High Temperature Low Cycle Fatigue Characteristics of Grit Blasted Polycrystalline Ni-Base Superalloy

Ivo Šulák; Karel Obrtlík; Ladislav Čelko

doi:10.4028/www.scientific.net/KEM.665.73

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High Temperature Low Cycle Fatigue Characteristics of Grit Blasted Polycrystalline Ni-Base Superalloy

Abstract:

The present work is focused on the study of low cycle fatigue behavior of grit blasted nickel-base superalloy Inconel 713LC (IN 713LC). Grit blasting parameters are obtained. Button end specimens of IN 713LC in as-received condition and with grit blasted surface were fatigued under strain control with constant total strain amplitude in symmetrical cycle at 900 °C in air. Hardening/softening curves, cyclic stress-strain curve and fatigue life data of both materials were obtained. Both materials exhibit the same stress-strain response. It has not been observed any improvement or reduction of low cycle fatigue life in representation of total strain amplitude versus number of cycles to failure of grit blasted material in comparison with as-received material. Surface relief and fracture surface were observed in SEM. The little effect of surface treatment on fatigue characteristics is discussed.

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Periodical:

Key Engineering Materials (Volume 665)

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73-76

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.665.73

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Online since:

September 2015

Authors:

Ivo Šulák, Karel Obrtlík, Ladislav Čelko

Keywords:

Cyclic Stress-Strain Response, Fatigue Life, Grit Blasting, High Temperature Fatigue, In 713LC

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References

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