wu, Carbide and Nitride precipitation during laser cladding of Inconel 718 alloy coating. Journal of Optics and Laser Technology, 52 (2013) 30-36.

DOI: 10.1016/j.optlastec.2013.03.023

[5] H. Maderhacher, B. Oberwinkler, H.P. Ganser, W. Tan, M. Rollett and M. Stoschka, The influence of microstructure and operating temperature on the fatigue endurance of hot forged Inconel 718 components. Journal of Materials Science and Engineering, A, 585 (2013).

DOI: 10.1016/j.msea.2013.07.053

[6] K. Shinozaki, Welding and joining Fe and Ni-based Superalloys. Journal of welding international, 15(8) (2009) 596-597; 593-594.

DOI: 10.1080/09507110109549411

[7] K. Kulawik, P.A. Buffat, A. Kruk, A.M. Wusatowska and A. Czyraka-Filemonowicz, Imaging and characterization of γ' and γ' nanoparticles in Inconel 718 by EDX elemental mapping and FIB-SEM tomography. Journal of Materials Characterization, 100 (2015).

DOI: 10.1016/j.matchar.2014.12.012

[8] S.G.K. Manikandan, D. Sivakumar, K. PrasadRao and M. Kamaraj, Effect of weld cooling rate on Laves phase formation in Inconel 718 fusion zone. Journal of Materials Processing Technology, 214 (2014) 364.

DOI: 10.1016/j.jmatprotec.2013.09.006

[9] I. Woo, K. Nishimoto, K. Tamaka and M. Shirai, Effect of homogenization heat treatment on heat affected zone cracking suspectibility. Study of weldability of Inconel 718 cast alloy (3rd Report). Journal of Welding International, 14(7) (2000) 532.

DOI: 10.1080/09507110009549224

[10] W. Chen, M.C. Chaturvedi, N.L. Richards and G. McMahon, Grain boundary segregation of Boron in Inconel 718. Journal of Metallurgical and Materials Transactions, A, 29A (1997) 1947; (1954).

DOI: 10.1007/s11661-998-0020-6

[11] L. Xiao, D.L. Chen and M.C. Chaturvedi, Low cycle fatigue behavior of INCONEL 718 superalloy with different concentrations of boron at room temperature. Journal of Metallurgical and Materials Transactions, A, 36A (2005) 2683.

DOI: 10.1007/s11661-005-0264-3

[12] Yaocheng Zhang, Zhuguo Li, Pu-lin Nie and Yixiong Wu, Carbide and Nitride precipitation during laser cladding of Inconel 718 alloy coating. Journal of Optics and Laser Technology, 52 (2013) 30.

DOI: 10.1016/j.optlastec.2013.03.023