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Title: Microstructural evolution in an ultra-fine YAl{sub 2p} reinforced Mg–14Li–3Al composite during warm-rolling

The YAl{sub 2p}/MgLiAl composite prepared by stir casting was initially forged and then rolled at 200 °C to different thicknesses. The microstructural evolution in the composite during warm rolling was investigated by using transmission electron microscope (TEM). It is found that increasing rolling reduction is conducive to the uniform distribution and refinement of the YAl{sub 2} particles. The rolling deformation promoted the precipitation of an α phase, and the α precipitate is semi-coherent to the matrix with an orientation relationship to the β matrix as: (0002){sub α}‖(110){sub β}. In addition, many nano-sized YAl particles with a cubic shape were found in the matrix of the composite with a high rolling reduction due to the diffusion of Y from YAl{sub 2} to the matrix, which reacted with the Al in the matrix during warm rolling. - Highlights: • The reinforcement YAl{sub 2} particles were distributed more uniformly in the matrix and refined with increasing rolling reduction. • The rolling deformation promoted and refined the precipitation of an α phase with increasing rolling reduction. • Many nano-sized YAl phases were produced and distributed in the matrix of the composite at a high rolling reduction.
Authors:
 [1] ;  [2] ;  [1] ;  [1] ; ; ;  [1]
  1. School of Materials Science and Engineering, Key laboratory of Low Dimensional Materials & Application Technology (Ministry of Education), Xiangtan University, Xiangtan 411105, Hunan (China)
  2. School of Materials Science and Engineering, Beihang University, 37 Xueyuan Road, Haidian District, Beijing 100191 (China)
Publication Date:
OSTI Identifier:
22476099
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Characterization; Journal Volume: 104; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALUMINIUM COMPOUNDS; COMPOSITE MATERIALS; DEFORMATION; DIFFUSION; DISTRIBUTION; LITHIUM COMPOUNDS; MAGNESIUM; MAGNESIUM COMPOUNDS; MICROSTRUCTURE; NANOSTRUCTURES; PRECIPITATION; REDUCTION; ROLLING; TRANSMISSION ELECTRON MICROSCOPY