Influence of Al-Si Diffusion Coating on Low Cycle Fatigue Properties of Cast Superalloy Inconel 738LC at 800 °C

Martin Juliš; Karel Obrtlík; Simona Hutařová; Tomáš Podrábský; Jaroslav Polák

doi:10.4028/www.scientific.net/KEM.488-489.307

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 488-489Influence of Al-Si Diffusion Coating on Low Cycle...

Influence of Al-Si Diffusion Coating on Low Cycle Fatigue Properties of Cast Superalloy Inconel 738LC at 800 °C

Abstract:

High temperature low cycle fatigue behaviour of cast nickel-based superalloy Inconel 738LC in as-received condition and coated with an Al-Si diffusion layer was studied. The Al-Si protective layer was deposited on the gauge section of cylindrical specimens using the slurry technique. Fatigue tests were performed on cylindrical specimens under total strain control in symmetrical cycle at 800 °C in air. The coating has a beneficial effect on fatigue life in the low amplitude domain. The stress response of the coated material is higher for high amplitudes in comparison with the uncoated one. Fracture surfaces and sections parallel to the specimen axis have been examined to study fatigue damage mechanisms.

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Periodical:

Key Engineering Materials (Volumes 488-489)

Pages:

307-310

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.488-489.307

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Online since:

September 2011

Authors:

Martin Juliš, Karel Obrtlík, Simona Hutařová, Tomáš Podrábský, Jaroslav Polák

Keywords:

Cyclic Hardening/Softening Curve, Cyclic Stress-Strain Curve, Diffusion Coating, Fatigue Life, High-Temperature, Inconel 738LC, Low Cycle Fatigue

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References

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