Microstructural origin of friction stir processed zone in a magnesium alloy

Abhishek Tripathi, Asim Tewari, N Srinivasan, G Madhusudhan Reddy, Su-Ming Zhu, Jian Feng Nie, Roger D Doherty, Indradev Samajdar

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Abstract

This study involved edge regions of a friction stir processed (FSP) magnesium alloy (AZ31). Interleaved structures of ultra-fine, of few 100 nm, and coarser grains, several microns, were noted. Very short thermal anneals coarsened the former: generating typical micron-sized FSP grains. A model of microstructural development through grain boundary sliding of the ultra-fine grains was proposed. This model explains weaker texture in such grains and the fact that Mg-FSP shear texture did not change by successive passes.
Original languageEnglish
Pages (from-to)3333-3336
Number of pages4
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume46A
Issue number8
DOIs
Publication statusPublished - Aug 2015

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