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Metallurgical and Materials Transactions A
Published in: Metallurgical and Materials Transactions A 8/2014

01-07-2014 | Symposium: Processing-Microstructure-PropertyRelationships & Deformation Mechanisms of Magnesium Alloys

Development of Very High Strength and Ductile Dilute Magnesium Alloys by Dispersion of Quasicrystal Phase

Authors: Alok Singh, Yoshiaki Osawa, Hidetoshi Somekawa, Toshiji Mukai, Catherine J. Parrish, Donald S. Shih

Published in: Metallurgical and Materials Transactions A | Issue 8/2014

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Abstract

Very high strengths, with tensile yield strength from 377 to 405 MPa, combined with elongation to failure of over 12 pct, have been achieved in Mg-Zn-Y dilute alloys by direct extrusion. Alloys Mg-6xZn-xY, where x = 0.2, 0.35, and 0.5 (at. pct) were chill cast in a steel mold and direct extruded at a temperature in the range 508 K to 528 K (235 °C to 255 °C), which produced an average grain size of about 1 μm. Quasicrystalline i-phase particles were dispersed in the matrix with size ranging from 50 nm to 1 μm. In addition, high density of nano-precipitates of average size 15 nm was dispersed in matrix. Thus we have developed magnesium alloys of very high strength combined with ductility by a simple process using extrusion with very little addition of yttrium.
previous article Microstructure and Mechanical Behavior of Powder Metallurgy Mg98.5Gd1Zn0.5 Alloy
next article Comparison Study of Microstructure and Phase Evolution in Mg-Nd- and Mg-Gd-Based Alloys

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Metadata
Title
Development of Very High Strength and Ductile Dilute Magnesium Alloys by Dispersion of Quasicrystal Phase
Authors
Alok Singh
Yoshiaki Osawa
Hidetoshi Somekawa
Toshiji Mukai
Catherine J. Parrish
Donald S. Shih
Publication date
01-07-2014
Publisher
Springer US
Published in
Metallurgical and Materials Transactions A / Issue 8/2014
Print ISSN: 1073-5623
Electronic ISSN: 1543-1940
DOI
https://doi.org/10.1007/s11661-013-2056-5

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