Refinement of the icosahedral quasicrystalline phase and the grain size of Mg-9.25Zn-1.66Y alloy by high-ratio differential speed rolling

Kwak, T. Y.; Lim, H. K.; Han, S. H.; Kim, W. J.

doi:10.1016/j.scriptamat.2015.03.004

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Refinement of the icosahedral quasicrystalline phase and the grain size of Mg-9.25Zn-1.66Y alloy by high-ratio differential speed rolling

Kwak, T. Y.;
Lim, H. K.;
Han, S. H.;
Kim, W. J.

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32

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32

초록

Differential speed rolling was applied to a Mg-9.25Zn-1.66Y alloy with an icosahedral quasicrystalline (I) phase to refine its cast microstructure by severe plastic deformation. The grain size was reduced to gm. A higher speed ratio, which produces a higher shear strain, was more effective in breaking up the eutectic I phase structure and dispersing the broken particles into the matrix. The processed alloy exhibited a high yield stress of 337 MPa and a good elongation of 10.7%. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

키워드

Severe plastic deformation (SPD); Particle stimulated nucleation (PSN); Electron backscattering diffraction (EBSD); Magnesium alloys; ZN-Y ALLOYS; MECHANICAL-PROPERTIES; MG; MICROSTRUCTURE; SHEETS; STRENGTH

제목: Refinement of the icosahedral quasicrystalline phase and the grain size of Mg-9.25Zn-1.66Y alloy by high-ratio differential speed rolling

저자: Kwak, T. Y.; Lim, H. K.; Han, S. H.; Kim, W. J.

DOI: 10.1016/j.scriptamat.2015.03.004

발행일: 2015-07-01

유형: Article

저널명: Scripta Materialia

권: 103

페이지: 49 ~ 52