DING Kunying, WANG Lijun. Bending fatigue behaviors of the Inconel 718 alloy with a WC-17Co coating at different temperatures[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(2): 87-90.
Citation:
DING Kunying, WANG Lijun. Bending fatigue behaviors of the Inconel 718 alloy with a WC-17Co coating at different temperatures[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(2): 87-90.
DING Kunying, WANG Lijun. Bending fatigue behaviors of the Inconel 718 alloy with a WC-17Co coating at different temperatures[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(2): 87-90.
Citation:
DING Kunying, WANG Lijun. Bending fatigue behaviors of the Inconel 718 alloy with a WC-17Co coating at different temperatures[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2014, 35(2): 87-90.
School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;Tianjin Key Laboratory of Advanced Joining Technology, Tianjin 300072, China
The WC-17Co coating was deposited on the Inconel 718 alloy by high-velocity oxygen fuel (HVOF) thermal spray method. The phase composition and fracture of WC-17Co coatings were investigated by XRD method and SEM,respectively. The bending fatigue behaviors of cantilever specimens were also discussed. The effects of ambient temperature (25,150, 300℃) on the bending fatigue life were studied in this paper as well. The results showed that fatigue cracks were initiated on the surface coating,then propagated toward the substrate/coating interface, and finally penetrated into the substrate. The bending fatigue life of the coated specimen decreased with the increase of ambient temperature. The average compressive residual stress of WC-17Co coatings decreased after heat treatment. Therefore,a higher crack-propagation rate was induced in the surface coating, resulting in the lower fatigue life of the coated specimen.
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