Study Of Mechanical Properties and Wear Behaviour of Aluminium 6061 Matrix Composites Reinforced with Steel Machining Chips

Keywords: Boron Carbide; Silisium Carbide; Composite; Powder Metallurgy. Abstract : In this study, effect of boron carbide (B4C), aluminium oxide (Al2O3) and silisium carbide (SiC) addition on microstructure and mechanical properties of diamond cutting segments was investigated. The effects of reinforcement particle additions on characteristic of CuSn matrix composites have been investigated. For this purpose, Al2O3, SiC and B4C addition quantity was added as 2 wt.%. Samples of segments were processed by cold pressing at 550 MPa, followed by sintering at 850°C/30min. Micro-structural aspects were observed by optical microscope. Density, hardness and wear tests were also performed. Wear behaviour and hardness values of segments changed depending on aluminium oxide, silisium carbide and boron carbide addition. The alloy CuSn– 2 wt.%. B4C presented the best results, available for use in cutting tools.

Download Full-text

Mechanical and Tribological Properties of Ti3Al Reinforced Aluminium Matrix Composites

Advanced Composites Letters ◽

10.1177/096369350401300102 ◽

2004 ◽

Vol 13 (1) ◽

pp. 096369350401300 ◽

Cited By ~ 2

Author(s):

D. Busquets-Mataix ◽

N. Martvnez ◽

M.D. Salvador ◽

V. Amigσ

Keyword(s):

Mechanical Properties ◽

Tensile Strength ◽

Powder Metallurgy ◽

Aluminium Matrix ◽

Wear Behaviour ◽

Matrix Composites ◽

High Tensile Strength ◽

Tribological Behaviour ◽

Aluminium Matrix Composites ◽

Mechanical And Tribological Properties

Mechanical properties and tribological behaviour of AA6061 and AA7015 aluminium matrix composites reinforced with Ti3Al intermetallics have been studied. Processing of the composites consisted of a combination of powder metallurgy and extrusion techniques. High tensile strength was attained on both alloys, although composites did not improve these properties. Also ductility was impaired on composites, but values above 10% were obtained in every case. Regarding friction coefficient, all composites showed a lower value with respect to base alloys, being lower as the amount of reinforcement increased. Wear behaviour of composites was improved.

Download Full-text

Stainless steel matrix composites reinforced with ceramic particles through ingot casting process

MATEC Web of Conferences ◽

10.1051/matecconf/201818801023 ◽

2018 ◽

Vol 188 ◽

pp. 01023

Author(s):

Ana Kračun ◽

Franc Tehnovnik ◽

Fevzi Kafexhiu ◽

Tadeja Kosec ◽

Darja Jenko ◽

...

Keyword(s):

Mechanical Properties ◽

Stainless Steel ◽

Metal Matrix ◽

Casting Process ◽

Nano Particles ◽

Wear Behaviour ◽

Steel Matrix ◽

Ingot Casting ◽

Matrix Composites ◽

Conventional Casting

The aim of the study was to assess the influence of adding Al2O3 nano-particles of 0.5 wt. % with the mean particle size of 500 nm on the mechanical properties and wear behaviour of the austenitic stainless steel matrix reinforced with nano-particles produced by conventional ingot casting. The focus was on the methods and possibilities of homogeneous and uniform distribution of the particles within the steel matrix using conventional casting routes. The main drawback of the casting method used is the agglomeration of the particles and poor interface between the particles and the metal matrix. The results show that through a proper insertion method, nano-particles can be successfully introduced into the metal matrix. The Al2O3 nano-particles were successfully incorporated into the steel matrix with no signs of clustering and intermetallic reactions taking place between the nano-particles and the steel matrix. This led to improved mechanical properties as well as the wear behaviour of the stainless steel, achieved by using conventional casting routes.

Download Full-text

Wear behaviour of polyurethane composites with respect to the other mechanical properties

World Journal of Engineering ◽

10.1260/1708-5284.11.2.139 ◽

2014 ◽

Vol 11 (2) ◽

pp. 139-146

Author(s):

Anna Porąbka ◽

Vasiliki-Maria Archodoulaki ◽

Wolfgang Molnar ◽

Jadwiga Laska

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Physical And Mechanical Properties ◽

The Other ◽

Wear Behaviour ◽

Matrix Composites ◽

Different Temperatures ◽

Polyurethane Composites ◽

Polyurethane Matrix ◽

Properties Of Composites

Two series of polyurethane matrix composites were prepared. As generally resistant to wear, the PUs can be used as matrices for wear protective and load-bearing composites. The objective of this study was to compare the mechanical properties of composites containing 5% vol. of selected ceramic particles, and unmodified PUs. The effect of various particles on physical and mechanical properties was studied. The results showed that the mechanical properties changed compared to reference materials: modulus improved in certain materials and in different temperatures, revealing the favourable influence of FA and SiO2 particles. In turn, Rm and wear resistance decreased with the type and shape of filler.

Download Full-text

MECHANICAL PROPERTIES AND WEAR BEHAVIOUR OF KAOLINITE CLAY PARTICLES REINFORCED EPOXY MATRIX COMPOSITES

FUTA JOURNAL OF ENGINEERING AND ENGINEERING TECHNOLOGY ◽

10.51459/futajeet.2021.15.2.317 ◽

2021 ◽

Vol 15 (2) ◽

pp. 205-217

Author(s):

O O. Daramola

Keyword(s):

Mechanical Properties ◽

Epoxy Matrix ◽

Ultrafine Particles ◽

Room Temperature ◽

Structural Characteristics ◽

Wear Behaviour ◽

Matrix Composites ◽

Sem Images ◽

Kaolinite Clay ◽

Clay Particles

Epoxy matrix composites reinforced with clay particles were developed by hand lay-up open mould casting technique. The clay used in this study was pulverized and processed into ultrafine particles through the sedimentation process. The composites were developed by blending the epoxy matrix and hardener with various weight fractions of the ultrafine clay particles (2, 4, 6, 8 and 10 wt%) in open test moulds. In order to accomplish a homogeneous blend of the constituents; manual mixing of the blend was carried out for 3 min. The test specimens were left to cure for 24 hours in the moulds and for additional 27 days at room temperature of 27 Â± 2 Â°C and were thereafter detached from the moulds. The developed composites test specimens were subjected to mechanical tests (flexural, tensile and impact) in accordance with ASTM standards and performed at room temperature. Structural characteristics of the clay particles were determined with the aid of an X-ray diffractometer (XRD). The morphologies of the composites were determined using a scanning electron microscope (SEM). There was a progressive enhancement in the mechanical properties of epoxy composites containing 2-6 wt.% ultrafine clay particles while a drastic decrease in the mechanical properties was noticed in the epoxy/clay composites reinforced with 8-10 wt.% ultrafine clay particles. The SEM images revealed homogeneous particles distributions within the epoxy matrix at lower ultrafine clay particles weight fractions (2 wt. % and 6 wt.%).

Download Full-text