Multi-Scale Strength Evaluations of SiC Particle Reinforced Aluminum Alloy by Using FEM Superposition Method

2008 ◽  
Vol 33-37 ◽  
pp. 731-736
Author(s):  
Maigefeireti Maitireyimu ◽  
Masanori Kikuchi ◽  
Mamtimin Gheni
Keyword(s):  
Composite Material ◽  
Aluminum Alloy ◽  
Stress Distribution ◽  
Geometric Distribution ◽  
Interface Fracture ◽  
Superposition Method ◽  
Multi Scale ◽  
Material Analysis ◽  
The Matrix ◽  
Sic Particle

This article presents a modified FEM Superpostion method (S-FEM) for composite material analysis. Around the reinforcement body, failure and interface fracture may occur in the matrix. So the S-FEM was employed to detect the stress distribution around the reinforcement. One particle in big matrix is studied. Area of twice of particle radium is selected as local field.First, the feasibility of modified S-FEM is verified. And by symmetric analysis, geometric distribution of particle which may influence on the strength of composite material were discussed.

scholarly journals MORE DETAILSABOUT IMPREGNATION OF CARBON GRAPHITE WITH ALUMINUM

2020 ◽  
pp. 77-82
Author(s):  
V. A. Gulevsky ◽  
N. Yu. Miroshkin ◽  
S. N. Tsurikhin ◽  
O. Yu. Gundrov
Keyword(s):  
Composite Material ◽  
Aluminum Alloy ◽  
Protective Coating ◽  
Open Porosity ◽  
Matrix Alloy ◽  
Lead Alloy ◽  
Inner Surface ◽  
The Matrix ◽  
Porous Frame ◽  
Constant Heating

The process of forming a composite material carbon - graphite-aluminum alloy by impregnation of a porous frame AG-1500 is studied. The technology of filling the open porosity of carbon graphite with a metal melt in a device for impregnation in the mode of constant heating of the furnace is described. The method of applying a protective coating to the inner surface of the pores is shown. It is possible to seal the matrix alloy AK12 in the pores of AG-1500 with lead. It is shown that such processing allows to compact the aluminum alloy and modify it due to the comprehensive pressure of the lead alloy.

Study on the Multi-Scale Nanocomposite Ceramic Tool Material

2006 ◽  
Vol 315-316 ◽  
pp. 118-122 ◽  
Author(s):  
Han Lian Liu ◽  
Chuan Zhen Huang ◽  
Jun Wang ◽  
Bing Qiang Liu
Keyword(s):  
Grain Boundary ◽  
Tool Material ◽  
Particle Dispersion ◽  
Micro Scale ◽  
Multi Scale ◽  
Nano Scale ◽  
Sic Particles ◽  
The Matrix ◽  
Interface Bonding Strength ◽  
Sic Particle

An advanced ceramic cutting tool material was developed by means of micro-scale SiC particle cooperating with nano-scale SiC particle dispersion. With the optimal dispersing and fabricating technology, this multi-scale nanocomposite may get both higher flexural strength and fracture toughness than that of the single-scale composite. The improved mechanical properties may be mainly attributed to the inter/intragranular microstructure with a lot of micro-scale SiC particles located on the grain boundary and a few nano-scale SiC particles located in the matrix grain. Because of the thermal expansion mismatch between SiC and Al2O3 resulting in the compressive stress on the SiC/Al2O3 interface, the interface bonding strength between Al2O3 and SiC was reinforced, which can compel the crack propagating into the relatively weak matrix when meeting the SiC particle on the boundary; while the alumina grain boundary is not the same strong as the SiC/Al2O3 interface and the Al2O3 grain, therefore the crack propagates sometimes along the Al2O3 grain boundaries and sometimes through the grains, when reaching to the nano-scale SiC particle inside the matrix, the crack was pinned and then deflected to the sub-grainboundaries. These coexisting transgranular and intergranular fracture mode induced by micro-scale and nano-scale SiC and the fining of matrix grain derived from the nano-scale SiC resulted in the remarkable strengthening and toughening effect.

scholarly journals Effect of Pore Defects on Mechanical Properties of Graphene Reinforced Aluminum Nanocomposites

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 468 ◽  
Author(s):  
Duosheng Li ◽  
Shengli Song ◽  
Dunwen Zuo ◽  
Wenzheng Wu
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Composite Material ◽  
Stress Distribution ◽  
Large Strain ◽  
Sharp Decrease ◽  
Material Failure ◽  
Element Simulation ◽  
The Matrix ◽  
Good Agreement

Pore defects have an important effect on the mechanical properties of graphene reinforced aluminum nanocomposites. The simulation study found that the pores affect the stress distribution in the matrix of the composite. Along the stretching direction, the larger stress appears on both sides of the pore, which is the source of potential cracks. It results in a sharp decrease in the mechanical properties of the composite. The higher the porosity, the greater the tendency of pore aggregation, and the risk of material failure is higher. The stress distribution in the matrix becomes more uneven as the pore size increases, and the large strain area around the pores also increases. Composites with circular pores have a higher strength than other irregularly shaped pores. The failure mode might be pore cracking, while composites with other shape pores are more prone to interface detachment. The simulation value of the stress-strain of the composite material is in good agreement with the experimental value, but the finite element simulation value is larger than the experimental value.

Microstructure of graphite fibre reinforced aluminum matrix composites

1988 ◽  
Vol 46 ◽  
pp. 988-989
Author(s):  
K.-T. Chang ◽  
J.H. Mazur
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Composite Material ◽  
Aluminum Alloy ◽  
Graphite Fiber ◽  
Fiber Reinforced ◽  
Alloy Matrix ◽  
6061 Aluminum Alloy ◽  
The Matrix ◽  
Aluminum Alloy Matrix

The mechanical properties of fiber reinforced materials are determined by the mechanical properties of the individual components (i.e., the fiber and the matrix) and by the nature of the interface between these components. The interface is responsible for the transfer of the stress between the fiber and the matrix and, consequently, an understanding of the microstructure is essential in order to predict the performance of the composite system.In this work we report our preliminary investigations of the microstructure of graphite fiber reinforced 6061 aluminum alloy matrix composite material. The composite material was prepared in the form of a wire 0.65 mm in diameter from mesophase pitch base graphite fiber embedded in 6061 aluminum alloy matrix (A1 97.87%, Si 0.6%, Cu 0.28%, Mg 1.0%, Cr 0.2%, other trace elements 0.05%). Observations of the microstructure were performed on longitudinal and transverse sections of the composite material wire using light microscopy, scanning electron microscopy and transmission electron microscopy.

The microstructure of a TiB2/Ti-47 Al composite material

1989 ◽  
Vol 47 ◽  
pp. 674-675
Author(s):  
O. Popoola ◽  
A.H. Heuer ◽  
P. Pirouz
Keyword(s):  
Composite Material ◽  
Ion Beam ◽  
Chemical Properties ◽  
Intermetallic Alloys ◽  
Transmission Electron ◽  
Diamond Polishing ◽  
Al Composite ◽  
The Matrix ◽  
Argon Ion ◽  
And Chemical Properties

The addition of fibres or particles (TiB2, SiC etc.) into TiAl intermetallic alloys could increase their toughness without compromising their good high temperature mechanical and chemical properties. This paper briefly discribes the microstructure developed by a TiAl/TiB2 composite material fabricated with the XD™ process and forged at 960°C.The specimens for transmission electron microscopy (TEM) were prepared in the usual way (i.e. diamond polishing and argon ion beam thinning) and examined on a JEOL 4000EX for microstucture and on a Philips 400T equipped with a SiLi detector for microanalyses.The matrix was predominantly γ (TiAl with L10 structure) and α2(TisAl with DO 19 structure) phases with various morphologies shown in figure 1.

REYNOLDS R-301

Alloy Digest ◽  
1954 ◽  
Vol 3 (5) ◽  
Keyword(s):  
Composite Material ◽  
Corrosion Resistance ◽  
Aluminum Alloy ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength ◽  
Heat Treating ◽  
Corrosion Resistant ◽  
Bearing Strength ◽  
High Strength Aluminum Alloy

Abstract Reynolds R301 is a composite material, constituted of a core of high strength aluminum alloy, clad with a corrosion-resistant aluminum alloy. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and compressive, shear, and bearing strength as well as fatigue. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: Al-16. Producer or source: Reynolds Metals Company.

Multi-scale modeling of thermal conductivity of SiC-reinforced aluminum metal matrix composite

2017 ◽  
Vol 51 (28) ◽  
pp. 3941-3953 ◽  
Author(s):  
Xiangyang Dong ◽  
Yung C Shin
Keyword(s):  
Thermal Conductivity ◽  
Metal Matrix Composite ◽  
Matrix Composite ◽  
Metal Matrix ◽  
Scale Model ◽  
Electronic Effects ◽  
Multi Scale ◽  
Aluminum Metal ◽  
Aluminum Metal Matrix Composite ◽  
Sic Particle

High thermal conductivity is one important factor in the selection or development of ceramics or composite materials. Predicting the thermal conductivity would be useful to the design and application of such materials. In this paper, a multi-scale model is developed to predict the effective thermal conductivity in SiC particle-reinforced aluminum metal matrix composite. A coupled two-temperature molecular dynamics model is used to calculate the thermal conductivity of the Al/SiC interface. The electronic effects on the interfacial thermal conductivity are studied. A homogenized finite element model with embedded thin interfacial elements is used to predict the properties of bulk materials, considering the microstructure. The effects of temperatures, SiC particle sizes, and volume fractions on the thermal conductivity are also studied. A good agreement is found between prediction results and experimental measurements. The successful prediction of thermal conductivity could help a better understanding and an improvement of thermal transport within composites and ceramics.

The Estimation of Thermal Conductivity for Alumina-Epoxy Composite Material with High Filling Volume Fraction

2014 ◽  
Vol 918 ◽  
pp. 21-26
Author(s):  
Chen Kang Huang ◽  
Yun Ching Leong
Keyword(s):  
Thermal Conductivity ◽  
Composite Material ◽  
Composite Materials ◽  
Physical Model ◽  
Electron Scattering ◽  
Volume Fraction ◽  
Epoxy Composite ◽  
The Matrix ◽  
Transport Theorem ◽  
Good Agreement

In this study, the transport theorem of phonons and electrons is utilized to create a model to predict the thermal conductivity of composite materials. By observing or assuming the dopant displacement in the matrix, a physical model between dopant and matrix can be built, and the composite material can be divided into several regions. In each region, the phonon or electron scattering caused by boundaries, impurities, or U-processes was taken into account to calculate the thermal conductivity. The model is then used to predict the composite thermal conductivity for several composite materials. It shows a pretty good agreement with previous studies in literatures. Based on the model, some discussions about dopant size and volume fraction are also made.

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