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Influence of B4C on microstructural, mechanical and wear properties of Mg-based composite by two-step stir casting

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Title Influence of B4C on microstructural, mechanical and wear properties of Mg-based composite by two-step stir casting
 
Creator Singh, Sakshi
Chauhan, Nathi Ram
 
Subject Mg composites
Squeezed pressure
Tensile
Microstructure
Abrasive wear
 
Description 189-197
This paper has been focused on the porosity, hardness, tensile and abrasion wear of Mg-based B4C composites developed
by squeezed vacuum-based stir casting (SVSC) process by adding 3, 5, 7, 9 wt. % of B4C. Also, an electromagnetic stir
casting has been used to synthesize similar composition specimens in comparison to the SVSC results. Additionally,
electron microscopy has been used for analyzing the micro structural, fractographic and worn images of Mg-based B4C
composites and to validate appropriate fabrication method. A tribo-test has been carried out by two-body abrasion condition
at 20N and 30N load for as sliding distance of 100m and 5m/s of speed. The results reveal that the SVSC process produces
homogeneously distributed B4C particles in Mg-matrix as compared to the electromagnetic stirring. The mechanical
properties of Mg/B4C composites show their significant enhancement with the addition of B4C content in Mg-matrix. B4C
composites show an increment of 33-48% of hardness as compared to Mg-matrix. Mg-matrix having 9 wt. % of B4C
composite reveals the least tensile strength and fractured images show the cleavage planes, micro voids as well as micro
cracks. Although, worn images shows oxidation and ploughing mechanism with the increase in load and depth of
penetration in Mg-matrix B4C composites.
 
Date 2021-07-07T04:48:30Z
2021-07-07T04:48:30Z
2021-04
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/57652
 
Language en
 
Publisher CSIR-NIScPR, India
 
Source IJEMS Vol.28(2) [April 2021]