TY - JOUR
T1 - The effect of fusing time on fatigue properties of thermally sprayed steel with Ni-based self-fluxing alloy
AU - Akebono, Hiroyuki
AU - Ito, Ryohei
AU - Fukumoto, Masahiro
AU - Komotori, Jun
AU - Shimizu, Masao
PY - 2004/6
Y1 - 2004/6
N2 - To investigate the effects of fusing conditions on the microstructures and on fatigue properties of thermally sprayed coating, three types of thermally sprayed specimen with different heating periods in the fusing process were prepared. Rotational bending fatigue tests and characterization of coating microstructures were carried out. By using a vacuum furnace for fusing, it is possible to get sprayed coating with very little porosity and high mechanical properties. Heating time in the fusing process strongly affects the fatigue properties; the longer the heating time, the lower the fatigue strength. This is because longer heating process induces a segregation of the chromium compound in the coated microstructures. In orier to achieve higher fatigue strength, shorter length fusing was performed by an induction heating system. However, the fatigue strength of the specimen is much lower than that of the vacuum furnace fused specimen. This is because a delamination between the coating layer and the substrate occurred during the fatigue process and the fatigue crack started at the newly created surfaces at the substrates.
AB - To investigate the effects of fusing conditions on the microstructures and on fatigue properties of thermally sprayed coating, three types of thermally sprayed specimen with different heating periods in the fusing process were prepared. Rotational bending fatigue tests and characterization of coating microstructures were carried out. By using a vacuum furnace for fusing, it is possible to get sprayed coating with very little porosity and high mechanical properties. Heating time in the fusing process strongly affects the fatigue properties; the longer the heating time, the lower the fatigue strength. This is because longer heating process induces a segregation of the chromium compound in the coated microstructures. In orier to achieve higher fatigue strength, shorter length fusing was performed by an induction heating system. However, the fatigue strength of the specimen is much lower than that of the vacuum furnace fused specimen. This is because a delamination between the coating layer and the substrate occurred during the fatigue process and the fatigue crack started at the newly created surfaces at the substrates.
KW - Fatigue
KW - Fracture Mechanism
KW - Fusing Time
KW - Ni-Based Self-Fluxing Alloy
KW - Segregation
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U2 - 10.1299/kikaia.70.843
DO - 10.1299/kikaia.70.843
M3 - Article
AN - SCOPUS:4344606585
SN - 0387-5008
VL - 70
SP - 843
EP - 849
JO - Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
JF - Nippon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
IS - 6
ER -