Impact of Dispersion Hardening by Alumina Nano Particles on Mechanical Properties of Al 1100

Composites have tremendous applicability due to their excellent capabilities. The performance of composites mainly depends on the reinforcing material applied. A Graphene nanoparticle (GNP) is successful as an efficient reinforcing material due to its versatile as well as superior properties. Even at very low content, graphene can dramatically improve the properties of polymer and metal matrix composites. In this paper the effects of GNP on composites based on epoxy resin were analyzed. Different contents of GNP (0 – 4.5 vol. %) were added to the epoxy resin. The GNP/epoxy composite was fabricated under room temperature. Mechanical tests result such as tensile, flexural and hardness test show enhancements of the mechanical properties of the GNP/epoxy composite. The experimental results clearly show an improvement in Young’s modulus, tensile strength, and hardness as compared to pure epoxy. The results of this research are strong evidence for GNP/epoxy composites being a potential candidate for use in a variety of industrial applications, especially for automobile parts, aircraft components, and electronic parts such as super capacitors, transistors, etc.

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Effect of T6 Heat Treatment Parameters on Technological Quality of the AlSi7Mg Alloy

Archives of Foundry Engineering ◽

10.1515/afe-2016-0091 ◽

2016 ◽

Vol 16 (4) ◽

pp. 95-100 ◽

Cited By ~ 3

Author(s):

J. Pezda ◽

A. Jarco

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Low Cost ◽

Dispersion Hardening ◽

Recycling Potential ◽

Low Mass ◽

Technological Quality ◽

New Applications ◽

Casting Design

Abstract Very well-known advantages of aluminum alloys, such as low mass, good mechanical properties, corrosion resistance, machining-ability, high recycling potential and low cost are considered as a driving force for their development, i.e. implementation in new applications as early as in stage of structural design, as well as in development of new technological solutions. Mechanical and technological properties of the castings made from the 3xx.x group of alloys depend mainly on correctly performed processes of melting and casting, design of a mould and cast element, and a possible heat treatment. The subject-matter of this paper is elaboration of a diagrams and dependencies between parameters of dispersion hardening (temperatures and times of solutioning and ageing treatments) and mechanical properties obtained after heat treatment of the 356.0 (EN AC AlSi7Mg) alloy, enabling full control of dispersion hardening process to programming and obtaining a certain technological quality of the alloy in terms of its mechanical properties after performed heat treatments. Obtained results of the investigations have enabled obtainment of a dependencies depicting effect of parameters of the solutioning and ageing treatments on the mechanical properties (Rm, A5 and KC impact strength) of the investigated alloy. Spatial diagrams elaborated on the basis of these dependencies enable us to determine tendencies of changes of the mechanical properties of the 356.0 alloy in complete analyzed range of temperature and duration of the solutioning and ageing operations.

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Copper Containing Glass-Based Bone Adhesives for Orthopaedic Applications: Glass Characterization and Advanced Mechanical Evaluation

10.1101/2020.11.19.390138 ◽

2020 ◽

Author(s):

Sahar. Mokhtari ◽

Anthony.W. Wren

Keyword(s):

Mechanical Properties ◽

Photoelectron Spectroscopy ◽

Structural Changes ◽

Viscoelastic Behavior ◽

Polymer Chains ◽

Nano Particles ◽

X Ray Diffraction ◽

X Ray ◽

Compression Data

AbstractThis study addresses issues with currently used bone adhesives, by producing novel glass based skeletal adhesives through modification of the base glass composition to include copper (Cu) and by characterizing each glass with respect to structural changes. Bioactive glasses have found applications in fields such as orthopedics and dentistry, where they have been utilized for the restoration of bone and teeth. The present work outlines the formation of flexible organic-inorganic polyacrylic acid (PAA) – glass hybrids, commercial forms are known as glass ionomer cements (GICs). Initial stages of this research will involve characterization of the Cu-glasses, significant to evaluate the properties of the resulting adhesives. Scanning electron microscopy (SEM) of annealed Cu glasses indicates the presence of partial crystallization in the glass. The structural analysis of the glass using Raman suggests the formation of CuO nanocrystals on the surface. X-ray diffraction (XRD) pattern and X-ray photoelectron spectroscopy (XPS) further confirmed the formation of crystalline CuO phases on the surface of the annealed Cu-glass. The setting reaction was studied using Fourier transform infrared spectroscopy (ATR-FTIR). The mechanical properties of the Cu containing adhesives exhibited gel viscoelastic behavior and enhanced mechanical properties when compared to the control composition. Compression data indicated the Cu glass adhesives were efficient at energy dissipation due to the reversible interactions between CuO nano particles and PAA polymer chains.

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PREPARATION, MORPHOLOGY AND MECHANICAL PROPERTIES OF EPOXY NANOCOMPOSITES WITH ALUMINA FILLERS

International Journal of Modern Physics B ◽

10.1142/s021797921006406x ◽

2010 ◽

Vol 24 (01n02) ◽

pp. 136-147 ◽

Cited By ~ 1

Author(s):

SHEAU HOOI LIM ◽

KAIYANG ZENG ◽

CHAOBIN HE

Keyword(s):

Mechanical Properties ◽

Tensile Testing ◽

Thermomechanical Properties ◽

Nano Particles ◽

Testing Methods ◽

Transmission Electron ◽

Alumina Particles ◽

Thermomechanical Testing ◽

Platelet Shape

This paper presents recent studies on the processing and characterization of epoxy-alumina nanocomposites. Nano-sized alumina particles are incorporated into epoxy resin via solvent-assisted method, so that the particles are dispersed homogeneously in the epoxy matrix. The morphologies, mechanical and thermomechanical properties of the resulting nanocomposites are studied using transmission electron microscope (TEM), conventional tensile testing and thermomechanical testing methods. TEM results show that the alumina nano-particles with a higher specific surface area tend to agglomerate. Furthermore platelet shape particles shows a better dispersion homogeneity as well as better improvement in the mechanical properties of the composites compared to the rod shape particles.

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Epoxy resin filled with primary and secondary raw material – useable in agriculture

Research in Agricultural Engineering ◽

10.17221/23/2013-rae ◽

2014 ◽

Vol 60 (No. 4) ◽

pp. 165-171 ◽

Cited By ~ 2

Author(s):

P. Valášek ◽

J. Kejval ◽

M. Müller

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Epoxy Resin ◽

Filler Particle ◽

Polymeric Materials ◽

Raw Material ◽

Nano Particles ◽

Inorganic Particles ◽

Increase Wear Resistance ◽

Secondary Raw Material

Hard inorganic particles in the interaction with polymeric materials increase wear resistance. Also reactoplastics are suitable for filling with micro- and nano-particles for a purpose of some mechanical properties optimization. The paper compares chosen mechanical properties – hardness, wear resistance and tensile characteristics of epoxy resin filled with artificial corundum with various middle particles sizes and their ratio combination. Mentioned systems can be used in a sphere of the agricultural production at renovation of machine parts, they can serve for creating resistant layers on machines, floors and grillages at the same time. The aim of the carried out experiment is to compare the properties of reactoplastics filled with a primary and secondary raw material and to define an optimum ratio of the filler particle size relating to a given mechanical quality. The artificial corundum was chosen as the primary material, the waste corundum from the process of material mechanical treatment was chosen as the secondary one.    

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Microstructure and mechanical properties of high-manganese-containing high-speed twin-roll cast Al-Mn-Si alloy strips and their cold-rolled sheets

MATEC Web of Conferences ◽

10.1051/matecconf/202032606004 ◽

2020 ◽

Vol 326 ◽

pp. 06004

Author(s):

T.Ha Nguyen ◽

Ram Song ◽

Yohei Harada ◽

Shinji Muraishi ◽

Shinji Kumai ◽

...

Keyword(s):

Mechanical Properties ◽

Solid Solution ◽

High Speed ◽

Solid Solution Hardening ◽

Columnar Dendrite ◽

Dispersion Hardening ◽

High Manganese ◽

Solution Hardening ◽

Cold Rolled ◽

Twin Roll

Al-Mn based alloys with high-manganese content are expected to have improved mechanical properties due to solid solution hardening and/or dispersion hardening. However, the increase of Mn solubility of the alloy is difficult by using the conventional DC casting. In order to solve this problem, in the present study, we focused on the twin-roll casting method which is characterized by high cooling rates. Several kinds of high Mn-containing Al-Mn-Si alloy strips were fabricated by using a vertical-type high-speed twin-roll caster equipped with a pair of water-cooled copper rolls. Direct temperature measurement of the liquid melt during the casting was also performed. The alloy strips of various compositions containing up to 4 Mn and 2 Si (wt%) were successfully obtained. By observing the microstructure of the cross section of the strip, we found the characteristic solidified structure. The solidified structure consisted of three layers. Two solidified shells with a columnar dendrite structure grew from the roll surfaces toward the strip center. In the mid-thickness region, the band structure consisting of equiaxed dendrites and globular grains was observed between the solidified shells. Very fine primary particles were observed in the matrix near the strip surface, while, relatively coarse particles with blocky and needle-like shape were observed in the central band of the as-cast strip. The electric conductivity measurement was performed for the as-cast strips. Mn solubility in Al matrix was estimated from the obtained values. The estimated Mn solubility in the Al-2Mn-xSi strips was between 1.5 ~ 1.8wt% Mn. It was over 1.43wt%Mn for the Al-4Mn-xSi strips. We found that the Mn solubility of the as-cast strips was considerably high. The strips were cold-rolled to the sheets and then annealed at various conditions. They were subjected to the tensile tests, and the effects of solid solution hardening and dispersion hardening are discussed.

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Mechanical Enhancement of Carbon Fiber/Epoxy Composites Based on Carbon Nano Fibers by Using Spraying Methodology

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.245.203 ◽

2012 ◽

Vol 245 ◽

pp. 203-208

Author(s):

Ali Sarim ◽

Bo Ming Zhang ◽

Chang Chun Wang

Keyword(s):

Mechanical Properties ◽

Mechanical Response ◽

High Strength ◽

Weight Percent ◽

Nano Particles ◽

Epoxy Composites ◽

Simultaneous Increase ◽

Short Beam ◽

Percent Improvement ◽

Depth Analysis

Carbon nanofibers have been utilized increasingly for enhancing the mechanical properties of advanced polymer composites, which include high strength, stiffness, toughness, and through-thickness Properties. The incorporation of nano particles with a high aspect ratio and extremely large surface area into polymers improves their mechanical properties significantly. Although a number of efforts have been made to improve various properties by mixing nano particles directly into resin, however, it could lead to high viscosities which create problems during processing. In this particular study, an attempt has been made to enhance mechanical response of nano composites by using, state of the art, a different technique i.e spraying the Carbon Nano Fibers (CNF) on dry perform before infusion. The nano composite samples were prepared using a spraying methodology i.e dispersing the 1.0 weight percent CNF solution on carbon fabric, and evaporating the solvent such that only nano fibers remain on perform, followed by Vacuum assisted resin transfer molding (VARTM). Tensile, compression, flexural and short beam strength tests were performed to evaluate the effectiveness of CNF addition on the mechanical properties of carbon / epoxy composites. Results indicated, CNF addition offered simultaneous increase in all these mechanical properties in different percentages i.e 22–28 percent improvement in tensile strength, 7-11 percent in compressive strength, 14–19 percent in Flexural strength and 45-55 percent short beam strength with respect to the neat composite. The rise in their modulus has also been discussed in detail and part of this study. For in-depth analysis, Microscopic approaches were also carried out to investigate the fracture behavior and mechanism of material. Scanning electron microscopy of fractured surfaces revealed improved primary fiber–matrix adhesion and indications of CNF-induced matrix toughening.

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