Effect of Carbon Nanotube on High-Temperature Formability of AZ31 Magnesium Alloy |
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| Authors: | S Fida Hassan M Paramsothy Z M Gasem F Patel M Gupta |
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| Affiliation: | 1. Department of Mechanical Engineering, King Fahd University of Petroleum & Minerals, P.O. Box 1061, Dhahran, 31261, Kingdom of Saudi Arabia
2. Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore, 117576, Singapore
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| Abstract: | Room-temperature tensile properties of AZ31 alloy have significantly been improved when reinforced with carbon nanotube via ingot metallurgy process. However, high-temperature (up to 250 °C) elongation-to-failure tensile test of the developed nanocomposite revealed a considerable softening in the AZ31 alloy matrix accompanied by an incredible ductility increment (up to 132%). Microstructural characterization of the fractured samples revealed that the dynamic recrystallization process has induced a complete recrystallization in the AZ31 alloy at a lower temperature (150 °C) followed by substantial grain growth at a higher temperature used in this study. Fractography on the fractured surfaces revealed that the room-temperature mixed brittle-ductile modes of fracture behavior of AZ31 alloy have transformed into a complete ductile mode of fracture at high temperature. |
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