Development of High Strength Alloys in the Mg-Ni-Y-RE System

Pérez, Pablo, Gonzalez Sanchez, Sergio, Garcés, Gerardo, Caruana, G. and Adeva, Paloma (2008) Development of High Strength Alloys in the Mg-Ni-Y-RE System. Materials Science Forum, 567-56. pp. 385-388. ISSN 1662-9752

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Official URL: http://dx.doi.org/10.4028/www.scientific.net/MSF.5...

Abstract

The microstructural and mechanical characterization of two alloys within the Mg-Ni-YRE system prepared by casting and subsequent hot extrusion at 400°C have been carried out. The microstructure of both materials consists of a fine-grained magnesium matrix embedding a high volume fraction of second phases; coarse Mg12RE and long period ordered stacking structure (LPS phase) and fine Mg2Ni particles. Both alloys show high strength values up to 250°C. The yield stress values at room temperature are 295 and 405 MPa for low- and high-alloyed magnesium alloy, respectively. Load transfer from the magnesium matrix to coarse Mg12RE and LPS particles account for the high strength of both alloys at temperatures below 250°C. Above this temperature both alloys exhibit a superplastic behaviour at low stresses with elongations of 700 and 450 % for the low and high-alloyed magnesium alloy, respectively.

Item Type: Article
Uncontrolled Keywords: Magnesium Alloy, Mechanical Property, Microstructure
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Becky Skoyles
Date Deposited: 10 Nov 2015 15:48
Last Modified: 10 Mar 2016 12:03
URI: http://nrl.northumbria.ac.uk/id/eprint/24395

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