Thermal fatigue behaviour of Al–Si coated Inconel 713 LC

Abstract

The effect of single and two-stage Si modified aluminide coatings on thermal fatigue behaviour of nickel based superalloy Inconel 713LC was examined. Specimens were loaded under test condition of heating to 1100°C followed by cooling to25°C. The experimental results showed that the coatings increased thermal fatigue resistance in both crack initiation and propagation stages. The comparison of the crack growth rates indicated that both coatings imparted resistance to the crack lengthening. However, the effect of single stage coating on the fatigue resistance was superior compared with that of two-stage coating. Through scanning electron microscopy observation, it was found that the width of γ′ denuded zone was the main reason in the control of crack growth in all specimens.

Keywords

Thermal fatigue Inconel 713LC Al–Si diffusion coating crack initiation γ′ denuded zone

Get full access to this article

View all access options for this article.

References

Kunz

, Lukáš

, Konečná

and Fintová

: ‘Casting defects and high temperature fatigue life of IN 713LC superalloy’, Int. J. Fatigue, 2012, 41, 47–51.

Tamarin

: ‘Protective coatings for turbine blades’; 2002, Materials Park, OH, ASM International.

Rajendran

: ‘Gas turbine coatings – an overview’, Eng. Fail. Anal., 2012, 26, 355–369.

Yang

, Wu

, Li

, Ma

and Gong

: ‘Microstructure and oxidation behavior of modified aluminide coating on Ni3Al-based single crystal superalloy’, Chin. J. Aeronaut., 2012, 25, 825–830.

, Yang

, Wu

, Li

, Ma

and Gong

: ‘A comparative study of four modified Al coatings on Ni3Al-based single crystal superalloy’, Prog. Nat. Sci. Mater. Int., 2011, 21, 496 − 505.

Shirvani

, Saremi

, Nishikata

and Tsuru

: ‘The role of silicon on microstructure and high temperature performance of aluminide coating on superalloy IN-738LC’, Mater. Trans. A, 2002, 43A, 2622–2628.

Arabi

, Rastegari

, Salehpour

and Bakhshi

: ‘Formation mechanism of silicon modified aluminide coating applied on a nickel base super alloy IN-738 LC’, Int. J. Eng. Sci., 2008, 19, 39–44.

Xiang

Z. D.

and Datta

P. K.

: ‘Codeposition of Al and Si on nickel base superalloys by pack cementation processes’, Mater. Sci. Eng. A, 2003, A356, 44–136.

Houngninou

, Chevalier

and Larpin

J. P.

: ‘Synthesis and characterisation of pack cemented aluminide coatings on metals’, Appl. Surf. Sci., 2004, 236, 256–269.

10.

Woodford

D. A.

and Mowbray

D. F.

: ‘Effect of material characteristics and test variables on thermal fatigue of cast superalloys’, Mater. Sci. Eng. A, 1974, A16, 5–43.

11.

Y. L.

, Yuan

and Guo

J. T.

: ‘Thermal fatigue behaviors of cast nickel-base superalloys K445’, Acta Metall. Sin., 2006, 42, 1056–1060.

12.

Yang

, Zheng

, Sun

, Guan

and Hu

: ‘Thermal fatigue behavior of K465 superalloy’, Rare Met., 2006, 25, 202–210.

13.

Reuchet

and Remy

: ‘High temperature low cycle fatigue MAR-M509 superalloy. I: the influence of temperature on the low cycle fatigue behaviour from 20 to 1100°C’, Mater. Sci. Eng., 1983, 58, 1–19.

14.

Xia

, Yang

, Yu

, Sun

, Guan

and Hu

: ‘Influence of direction of notch on thermal fatigue property of a directionally solidified nickel base superalloy’, Rare Met., 2011, 30, 472–476.

15.

Liu

, Yu

, Xu

, Sun

, Guan

and Hu

: ‘Crack growth behavior of SRR99 single crystal superalloy under thermal fatigue’, Rare Met., 2008, 27, 526–531.

16.

Meyer-Olbersleben

, Goldschmidt

and Rezai-Aria

: ‘Investigation of the thermal fatigue behavior of single-crystal nickel-based superalloy SRR99 and CMSX-4’, (ed. Antolovich

S. D.

., Proc. 7th Int. Symp. on ‘Superalloys’, 785–794; 1992, Warrendale, PA, TMS.

17.

Aziz

M. J.

: ‘Thermodynamics of diffusion under pressure and stress: relation to point defect mechanisms’, Appl. Phys. Lett., 1997, 70, 2810–2812.