MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
Development of Fine-Grained Structure Caused by Friction Stir Welding Process of a ZK60A Magnesium Alloy
Sergey MironovYoshinobu MotohashiRustam KaibyshevHidetoshi SomekawaToshiji MukaiKaneaki Tsuzaki
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2009 Volume 50 Issue 3 Pages 610-617

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Abstract

A fine-grained microstructure average grain size of which is around 2 μm was developed in ZK60A magnesium alloy subjected to a FSW process. Material flow arose mainly from basal slips and was governed by simple shear deformations caused by the tool rotation.
The development of the fine-grained structure was a complex process driven by severe plastic deformations, formation of deformation bands, grain splitting, twinning and dynamic and/or static recrystallizations. It appears also that the microstructural evolution depended on morphology of fine dispersoids.

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© 2009 The Japan Institute of Metals and Materials
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