Large plasticity of a Mg42Li23Cu25Y10 multiphase composite

Sergio Gonzalez Sanchez, Dimitri Louzguine-Luzgin, John Perepezko, Akihisa Inoue

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

A novel Mg42Li23Cu25Y10 nanostructure-bcc ductile phase composite containing a Mg2Cu phase and amorphous zones has been obtained by injection casting. This alloy exhibits a large plastic engineering strain of 83% and plastic true strain of 177% with a flow stress at 4.3% deformation of 425 MPa. During compression, the deformation of the nanometer size bcc particles occurs by grain boundary sliding accommodated by flow controlled by grain boundary diffusion at room temperature. The hierarchical multiphase microstructure design allows for the operation and interaction of different shear deformation bands to provide large plastic strain at high strength.
Original languageEnglish
Pages (from-to)5576-5584
JournalMaterials Science and Engineering: A
Volume528
Issue number16-17
DOIs
Publication statusPublished - 25 Jun 2011

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