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      Achieving ultra-fine grains in AZ61 Mg alloy by friction stir processing

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          Abstract

          In order to obtain fine-microstructure magnesium alloys with superior mechanical properties, AZ61 alloy is processed by friction stir processing combined with rapid heat sinking in this study. Ultrafine-grain microstructure with average size less than 300 nm was observed in the resultant AZ61 alloy. The mean microhardness of the ultrafine-grain region reached 120 ∼ 130 HV, twice that of the AZ61 substrate. All these results demonstrate clearly that under a cooling rate high enough, ultrafine-grain structure in AZ 61 alloy with superior mechanical properties can be produced by one pass friction stir processing via dynamic re-crystallization.

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          Author and article information

          Journal
          ijmr
          International Journal of Materials Research
          Carl Hanser Verlag
          1862-5282
          2195-8556
          2008
          : 99
          : 12
          : 1375-1378
          Affiliations
          a Department of Materials Engineering, Shenyang Institute of Aeronautical Engineering, Shenyang, P.R. China
          b Institute of Metal Research, Chinese Academy of Sciences, Shenyang, P.R. China
          Author notes
          [] Correspondence address, Dr. Du Xinghao, Department of Materials Engineering, Shenyang Institute of Aeronautical Engineering, Shenyang, 110034, PRC, Tel.: +862486 141696. E-mail: xhdu@ 123456alumni.nsysu.edu.tw
          Article
          MK101776
          10.3139/146.101776
          © 2008, Carl Hanser Verlag, München
          Page count
          References: 26, Pages: 4
          Product
          Categories
          Basic

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