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Title: | Effect of grain refinement on mechanical and corrosion behavior of AZ91 magnesium alloy processed by ECAE |
Authors: | Gajanan, M.N. Narendranath, S. Satheesh, Kumar, S.S. |
Issue Date: | 2019 |
Citation: | IOP Conference Series: Materials Science and Engineering, 2019, Vol.591, 1, pp.- |
Abstract: | AZ91 Mg alloys were processed by equal channel angular extrusion (ECAE) up to 4 passes through route-R. The increase in number of ECAE passes to yield fine-grain structure in the bulk Mg alloy with a more dislocation density, this enhances mechanical properties and corrosion resistance. Indeed, microstructural observations revealed an equiaxed and significant grain refinement after ECAE-4P, with a mean grain size (d) of ? 4.36?m. Further, the tensile strength, micro-hardness and corrosion resistance were also increased, however the elongation was reduced with the increasing of ECAE passes. The electrochemical polarization test in 3.5wt % NaCl solution revealed a noticeable enhancement in the corrosion resistance of ECAE processed AZ91 Mg alloy compared with the as-received Mg alloy. This is mainly due to grain refinement and distribution of secondary phase particles in Mg alloy matrix during ECAE-4P. � 2019 Published under licence by IOP Publishing Ltd. |
URI: | http://idr.nitk.ac.in/jspui/handle/123456789/7839 |
Appears in Collections: | 2. Conference Papers |
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