Fatigue strength of MAR-M509 alloy with structure refined by rapid crystallization
Journal Title: Archiwum Odlewnictwa - Year 2010, Vol 10, Issue 3
Abstract
This study presents test results of high-cycle (N>2⋅107) fatigue bending strength of MAR-M-509 cobalt alloy samples, as cast and after surface refining with a concentrated stream of heat. Tests were conducted on samples of MAR-M59 alloy casts, obtained using the lostwax method. Cast structure refining was performed with the GTAW method in argon atmosphere, using the current I = 200 A and electrical arc scanning velocity vs = 250 mm/min. The effect of rapid crystallization occurring after the fusion process is refinement of the MAR-M509 alloy cast microstructure and significant improvement in bending fatigue strength.
Authors and Affiliations
M. Mróz, W. Orłowicz, A. Trytek
Keywords
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