Please use this identifier to cite or link to this item:
https://doi.org/10.1016/j.msea.2012.08.002
Title: | High temperature tensile response of nano-Al 2O 3 reinforced AZ31 nanocomposites |
Authors: | Hassan, S.F. Paramsothy, M. Patel, F. Gupta, M. |
Keywords: | AZ31 Ductility High-temperature strength Nano-Al 2O 3 Nanocomposite |
Issue Date: | 15-Dec-2012 |
Source: | Hassan, S.F., Paramsothy, M., Patel, F., Gupta, M. (2012-12-15). High temperature tensile response of nano-Al 2O 3 reinforced AZ31 nanocomposites. Materials Science and Engineering A 558 : 278-284. ScholarBank@NUS Repository. https://doi.org/10.1016/j.msea.2012.08.002 |
Abstract: | Nano-Al 2O 3 reinforcement's capability to simultaneously enhance the room temperature (25°C) strength and ductility of magnesium alloys has effectively been exploited in ingot metallurgy processed AZ31/1.5Al 2O 3 nanocomposite in this study. Tensile characterization revealed that at high temperature (150-250°C), instead of strengthening, the thermally stable nano-Al 2O 3 reinforcement ironically exacerbated the softening of AZ31 alloy. However, an incredible increment in AZ31 alloy (with grain size of ~2.3μm) ductility (up to 184%) has been achieved in the nanocomposite with increasing temperature due to the incorporation of nano-Al 2O 3 as reinforcement. Microstructural characterization of the nanocomposite revealed that the dynamic recrystallization process has induced a complete recrystallization in AZ31 alloy matrix at a relatively much lower temperature (150°C) with tremendous grain growth near the fracture surface at higher temperature (250°C). Fractography of the nanocomposite revealed that the room temperature mixed ductile mode fracture behavior of AZ31 alloy transformed to a complete ductile mode at high temperature due to the presence of nano-Al 2O 3 particulates. © 2012 Elsevier B.V. |
Source Title: | Materials Science and Engineering A |
URI: | http://scholarbank.nus.edu.sg/handle/10635/85268 |
ISSN: | 09215093 |
DOI: | 10.1016/j.msea.2012.08.002 |
Appears in Collections: | Staff Publications |
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