scholarly journals B4C Particles Reinforced Al2024 Composites via Mechanical Milling

Metals ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 647 ◽  
Author(s):  
Caleb Carreño-Gallardo ◽  
Ivanovich Estrada-Guel ◽  
Claudia López-Meléndez ◽  
Ernesto Ledezma-Sillas ◽  
Rubén Castañeda-Balderas ◽  
...  
Keyword(s):  
Crystallite Size ◽  
Mechanical Milling ◽  
Aluminum Matrix ◽  
High Energy ◽  
Milling Process ◽  
Homogeneous Distribution ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
2024 Alloy ◽  
B4c Particles

The control of a homogeneous distribution of the reinforcing phase in aluminum matrix composites is the main issue during the synthesis of this kind of material. In this work, 2024 aluminum matrix composites reinforced with boron carbide were produced by mechanical milling, using 1 and 2 h of milling. After milling, powdered samples were cold consolidated, sintered and T6 heat treated. The morphology and microstructure of Al2024/B4C composites were investigated by scanning electron microscopy; analysis of X-ray diffraction peaks were used for the calculation of the crystallite size and microstrains by the Williamson–Hall method. The mechanical properties were evaluated by compression and hardness tests. B4C particles were found to be well dispersed into the aluminum matrix as a result of the high-energy milling process. The crystallite size of composites milled for 2 h was lower than those milled for 1 h. The hardness, yield strength and maximum strength were significantly improved in the composites processed for 2 h, in comparison to those processed for 1 h and the monolithic 2024 alloy.

Dispersion of CNTs in Aluminum 2024 Alloy by Milling Process

2011 ◽  
Vol 691 ◽  
pp. 27-31 ◽  
Author(s):  
R. Pérez-Bustamante ◽  
F. Pérez-Bustamante ◽  
J. I. Barajas-Villaruel ◽  
J. Martin Herrera-Ramírez ◽  
Ivanovich Estrada-Guel ◽  
...  
Keyword(s):  
Milling Time ◽  
Vickers Microhardness ◽  
Aluminum Matrix ◽  
High Energy ◽  
Milling Process ◽  
Matrix Composites ◽  
Strengthening Mechanisms ◽  
Important Improvement ◽  
2024 Alloy ◽  
Reference Samples

Elemental powders and carbon nanotubes (CNTs) were mixed and milled in a high energy shaker mill (SPEX-8000M), to produce 2024 aluminum (Al2024) matrix composites reinforced with CNTs. Milled products were consolidated by uniaxial load pressing followed by pressure-less sintering under argon atmosphere for 2 h at 773 K. The effect of CNTs concentration and milling time on Vickers microhardness (µHV) was studied. Scanning electron microscopy (SEM) micrographs show that by milling process it is possible to obtain a homogeneous dispersion of CNTs into the aluminum matrix. The mechanical properties of the composites show an important improvement with respect to reference samples. The possible strengthening mechanisms are discussed in the present work.

Carbon Nanotubes Reinforced Aluminum Matrix Composites by High-Energy Ball Milling

2010 ◽  
Vol 150-151 ◽  
pp. 1163-1166 ◽  
Author(s):  
Xiao Fei Wang ◽  
Xiao Lan Cai
Keyword(s):  
Mechanical Properties ◽  
Ball Milling ◽  
Milling Time ◽  
Aluminum Matrix ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Energy Ball ◽  
Rotary Speed

CNT-reinforced aluminum matrix composites was produced by high-energy ball milling, the effect of rotary speed and milling time on the particle size distribution,the density and hardness of CNT-aluminum matrix composites were studied,it was observed that the rotary speed and milling time have an important effect on the mechanical properties of the CNT-aluminum matrix composites.

Multiwall Carbon Nanotube Reinforced Aluminum Matrix Composites Prepared by Ball Milling

2013 ◽  
Vol 372 ◽  
pp. 119-122 ◽  
Author(s):  
Jung Ho Ahn ◽  
Yong Jin Kim ◽  
Sang Sun Yang
Keyword(s):  
Ball Milling ◽  
Aluminum Matrix ◽  
Homogeneous Distribution ◽  
Aluminum Matrix Composites ◽  
Multiwall Carbon Nanotube ◽  
Matrix Composites ◽  
Wet Milling ◽  
Energy Ball ◽  
Dry And Wet Conditions ◽  
Multiwall Carbon

In the present work, we employed low-energy ball milling in dry and wet conditions to synthesize Al-MWCNT composites with homogeneous distribution of reinforcing phases. Dry ball milling easily resulted in the collapse of MWCNTs as well as a cold welding of constituent particles. Wet milling, on the other hand, induced a homogeneous distribution of MWCNTs and matrix phase. However, the oxidation of aluminum which results in a poor sinterability, was a major problem in wet milling. The optimum content of MWCNT in the composites was 0.5 and 1 wt% for dry and wet milling, respectively.

scholarly journals Selective Laser Melting of Al-Based Matrix Composites with Al2O3 Reinforcement: Features and Advantages

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2648
Author(s):  
Ivan A. Pelevin ◽  
Anton Yu. Nalivaiko ◽  
Dmitriy Yu. Ozherelkov ◽  
Alexander S. Shinkaryov ◽  
Stanislav V. Chernyshikhin ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
High Performance ◽  
Aluminum Matrix ◽  
Modern Method ◽  
Homogeneous Distribution ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Powder Preparation ◽  
Laser Melting ◽  
Conventional Methods

Aluminum matrix composites (AMC) are of great interest and importance as high-performance materials with enhanced mechanical properties. Al2O3 is a commonly used reinforcement in AMCs fabricated by means of various technological methods, including casting and sintering. Selective laser melting (SLM) is a suitable modern method of the fabrication of net-shape fully dense parts from AMC with alumina. The main results, achievements, and difficulties of SLM applied to AMCs with alumina are discussed in this review and compared with conventional methods. It was shown that the initial powder preparation, namely the particle size distribution, sphericity, and thorough mixing, affected the final microstructure and properties of SLMed materials drastically. The distribution of reinforcing particles tends to consolidate the near-melting pool-edges process because of pushing by the liquid–solid interface during the solidification process that is a common problem of various fabrication methods. The achievement of an homogeneous distribution was shown to be possible through both the thorough mixing of the initial powders and the precise optimization of SLM parameters. The strength of the AMCs fabricated by the SLM method was relatively low compared with materials produced by conventional methods, while for superior relative densities of more than 99%, hardness and tribological properties were obtained, making SLM a promising method for the Al-based matrix composites with Al2O3.

scholarly journals COMPARISON OF MECHANICAL AND MICROSTRUCTURAL EXAMINATION OF AL7075 COMPOSITES REINFORCED WITH MICRO AND NANO B4C

2020 ◽  
Author(s):  
Krishna Mohan Singh ◽  
A. K. Chauhan
Keyword(s):  
Mechanical Properties ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Casting Method ◽  
Lightweight Materials ◽  
Fine Microstructure ◽  
B4c Particles ◽  
Microstructural Examination

Due to the demand for lightweight materials in the field of automobiles, aeronautics and some other application, there is a need to develop lightweight materials. For the last few decades, aluminum matrix composites are being developed in order to meet out the demand of the above-mentioned industries. aluminum the above, lightweight material in the form of composites of B4C reinforced in Al7075 alloy is considered for the present investigation. The composite was produced using the stir casting method. In this investigation, the micro and nano B4C particles were used as reinforcements. The fabricated composites were characterized for microstructure and mechanical properties. From the microstructural examination, it was observed that 12% of B4C nanocomposites was having fine microstructure as compared to others. The hardness and strength were found to be maximum for 12 % B4C nanocomposites which impact strength was lowest for 12% micro composites.

Reinforcing effects of carbon nanotubes in structural aluminum matrix nanocomposites

2009 ◽  
Vol 24 (8) ◽  
pp. 2610-2616 ◽  
Author(s):  
Hyunjoo Choi ◽  
Jaehyuck Shin ◽  
Byungho Min ◽  
Junsik Park ◽  
Donghyun Bae
Keyword(s):  
Carbon Nanotubes ◽  
Aluminum Matrix ◽  
Milling Process ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Aluminum Powders ◽  
Reinforcing Effects ◽  
Thermomechanical Processes ◽  
Matrix Nanocomposites ◽  
Multiwalled Cnts

The reinforcing effects of carbon nanotubes (CNTs) are investigated for aluminum matrix composites. The composites present a strong bonding between CNTs and the aluminum matrix using a controlled mechanical milling process, producing a network structure of aluminum atoms around CNTs. At the same time, CNTs that are dispersed during the milling process can be located inside aluminum powders, thereby providing an easy consolidation route via thermomechanical processes. A composite containing 4.5 vol% multiwalled CNTs exhibits a yield strength of 620 MPa and fracture toughness of 61 MPa·mm1/2, the values of which are nearly 15 and seven times higher than those of the corresponding starting aluminum, respectively.

scholarly journals ENHANCED MICROSTRUCTURE AND MECHANICAL PROPERTIES OF SiC PARTICLE REINFORCED ALUMINIUM ALLOY COMPOSITE MATERIALS

2019 ◽  
Vol 25 (4) ◽  
pp. 253 ◽  
Author(s):  
Manoj Kumar Pal ◽  
Arnav Vikram ◽  
Vineet Bajaj
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Tensile Strength ◽  
Aluminum Matrix ◽  
Hardness Test ◽  
Stir Casting ◽  
Homogeneous Distribution ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Sic Particles

<p class="AMSmaintext">Aluminium6061 alloy composites containing various volume fractions of Silicon Carbide (SiC) particles (0, 5%, 10%, 15%, 20% and 25%) were prepared by stir casting method. In the current study,<strong> </strong>microstructures and mechanical properties of cast silicon carbide (SiC) reinforced aluminum matrix composites (AMCs) were investigated. Optical microscopic examination, SEM, tensile strength test, hardness test and elongation test were carried out. The results showed that with the addition of SiC reinforcements in Aluminum6061 matrix increased hardness and tensile strength however, decreased elongation at 25% SiC reinforced AMC. Hardness and tensile strength were observed to be are maximum at 25% SiC and elongation is minimum at 25% SiC. Microstructural observation confirmed clustering and homogeneous distribution of SiC particles in the Al6061 matrix.</p>

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