Fracture toughness behaviour of a magnesium alloy metal-matrix composite produced by the infiltration technique |
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| Affiliation: | 1. Department of Metallurgical Engineering, Sharif University of Technology, Teheran, Iran;2. Institut für Werkstoffkunde und Werkstofftechnik, Technische Universität Clausthal, Agricolastraβe 6, D-3392 Clausthal-Zellerfeld, West Germany;1. Key Laboratory of Precision Opto-mechatronics Technology, Ministry of Education, Beihang University, Beijing 100191, China;2. College of Applied Sciences, Beijing University of Technology, 100 Pingleyuan Road, Beijing 100124, China;1. Department of Materials Science and Engineering, Anadolu University, Eskisehir 26555, Turkey;2. Department of Materials Science and Engineering, Cankaya University, Ankara 06790, Turkey |
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| Abstract: | Metal-matrix composites comprising short δ-alumina fibres embedded in an Mg 10Al0.4Zn alloy were produced by the squeeze infiltration process, with a fibre volume fraction of 20%. Tensile, hardness and fracture toughness tests were performed at room temperature on both the alloy matrix and the composite in the as-cast as well as in the T6 heat-treated condition. In the as-cast condition it was found that the composite had a markedly increased stiffness, tensile strength and hardness but slightly lower ductility and fracture toughness than the alloy matrix. Whilst a T6 heat treatment improved the mechanical properties of the magnesium alloy matrix, it adversely affected the tensile properties and fracture toughness of the composite. |
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