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Microstructure and Tensile Properties of ECAPed Mg-9Al-1Si-1SiC Composites: The Influence of Initial Microstructures.

Authors :
Zhang, Shaoxiong
Li, Ming
Wang, Hongxia
Cheng, Weili
Lei, Weiwei
Liu, Yiming
Liang, Wei
Source :
Materials (1996-1944); Jan2018, Vol. 11 Issue 1, p136, 11p, 1 Color Photograph, 3 Black and White Photographs, 1 Diagram, 3 Graphs
Publication Year :
2018

Abstract

Mg-9Al-1Si-1SiC composites with various initial microstructures prior to equal channel angular pressing (ECAP) were obtained by different pre-treatments (without and with homogenization treatment), and the resultant grain size, second phase and tensile properties of ECAPed composites were reported. The ECAPed composite with homogenization treatment (HT) exhibited finer grain size, higher fraction of dynamically recrystallized (DRXed) grains, weaker texture intensity, as well as the presence of dynamic precipitated Mg<subscript>17</subscript>Al<subscript>12</subscript> phase compared to that without HT. Besides, the morphology of pre-existing Mg<subscript>2</subscript>Si changed from massive-like to needle-like in the ECAPed composite with HT. Room-temperature tensile test results showed that ultimate tensile strength (UTS), yield strength (YS), and elongation (El) of ECAPed composites with HT were 16.1%, 23%, and 27.3% larger than that without HT, respectively. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19961944
Volume :
11
Issue :
1
Database :
Complementary Index
Journal :
Materials (1996-1944)
Publication Type :
Academic Journal
Accession number :
127668857
Full Text :
https://doi.org/10.3390/ma11010136