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1 Zeszyty Naukowe. Mechanika / Politechnika Opolska

1 2005

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Cyclic strain localization in cast nickel based superalloy INCONEL 792-5A at room temperature

Petrenec M., Man J., Obrtlík K., Polák J.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

2005

z. 86

269-274

Cylindrical specimens of cast polycrystalline superalloy INCONEL 792-5A were cyclically strained under total strain control at room temperature up to fracture. Cyclic hardening curves were documented. Dislocation structure was studied with the technique of oriented foils in TEM. SEM was used to investigate surface relief topography. The cyclic stress-strain response is characterized by initial hardening followed by the stabilized stress response. Surface persistent slip markings and slip bands lying along {111} planes in the interior of grains cut both channels and precipitates. Experimental results concerning the surface relief and dislocation structure are used to discuss the stress-strain response.