Study on formability and strain hardening index: influence of particle size of boron carbide (B4C) in magnesium matrix composites fabricated by powder metallurgy technique

The dry sliding wear behavior of magnesium-matrix-composites (MMC) reinforced by boron carbide particulates (B4Cp) has been investigated. Magnesium is the lightest structural material and is a good choice as a metal matrix for boron carbide and silicon carbide addition. Magnesium and its alloys, without reinforcement, are generally not suitable for mechanical applications due to their low wear resistance. The MMCs used in this study were produced via highpressure die-casting technique. The wear resistance of B4C/AZ91D composite reinforced with 12 and 25 wt% B4C were studied, compared with unreinforced diecast AZ91D. As-cast microstructures of the materials and boron carbide particules were characterized by using Scanning Electron Microscopy (SEM). The hardness values of the control sample and the composites were determined via Vickers hardness measurements. Pin on disk dry sliding wear tests were carried out to study wear rate and wear mechanisms. The magnesium matrix composites were used as pins while mild steel as disc material. The worn surfaces of pins were examined by using SEM. The wear performance of magnesium matrix composites was improved with increasing volume fraction of B4C up to a certain level.

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The Effect of TiB2 Content on Wear and Mechanical Behavior of AZ91 Magnesium Matrix Composites Produced by Powder Metallurgy

Powder Metallurgy and Metal Ceramics ◽

10.1007/s11106-019-00016-9 ◽

2019 ◽

Vol 57 (9-10) ◽

pp. 564-572 ◽

Cited By ~ 8

Author(s):

Fatih Aydin ◽

Yavuz Sun ◽

M. Emre Turan

Keyword(s):

Powder Metallurgy ◽

Mechanical Behavior ◽

Matrix Composites ◽

Magnesium Matrix ◽

Magnesium Matrix Composites ◽

Az91 Magnesium

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Study on Mechanical Property of Sic Particulate Reinforced Magnesium Matrix Composites Prepared by Powder Metallurgy

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.246-247.1106 ◽

2012 ◽

Vol 246-247 ◽

pp. 1106-1110

Author(s):

Jian Xiu Liu ◽

Ya Jun Zhou ◽

Xiao Yang Zi

Keyword(s):

Mechanical Property ◽

Powder Metallurgy ◽

Coefficient Of Friction ◽

Matrix Composites ◽

Az91 Magnesium Alloy ◽

Magnesium Matrix ◽

Magnesium Matrix Composites ◽

Az91 Magnesium ◽

Particulate Reinforced ◽

Sic Particle

This paper has made a study on Mechanical Property of SiC particulate reinforced Magnesium Matrix Composites prepared by Powder Metallurgy.In this paper, powder metallurgy was adopted in the preparation of AZ91 magnesium alloy and magnesium-base composite material alloying two kinds of SiC particle, whose mean diameters were 18μm and 8μm respectively. The mechanical properties of the sample such as hardness, strength of extension and coefficient of friction were tested, while microstructure of material was observed in electron microscope. At last, analysis of the friction and abrasion mode and tensile break mechanism of the material were carried out. By the series of trials, the following result can be concluded: the additions of SiC particle can decrease theβ-Mg17Al12 mesh effectively while increase the degree of densifying. Comparing with AZ91, the addition of SiC particle of diameter 18μm and 8μm increase the material hardness by 6.85% and 26.92%, strength of extension 29.14% and 71.38% and coefficient of friction 2.33% and 9.62%, respectively. Magnesium matrix composites that prepared by powder metallurgy can be used for the production of friction materials.

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