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Powder Metallurgy Volume 59, 2016 - Issue 4
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Original Articles

Effect of nano-SiC content on mechanical properties of SiC/2014Al composites fabricated by powder metallurgy combined with hot extrusion

Z.-G. WangKey Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun130025, P.R. China;Center of Analytical and Testing, Beihua University, No. 3999 Binjiang East Road, Jilin132013, P.R. China
,
C.-P. LiKey Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun130025, P.R. China;Center of Analytical and Testing, Beihua University, No. 3999 Binjiang East Road, Jilin132013, P.R. China
,
H.-Y. WangKey Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun130025, P.R. ChinaCorrespondence[email protected]
,
X. ZhuKey Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun130025, P.R. China
,
M. WuKey Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun130025, P.R. China
&
Q.-C. JiangKey Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, No. 5988 Renmin Street, Changchun130025, P.R. China
Pages 236-241 | Received 10 Sep 2015, Accepted 26 Jan 2016, Published online: 17 Mar 2016
 
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Abstract

Nano-SiC particulates (n-SiCp) reinforced 2014Al matrix composites with different reinforcement volume fractions (0, 0.25, 0.5 and 1 vol.-%) were fabricated by powder metallurgy combined with hot extrusion. The effect of volume fraction of n-SiCp on mechanical properties of composites was studied at both ambient and elevated temperatures. The increase of n-SiCp content led to an increase in yield strength (YS) and ultimate tensile strength (UTS) and a slight decrease in elongation which is much better than the composites reinforced with micro-SiCp. The 0.5 vol.-% n-SiCp/2014Al composite observed the highest YS and UTS of ∼378 and ∼573 MPa at room temperature and of ∼303 and ∼409 MPa at 473 K. The enhancement of the properties is suggested to be induced by uniformly dispersed and well-bonded n-SiCp reinforcements as well as the age-hardening effect of the more and finer precipitates.

Acknowledgements

Financial supports from the National Basic Research Program of China (973 Program, No. 2012CB619600), the Natural Science Foundation of China (No. 51474111) and Doctoral Fund of Ministry of Education of China (20120061110031) are greatly acknowledged. Partial financial supports come from the Fundamental Research Funds for the Central Universities (JCKY-QKJC02) and the Foundation of Jilin University for Distinguished Young Scholars.

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