Gajanan, M.N.Narendranath, S.Satheesh, Kumar, S.S.2020-03-302020-03-302019IOP Conference Series: Materials Science and Engineering, 2019, Vol.591, 1, pp.-https://idr.nitk.ac.in/handle/123456789/7839AZ91 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.Book chapter