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|Title:||Fabrication of an Al-4.5Cu/15SiC composite: II. Effects of the processing parameters on the fracture properties||Authors:||Lu, L.
|Issue Date:||Feb-1993||Citation:||Lu, L.,Kwok, J.K.M.,Lai, M.O.,Liu, Y.B.,Lim, S.C. (1993-02). Fabrication of an Al-4.5Cu/15SiC composite: II. Effects of the processing parameters on the fracture properties. Journal of Materials Processing Tech. 37 (1-4) : 453-462. ScholarBank@NUS Repository.||Abstract:||The mechanical properties of Al-based composites obtained from mechanical alloying Al-4.5 wt% Cu with 15 wt% SiC reinforcement (part I of this two-part paper) have been investigated. Test samples in the form of 67 mm diameter disks were employed to investigate the fracture properties of the composite using the fracture-mechanics approach. It was found that the fracture toughness of the composite decreased with mechanical alloying time due to the existence of porosity. From fractographic and metallographic studies using scanning electron microscopy, three types of fracture modes were observed, namely: (i) fracture of the SiC; (ii) fracture due to the coalescence of micro-voids in the matrix; and (iii) fracture due to debonding between the matrix and the SiC particles. Fracture due to debonding was found to be the dominating feature for the range of mechanical alloying times investigated. © 1993.||Source Title:||Journal of Materials Processing Tech.||URI:||http://scholarbank.nus.edu.sg/handle/10635/58273||ISSN:||09240136|
|Appears in Collections:||Staff Publications|
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