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http://dx.doi.org/10.7842/kigas.2011.15.4.021

Evaluation of Fracture Toughness Using Small Punch Test for Aluminum 6061-T6 Type-3 Cylinder Liner  

Ma, Young-Wha (Dept. of Mechanical Engineering, Chung Ang University)
Lee, Seong-Hoon (Dept. of Mechanical Engineering, Chung Ang University)
Yoon, Kee-Bong (Dept. of Mechanical Engineering, Chung Ang University)
Publication Information
Journal of the Korean Institute of Gas / v.15, no.4, 2011 , pp. 21-26 More about this Journal
Abstract
Type-3 cylinder liner has a limitation of machining the standard specimen for fracture toughness test because it has approximately 5 mm in thickness as well as a curvature. Hence, it needs to be employed a miniature specimen test technique to evaluate fracture toughness of the cylinder liner. In this study, small punch (SP) test method was employed to evaluate fracture toughness of the cylinder liner. Load-displacement curve result measured from the SP test showed that the liner material was failed during membrane stretching in the general SP load-displacement curve. Additionally, it was shown that liner material was isotropic although the amount of plastic deformation was different depending on the direction due to manufacturing process characteristics. Fracture toughness, $J_{Ic}$, was evaluated using the SP test data. The value of fracture toughness obtained was $13.0kJ/m^2$. This value was similar to that of the same kind of materials. Therefore, the fracture toughness evaluated using the SP test data was reasonable.
Keywords
small punch test; fracture toughness; aluminum 6061-T6; Type-3 cylinder; liner;
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