Microstructures and Properties of Spinning for Silicon Carbide Particle Reinforced Aluminum Composite

2019 ◽  
Vol 944 ◽  
pp. 571-580
Author(s):  
Hai Bao Wu ◽  
Ji Zhen Li ◽  
De Fu Li ◽  
De Gui Liu ◽  
Guo Qiang Chai
Keyword(s):  
Heat Treatment ◽  
Wall Thickness ◽  
Solution Heat Treatment ◽  
Flow Line ◽  
Aluminum Matrix ◽  
Pipe Blank ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Aluminum Composite ◽  
Spinning Process

In this paper, 15% SiCp/2009A1 composites were subjected to multi-pass hot spinning experiments. The principle of the microstructure and properties of the materials was studied with the increase of thinning rate. The microstructures, interfaces, precipitates and their properties of the tube, which were in the states of spinning, spinning and solution heat treatment were analyzed and discussed.The research shows that it is possible to prepare spinning pipe with good shape and smooth surface by taking use of the spinning process of this paper. During the power spinning process, the force of the rotary wheel to the pipe causes the billet to produce two-way deformation, and the axial and tangential grains are obviously elongated and the flow line is formed.There are mainly Al, SiC, CuAl2and Mg2Si phases in the tube, and the spinning deformation does not change the phase composition of the composites, but the SiC distribution can be more uniform and the oxide film on the surface of the aluminum particles is broken, as a result that the oxygen element will cluster at the interface.The solution heat treatment after spinning can greatly improve the yield strength and tensile strength of SiC/Al composites with a slight decrease in plasticity. The spinning process used in this paper can not only form a composite pipe with a smaller diameter and thinner wall thickness, but it can still be applied when the diameter of the pipe blank becomes larger and the wall thickness becomes thicker.Through the research on spinning process and microstructure, the feasibility of spinning process for preparing aluminum matrix composites pipes was explored, which provided technical and theoretical support for the preparation and processing of Particulate reinforced aluminum matrix composites (PRAMCs) pipes for aviation and aerospace applications.

scholarly journals Effect of T6 Heat Treatment on Microstructure and Hardness of Nanosized Al2O3 Reinforced 7075 Aluminum Matrix Composites

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 44 ◽  
Author(s):  
Peng-Xiang Zhang ◽  
Hong Yan ◽  
Wei Liu ◽  
Xiu-Liang Zou ◽  
Bin-Bing Tang
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Solution Treatment ◽  
Aluminum Matrix ◽  
Aging Treatment ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
X Ray ◽  
T6 Heat Treatment ◽  
The Matrix

In this study, 7075 aluminum matrix composites reinforced with 1.5 wt.% nanosized Al2O3 were fabricated by ultrasonic vibration. The effect of T6 heat treatment on both microstructure and hardness of nanosized Al2O3 reinforced 7075 (Al2O3np/7075) composites were studied via scanning electron microscopy, energy dispersive X-ray spectrometry, X-ray diffraction, transmission electron microscopy, and hardness tests. The Mg(Zn,Cu,Al)2 phases gradually dissolved into the matrix under solution treatment at 480 °C for 5 h. However, the morphology and size of Al7Cu2Fe phases remained unchanged due to their high melting points. Furthermore, the slenderness strips MgZn2 phases precipitated under aging treatment at 120 °C for 24 h. Compared to as-cast composites, the hardness of the sample under T6 heat treatment was increased ~52%. The strengthening mechanisms underlying the achieved hardness of composites are revealed.

A Novel Composite With Nacreous Reinforcement for Corrosion and Wear Reduction

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Yountae Shin ◽  
Huaping Xiao ◽  
Hong Liang
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Wear Resistance ◽  
Aluminum Matrix ◽  
Corrosion And Wear ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Powder Metallurgy Process ◽  
Wear Reduction ◽  
Metallurgy Process

This paper explores new approaches in design and fabrication of novel composite materials in order to increase corrosion and wear resistance. By mimicking nature, nacreous particles from seashells were used as reinforcement in an aluminum matrix. A powder metallurgy process was developed to fabricate the nacreous-reinforced-aluminum matrix composites. Mechanical properties, corrosion, and wear resistance were characterized. Experimental results showed that the corrosion resistance increases as the nacreous concentration increases. The hardness and wear resistance increased by up to 22% and 10%, respectively. With oxidation of aluminum during heat treatment, the mentioned properties were further improved by about 32–37%.

scholarly journals HEAT TREATMENT OF ALUMINIUM MATRIX COMPOSITE (AMC) REINFORCEMENT ORGANOCLAY FOR AUTOMOTIVE APPLICATION

2017 ◽  
Vol 5 (2) ◽  
Author(s):  
Yulius Eka Agung
Keyword(s):  
Heat Treatment ◽  
Artificial Aging ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Automotive Application ◽  
Aluminum Matrix Composites ◽  
Metal Composite ◽  
Matrix Composites ◽  
Aluminium Matrix Composite ◽  
Xrd Pattern

Aluminum Matrix Composites (AMC) reinforced montmorillonite (MMT) was performed using cationic surfactant , Artificial Aging and stir casting method. The content of MMT as a filler is 3%wt. Characterization were performed using Xray Difractometer, ultrasonic testing, SEM, and Hardness Vickers. The results show increase in crystallographic parameter, decrease in density, shiffting in XRD pattern and increase in hardness.Keywords: metal, composite, matrix, aluminum, AMC, MMC, organoclay, heat treatment MMT, artificial aging,stir casting, automotive

Extrusion of Hard Alloys

2000 ◽  
pp. 187-211
Keyword(s):  
Aluminum Alloys ◽  
Wall Thickness ◽  
Material Flow ◽  
Aluminum Matrix ◽  
The Other ◽  
Alloying Elements ◽  
Aluminum Matrix Composites ◽  
Hard Alloys ◽  
Matrix Composites ◽  
Circle Diameter

Abstract This chapter discusses the extrusion characteristics of hard aluminum alloys, particularly those in the 5000 and 7000 series. It begins with a review of two studies, one showing how the extrudability of 7xxx alloys varies with the presence and amount of different alloying elements, the other relating minimum wall thickness with circumscribing circle diameter. It then explains how oxides on either the billet or container complicate the control of extrusion as well as auxiliary processes and how material flow and the movement of trapped gasses in different regions of the extrusion can lead to defects and variations in strength. It also discusses the extrusion of aluminum matrix composites and explains how composite billets are made.

The Wear Performance at High Temperatures of ZrO2-Reinforced Aluminum Matrix Composites Produced by Mechanochemical Reaction Method

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Dogan Sımsek ◽  
Dursun Ozyurek
Keyword(s):  
Aluminum Matrix ◽  
Mechanochemical Reaction ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Composite Powders ◽  
Aluminum Composite ◽  
Wear Performance ◽  
Reaction Method ◽  
The Matrix ◽  
Pin On Disc

Abstract In this study, high-temperature wear performance of A356+Gr-ZrO2 aluminum matrix composites (AMCs) produced by the mechanochemical reaction method was investigated. After the aluminum composite powders were cold-pressed (750 MPa), the green compacts were sintered under 10−6 mbar vacuum for an hour at 550 °C. Sintered AMCs have been characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), hardness and density measurements. Wear tests were conducted in two different loads (10 N and 30 N), five different temperatures, and three different sliding distances in the standard pin-on-disc type wear tester. Result showed that ZrO2 added to the matrix tends to cluster in grain boundaries. AMCs hardness and densities increased with the increasing amount of reinforcement, and the highest hardness and density value was obtained with 12% ZrO2-added AMCs. Weight loss increased with increasing load and temperature and decreased with increasing amount of reinforcement in the matrix at all loads and temperatures.

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