Machining Damage of Sintered Brittle Materials. (2nd Report). Effects of Machining Damage on Bending Strength of Cemented Carbide Cutting Tools

Autor:	Toshio Teshima, Toshiroh Shibasaka
Rok vydání:	1992
Předmět:	Fracture toughness Materials science Cutting tool Flexural strength Machining Mechanical Engineering Metallurgy Cemented carbide Fracture mechanics Grinding wheel Composite material Grinding
Zdroj:	Journal of the Japan Society for Precision Engineering. 58:81-86
ISSN:	1882-675X 0912-0289
DOI:	10.2493/jjspe.58.81
Popis:	This investigation examines the surface crack and the residual stress causea by machining of cemented carbides used for cutting tool. These were evaluated from the bending strength, the microcrack length and the fracture toughness on the basis of fracture mechanics by using the transverse rupture test. Within tested materials, the surface crack length was 6 to 20μm. This value was smaller than thickness of deformed layer acting compresive residual stress. It is found that the surface crack length decreases with decrease in grain size of grinding wheel, and with decrease in depth of cut in grinding operation. Therefore the bending strength increases with decreasing grain size and depth of cut.
Databáze:	OpenAIRE
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