Abstract
Cylindrical specimens of Inconel 713LC in untreated condition and surface treated with Al and Al-Si diffusion coating were cyclically strained under strain control at 800 ̊C in air. The structural and hardness characteristics of the hardened surface layer are presented. Cyclic hardening/softening curves, cyclic stress-strain curves, and fatigue life curves are obtained. The sections parallel to the specimen axis have been examined to study fatigue damage mechanisms. The effect of Al coating on stress response and fatigue life slightly differs from that of Al-Si coating.
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