Title of article
Microstructure stability of as-extruded bimodal size SiCp/AZ91 composite
Author/Authors
Li، نويسنده , , Jian-chao and Nie، نويسنده , , Kai-bo and Deng، نويسنده , , Kun-kun and Shang، نويسنده , , Shuan-jun and Zhou، نويسنده , , Shan-shan and Xu، نويسنده , , Fang-jun and Fan، نويسنده , , Jian-feng، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2014
Pages
8
From page
489
To page
496
Abstract
The microstructure stability and micro-hardness of as-extruded bimodal size (micron+submicron) SiCp/AZ91 composites were investigated. Results show that the significant grain refinement appears around micron SiCp at the temperature range of 643–693 K. Compared with monolithic AZ91 alloy and micron SiCp/AZ91 composite, the obvious submicron particle dense zones (SPDZs) are formed in the vicinity of micron SiCp in bimodal size SiCp/AZ91 composite during thermal stability test, which results in the small average grain size and improved microstructure stability. The micro-hardness of bimodal size SiCp/AZ91 composite is higher than that of monolithic AZ91 alloy and micron SiCp/AZ91 composite. The micro-hardness of bimodal size SiCp/AZ91 composite depends strongly on grain size and the lowest micro-hardness appears at 643 K.
Keywords
SICP , Micro-hardness , Magnesium matrix composites , microstructure
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Serial Year
2014
Journal title
MATERIALS SCIENCE & ENGINEERING: A
Record number
2176884
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