Microstructural characterization and evaluation of mechanical properties of silicon nitride reinforced LM 25 composite

被引:16
作者
Ahmad, Zeeshan [1 ]
Khan, Sabah [1 ]
Hasan, Shabahat [1 ]
机构
[1] Jamia Millia Islamia, Dept Mech Engn, New Delhi, India
来源
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2020年 / 9卷 / 04期
关键词
LM; 25; Silicon nitride; SEM; Stir casting; Fracture;
D O I
10.1016/j.jmrt.2020.06.037
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This study focuses on the effect of the reinforcement of Si3N4 particles on the microstruc-ture, and mechanical properties of LM25 Al alloy matrix composites fabricated by the stir casting process. The reinforcement content was varied from 4% to 12% in steps of 4%, for a set of three composites. The microstructures and morphology of the developed composites were studied by SEM and EDS. The amount of different elements present in the reinforce-ment, matrix and the three sets of composites is demonstrated using elemental mapping. The result of this investigation revealed that a uniform distribution of Si3N4 particles takes place at all weight percentages of reinforcement in LM 25 alloy, with limited non-uniformity due to clustering of ceramic particles. The mechanical properties were also evaluated and analysed for the fabricated AMCs. A fracture surface mapping was also carried out for the composites.(c) 2020 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
引用
收藏
页码:9129 / 9135
页数:7
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