Influence of Hold Times on Fatigue Life and Fracture Behavior of Cast Superalloy INCONEL 713LC at 700°C

0332380 - ÚFM 2010 CA eng C - Conference Paper (international conference)
Obrtlík, Karel - Man, Jiří - Petrenec, Martin - Polák, Jaroslav - Podrábský, T.
Influence of Hold Times on Fatigue Life and Fracture Behavior of Cast Superalloy INCONEL 713LC at 700°C.
Proceedings of 12th International Conference on Fracture. Ottawa: NRCan - CANMET, 2009, s. 1-9. ISBN N.
[International Conference on Fracture /12./. Ottawa (CA), 12.07.2009-17.07.2009]
R&D Projects: GA AV ČR 1QS200410502; GA ČR GA106/08/1631; GA ČR GA106/07/1507
Institutional research plan: CEZ:AV0Z20410507
Keywords : Fatigue life * Hold times * High temperature * Inconel 713LC
Subject RIV: JL - Materials Fatigue, Friction Mechanics
http://www.icf12.org/

Influence of tensile strain holds on fatigue life and fracture behavior in cast nickel-based superalloy INCONEL 713 LC was studied under symmetrical total strain cycling at 700 °C in air. Structure of the superalloy is documented. Continuous cycling and cycling with 10 min dwell in the tensile tip of the hysteresis loop were applied to cylindrical specimens. Surface topography, fracture surface and specimen sections were observed in SEM. Fatigue life in Manson-Coffin and Basquin representation in cycling with dwells is reduced in comparison with continuous cycling. Pure fatigue and pure creep data are used to analyze the fatigue damage with dwells. Surface relief and fracture surface observations reveal the change in damage mechanisms with the introduction of dwells. Density of slip markings in cycling with dwells decreases in comparison with continuous cycling. The life reduction due to dwells is discussed with respect to fatigue interaction with creep and environment.
Permanent Link: http://hdl.handle.net/11104/0177659