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Research Article

A research on effect of process parameters on mechanical
properties of B4C reinforced aluminum matrix composites
fabricated by mechanical milling and hot press sintering route

Mutlu Karasoglu1, Serdar Karaoglu2, Taylan Sinan2, Tugce Tekin2

1Department of Mechanical Engineering, Eskisehir Technical University, Eskisehir, Turkey
2Department of Mechanical Engineering, Ege University, Izmir, Turkey

Keywords

Abstract


Powder metallurgy;


Metal matrix
composites;


Mechanical milling;


Mechanical
characterization.

.

.

The aim of this study is to investigate the effect of mechanical milling and hot
pressing process parameters on the density and strength of Al-10%B4Cp composites. For this research, powder mixtures consisting of Al matrix and B4C reinforcement particles were prepared by mechanical milling. Powder mixtures were milled for different times (5, 10, 15 and 20 hours) in a high energy planetary ball mill. In the milling vials, 10wt% B4C particle reinforcements were added to aluminum matrix powders. Average particle size of B4C and Al powders were 77μm and 63μm respectively. Powder mixtures were compacted as cylindrical samples by uniaxial hot pressing at 30 MPa. Specimens were hot pressed in nitrogen atmosphere at temperatures of 500-550-600 °C for 15-30- 45 minutes. Effects of milling and hot pressing variables on microstructure and mechanical properties were investigated by means of density and hardness measurements and compression tests. Microstructures of powders and compacts were investigated by microscopy techniques. Density measurements showed that compressibility of powders decreased with increasing milling times. Density, hardness and compressive yield strength values were increased with increasing hot pressing temperature and durations.

© 2019 MIM Research Group. All rights reserved.

LATEST News


25/12/2019 Most Cited Paper Award: The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the 2019 Most Cited Paper Award of Research on Engineering Structures and Materials (RESM).

25/12/2019 Best Paper Award: The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 2019 Best Paper Award of Research on Engineering Structures and Materials (RESM).


13/11/2019 Data articles as a new type of submision: Editorial Board of our journal have decided to accept a new type of submission: data articles. The focus of these papers is only on data and how it is collected but not on its interpretation and drawn conclusions. For more see News section.


24/5/2019 Collaboration for THERMAM 2019: Editorial Board of our journal and Organizing Committee of 6th International Conference of Thermophysical and Mechanical Properties of Advanced Materials, 8th Rostocker International Conference of Thermophysical Properties for Technical Thermodynamics have agreed to collaborate. Extended versions of the selected papers from the conference will be published in our journal. For more see Events.


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LATEST AWARDS


2019 Most Cited Paper Award:

The paper authored by Manoj Sahni and Sanjeev Sharma entitled as “Elastic-plastic deformation of a thin rotating solid disk of exponentially varying density" is awarded the


2019 Best Paper Award:

The paper authored by Marcelo Mesquita do Amaral, Matheus Wanglon Ferreira and Mauro de Vasconcellos Real entitled as “A simplified method for analysis of reinforced concrete beams exposed to fire situation” is awarded the 


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Last Update:

29.12.2019

(dd.mm.yyyy)