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Precipitation behavior of an ultra-fine grained Mg-Zn alloy processed by high-pressure torsion

TitlePrecipitation behavior of an ultra-fine grained Mg-Zn alloy processed by high-pressure torsion
Publication TypeJournal Article
Year of Publication2015
AuthorsMeng, FQ, Rosalie, JM, Singh, A, Tsuchiya, K
JournalMaterials Science and Engineering a-Structural Materials Properties Microstructure and Processing
Volume644
Pagination386-391
Date Published09
Type of ArticleArticle
ISBN Number0921-5093
Accession NumberWOS:000361258200044
KeywordsAgeing, alloy, diffusion, High pressure torsion, magnesium alloy, mechanical-properties, Mg alloy, precipitation, severe plastic-deformation, superplasticity, treatment, Ultra-fine grained structure, y
Abstract

Precipitation behavior in severely plastically deformed Mg-3.4 at%Zn was studied by ageing treatment at 348 and 423 K. Microstructural observations reveal two kinds of precipitates: one from the dynamic precipitation during high-pressure torsion processing and the other from the ageing treatment. Precipitates formed from annealing treatment are observed inside of grains after 4 h of annealing at 423 K, while they were not observed at 348 K. Effect of precipitation hardening is balanced by the grain growth and formatidn of precipitates free zones at ageing temperature of 423 K, resulting in the absence of age-hardening effect in ultra-fine grained MgZn prepared by severe plastic deformation. Published by Elsevier B.V.

DOI10.1016/j.msea.2015.07.086
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