Fatigue Behavior of GH4169 Alloy up to Very High Cycles

Abstract:

The present paper deals with experimental studies on the long life fatigue behavior of GH4169 alloy. Using the ultrasonic fatigue testing technique, specimens of hourglass shape were fatigue tested in air at room temperature under fully reversed cyclic loading conditions (R=-1). The very high cycle fatigue property of GH4169 alloy was studied and the initiation mechanisms of fatigue cracks were investigated and analyzed with scanning electron microscopy (SEM) and energy dispersive atomic X-ray (EDX). Preliminary results indicate that the S-N curve displays a bilinear decreasing tendency within 10⁹ cycles and fatigue failure initiates from inclusions/defects on the specimen surface.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 928-931
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.928
• Online since: June 2012
• Authors: Xiao Zhao, Jian Jun Zhao, Yong Jie Liu
• Keywords: Crack Initiation, GH4169 Alloy, S-N Curve, Very High Cycle Fatigue (VHCF)

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