Mechanical and microstructural evolution of Mg AZ31 alloy using ECASD process

Daniel Peláez, Cesar Isaza, Juan M. Meza, Patricia Fernández-Morales, Wociech Z. Misiolek, Emigdio Mendoza

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    12 Scopus citations


    A continuous severe plastic deformation (SPD) technique called equal-channel angular sheet drawing (ECASD) was used to mechanically deform an annealed magnesium AZ31B alloy. Samples of 2.45 mm thickness by 50 mm width and 200 mm in length were cut from a sheet and then submitted to two different ECASD routes: route A: the sample is not rotated around its axis and, route C: the sample is rotated 180°around its axis between passes. The samples were held up to six ECASD passes at room temperature (RT). The processing speed was set at 20 mm/min for both routes. The mechanical properties and the micro-structural evolution were studied as a function of the number of passes, and processing route; tensile and hardness tests were used for this purpose. A grain size refinement is achieved from the first pass for both routes, being the grain refinement more marked for route A; at the last passes is evident the presence of twins. Hardness had shown a remarkable increase in each pass. It was found that the route C produces better uniform hardness distribution through the thickness of the samples when is compared with route A. Nevertheless, ultimate tensile strength (UTS) and yield strength (YS) are inconsistent with the Hall-Petch relationship. It could be due to a higher rate of texture softening verses the strengthening effects of the grain refinement.

    Original languageEnglish
    Pages (from-to)392-397
    Number of pages6
    JournalJournal of Materials Research and Technology
    Issue number4
    StatePublished - 2015

    Bibliographical note

    Funding Information:
    The authors thank Universidad Pontificia Bolivariana, Universidad Nacional de Colombia-Sede Medellin and Institute for Metal Forming-Lehigh University for their all-round help in the entire work. This work has been financially supported by Colciencias with project code 1210-569-34713.

    Publisher Copyright:
    © 2015 Brazilian Metallurgical, Materials and Mining Association.


    • ECASD
    • Magnesium alloy
    • Mechanical properties
    • Microstructure


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