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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Effect of plasma sprayed AlSi coating on low cycle fatigue properties of cast superalloy Inconel 738LC
 Obrtlík, Karel ; Pospíšilová, S. ; Juliš, M. ; Čelko, L. ; Podrábský, T.
Air plasma spraying was applied to obtain AlSi protective surface coating on cylindrical specimens of cast polycrystalline superalloy Inconel 738LC. Chemical composition of the surface treated layer was studied and the hardness depth profile was measured. Surface treated and untreated specimens were cyclically strained under total strain control at 800 °C in air. Cyclic stress-strain response and fatigue life of both materials were obtained. The coating results in a slight decrease of cyclic stress-strain curve. A detrimental effect of the surface treatment on derived Wöhler curve is documented while Manson-Coffin curves of both materials are almost identical. Specimen section observations and fracture surface examinations help to discuss fatigue behaviour of both materials.
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