Download or read book Investigation of Quasi static Dynamic Mechanical Properties of Functionally Graded Sic particulate Reinforced Aluminium Metal Matrix Composites written by Uygar Yıldırım and published by . This book was released on 2004 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Functionally Graded Material (FGM) systems composing of SiC-particulate reinforced Al Metal Matrix Composites (MMCs) of varying reinforcement volume fractions were prepared using a powder metallurgy route and investigated for mechanical properties under compression at quasi-static and high strain rates. High strain rate tests in the range of 1000-3000s-1 were conducted using a compression type Split Hopkinson Pressure Bar (SHPB) set-up. The compression true stress-strain curves of the tested elastic-plastic FGM systems were satisfactorily approximated using the equal-stress model while the high strain rate testing in SHPB involved complex wave propagation events between the layers of FGM. The samples failed under compression at high strain rates particularly at the interface of the layer of the lowest impedance. This result was also confirmed with LSDYNA3 finite element modeling of a 10 and 20% SiC layered composite material system. The model has shown that higher compressive stress-time history occurred in the layer of the lowest impedance during SHPB testing.Microscopic observation of the failed samples was further shown that the mechanically weakest link of the layered samples was the interfaces between the layers. This was solely due to the formation of a thin oxide layer at the interfaces. The modeling results were further found to be promising in modeling of FGM systems for future investigations.
Download or read book Affordable Metal Matrix Composites for High Performance Applications II written by Awadh B. Pandey and published by John Wiley & Sons. This book was released on 2013-09-23 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will include papers on recent research carried out in the field of metal-matrix composites (MMCs). Processing, microstructure, and mechanical properties of MMCs and unreinforced matrix alloys will be covered with a focus on aluminum, titanium, nickel, and copper MMCs. Those involved in the research of MMCs and unreinforced alloys, particularly in aerospace, space, and automotive materials research, will find this volume indispensible. From Materials Science & Technology 2003 to be held in Chicago, Illinois, November 9-12, 2003.
Download or read book Coatings written by Kaushik Kumar and published by Springer Nature. This book was released on 2021-02-01 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents recent developments in the coating processes, sub processes and emphasizes on processes with the potential to improve performance quality and reproducibility. The book demonstrates how application methods, environmental factors, and chemical interactions affect each surface coating's performance. In addition, it provides analysis of latest polymers, carbon resins, high-temperature materials used for coatings and describes the development, chemical and physical properties, synthesis, polymerization, commercial uses and characteristics for each raw material and coating. Characterization techniques to solve the coating problems are also presented, as well as optimization studies to identify the critical coating parameters to ensure a robust process.
Download or read book Silicon Carbide Particulate Reinforced Aluminum Alloys Matrix Composites Fabricated by Squeeze Casting Method written by Adem Onat and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Matrix Composites (MMCs) are now attracting enormous interest, because of their superiority in strength, stiffness, wear resistance, elevated temperature strength or other engineering properties. Parallel to commercialisation, there are research centres throughout the world that are actively researching further development and exploitation of net or near net shape fabrication process. In this book, the production and characterisation of SiC particles reinforced Al alloy matrix composites produced by squeeze casting are investigated. The effects of volume fraction of SiC on microstructure, mechanical properties are examined as well. Also the results of the production of gravity cast matrix alloy, to determine the effect of pressure on microstructure and properties are described in this book.
Download or read book An Experimental Study of the Dynamic Mechanical Properties of an Al SiC W Composite written by A. Marchand and published by . This book was released on 1986 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents initial results of an experimental study of the dynamic deformation and dynamic fracture behavior of a 2124-T6 aluminum alloy reinforced with 13.2 v/o Silicon carbon whiskers. Results are compared with the quasistatic behavior and with the behavior of the unreinforced 2124-T6 aluminum alloy. Two types of tests are described, one to provide static and dynamic stress-strain curves of the material in shear and the other to measure static and dynamic values of the critical stress intensity factors, K sub Ic and K sub Id, for tensile fracture. Results show that the presence of the reinforcing whiskers raises the dynamic and static flow stress of the material in shear. It is also evident that the reinforced material has considerably more ductility in shear than it has in axial deformation. As expected, the fracture response, as measured by the critical stress intensity factor K sub Ic, is not as favorable for the reinforced material as for the unreinforced. However, dynamic loading raises the value of K sub Ic for the reinforced material while producing almost no change in the unreinforced. For the reinforced material, the rate of loading is important in determining toughness, as measured by the value of K sub I, but has little influence on the stress-strain behavior in shear.
Download or read book Testing Technology of Metal Matrix Composites written by N. R. Adsit and published by ASTM International. This book was released on 1988 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metal and Ceramic Matrix Composites written by Brian Cantor and published by CRC Press. This book was released on 2003-11-01 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: With contributions from leading experts in their respective fields, Metal and Ceramic Matrix Composites provides a comprehensive overview of topics on specific materials and trends. It is a subject regularly included as a final year option in materials science courses and is also of much industrial and academic interest. The book begins wit
Download or read book Study of Mechanical Properties of Al SiC Composites Using Powder Metallurgy and Ctir Casting written by Mr. Sanjay Sharma and published by Lulu Publication. This book was released on 2021-02-26 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: You are no longer to supply the people with straw for making bricks; let them go and gather their own straw. Israelites using bricks made of clay and reinforced with straw are an early example of application of composites. The individual constituents, clay and straw, could not serve the function by themselves but did when put together. Some believe that the straw was used to keep the clay from cracking, but others suggest that it blunted the sharp cracks in the dry clay. Historical examples of composites are abundant in the literature. Significant examples include the use of reinforcing mud walls in houses with bamboo shoots, glued laminated wood by Egyptians (1500B.C.), and laminated metals in forging swords (AD. 1800). In the 20th century, modern composites were used in the 1930s when glass fibers reinforced resins. Boats and aircraft were built out of these glass composites, commonly called fiberglass. Since the 1970s, application of composites has widely increased due to development of new fibers such as carbon, boron, and aramids, and new composite systems with matrices made of metals and ceramics. This chapter gives an overview of composite materials. The question answer style of the chapter is a suitable way to learn the fundamental aspects of this vast subject. In each section, the questions progressively become more specialized and technical in nature.
Download or read book Metal Matrix Composites by Friction Stir Processing written by Ranjit Bauri and published by Butterworth-Heinemann. This book was released on 2017-08-10 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal Matrix Composites by Friction Stir Processing discusses the capabilities of utilizing friction stir processing (FSP) as a tool to manufacture new materials, such as composites. FSP is considered a tool for grain refinement. However, this work illustrates how FSP has a wider capability due to the material flow and mixing the process offers. This book highlights such aspects by demonstrating the ability of the process to incorporate a second phase and make metal matrix composites (MMCs). The book covers the current research on processing MMCs by FSP, and presents a novel approach of making ductile MMCs by FSP using metal particle reinforcements. - Demonstrates how friction stir processing can be used to make metal matrix composites - Includes a review of different approaches of making metal matrix composites by friction stir processing - Demonstrates the utility of friction stir processing in making new types of non-equilibrium ductile composites - Provides a comparison of properties of friction stir processed composites to those of conventional metal matrix composites
Download or read book Mechanical Properties of Metallic Composites written by Shojiro Ochiai and published by CRC Press. This book was released on 1993-12-17 with total page 823 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides coverage of dispersion-hardened and fibre-reinforced alloys, addressing principal mechanisms, processing and applications. Mechanical behaviour based on dislocation theory and elastic-plastic mechanics is dealt with and data on advanced composites are provided.
Download or read book Heat Treatment and Interface Effects on the Mechanical Behavior of SiC Particle Reinforced Aluminium Matrix Composites written by D. P. Myriounis and published by . This book was released on 2008 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The interface plays a vital role in composites. Strengthening behavior of SiC-particle reinforced aluminium matrix composites relies on load transfer behavior across the interface, whereas toughness is influenced by crack deflection at the boundary between matrix and reinforcement and ductility is affected by relaxation of peak stresses near the interface. In general, metal matrix composites often behave asymmetrically in tension and in compression and have higher ultimate tensile strength, yet lower proportional limits, than monolithic alloys. Such behavior of composites lies with the factors governing matrix plasticity, which can be divided into two areas: those affecting the stress rate of the matrix, and those which alter the flow properties of the matrix through changes in microstructure induced by inclusion of the reinforcement. This work focuses on the characterization of the mechanical response of the interface to stresses arising from an applied load in SiC-particle reinforced aluminium matrix composites. The composites have been studied in the as-received (T1) and in the T6 and modified T6 (HT1) conditions. In the nonequilibrium heat treatment processing of the composites, nonequilibrium segregation arises due to imbalances in point defect concentrations set up around interfaces. Mechanical properties, including microhardness and stress-strain behavior, of aluminum matrix composites containing various percentages of SiC particulate reinforcement have been investigated. The elastic modulus, the yield/tensile strengths, and ductility of the composites were controlled primarily by the volume percentage of SiC reinforcement, the temper condition, and the precipitation hardening.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties of Spray Atomized SiC Particle Reinforced Aluminum Titanium Alloys written by and published by . This book was released on 1990 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the present study, the elevated temperature mechanical behavior and microstructure of Al-Ti-Silicon carbide particulates SiCp metal matrix composites (MMCs) processed by spray atomization and co deposition were investigated. The elevated temperature mechanical properties of the spray deposited and hot extruded materials were studied following a 100 hour exposure at 250, 350, 450 C; the mechanical properties at room temperature were also determined. The results of the present study show that the elevated temperature yield strength of the spray deposited and extruded materials compared favorably to those of an equivalent alloy made by powder metallurgical materials, were superior to those of the ingot material, but were inferior to those of mechanically alloyed Al-Ti materials. The evolution of the microstructure as a result of the thermal annealing was investigated using X-ray diffraction, TEM, and optical microscopy. The results from X-ray diffractometry studies showed extensive precipitation of the equilibrium Al3Ti phase during thermal exposure. In addition, no interfacial reactions were observed.
Download or read book Proceedings written by Murray L. Scott and published by Woodhead Publishing. This book was released on 1997 with total page 836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties of Aluminium Metal Matrix Composite with Silicon Carbide Reinforcement particulate Reinforcement written by Jasvinder Singh and published by . This book was released on 2003 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties Structure Correlation for Commercial Specification of Cast Particulate Metal Matrix Composites written by and published by . This book was released on 2002 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research, the effects of casting foundry, testing laboratory, surface conditions, and casting processes on the mechanical properties of A359-SiC composites were identified. To observe the effects, A359-SiC composites with 20 and 305 SiC particles were cast at three different foundries and tested at three different laboratories. The composites were cast in sand and permanent molds and tested as-cast and machined conditions. To identify the effect of the volume fraction and distribution of particles on the properties of the composites, particle distribution was determined using Clemex Image analysis systems, and particle volume fraction was determined using wet chemical analysis and Clemex Image analysis systems. The microstructure and fractured surfaces of the samples were analyzed using SEM, and EDX analysis was done to analyze chemical reaction between the particles and the matrix. The results of the tensile strengths exhibited that the tensile strengths depend on the density and porosity of the composites; in general the higher tensile strength is associated with lower porosity and higher density. In some cases, composites with lower density were higher than these with higher density. In the Al-20% SiC samples, the composites with more inclusions exhibited a lower tensile strength than the ones with fewer inclusions. This suggests that macroscopic casting defects such as micro-porosity, shrinkage porosity and inclusions appear to strongly influence the tensile strength more than the microstructure and particle distribution. The fatigue properties of A359/20 vol.% SiC composites were investigated under strain controlled conditions. Hysteresis loops obtained from strain controlled cyclic loading of 20% SiCp reinforced material did not exhibit any measurable softening or hardening. The fatigue life of Al-20% SiC heat treated alloy at a given total strain showed wide variation in fatigue life, which appeared to be related to factors such as inclusions, porosity, and particle distribution. The inclusions and porosity on the fracture surfaces seem to have a more significant influence on the fatigue life of cast Al-20% SiC as compared to other variables, including SiC particle volume percentage and its distribution. Striations were generally not visible on the fracture surface of the composites. In many specimens, SiC particle fracture was also observed. Fracture was more severe around pores and inclusions than in the matrix away from them. Inclusions and porosity seem to have a much stronger influence on fatigue behavior than the particle distribution. The analysis suggests that the enhancement of fatigue behavior of cast MMCs requires a decrease in the size of defects, porosity, and inclusions. The particle volume fraction determined using wet chemical analysis gives values of SiC vol.% which are closer to the nominal Sic % than the values of SiC% obtained by ultrasonic and Clemex Image Analysis system. In view of ALCAN's recommendation one must use wet chemical analysis for determining the volume percent SiC.
Download or read book Modeling Dynamic Behavior of Metal Matrix Composites written by İsmail Tirtom and published by . This book was released on 2002 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical investigation has been conducted on the strain rate dependent compression mechanical behavior of a SiC-particulate reinforced Al (2024-O) metal matrix composite. The effect of particle volume fraction on the strain rate sensitivity of the composite was determined using axisymmetric Finite Element unit cell models, where the particles are treated as elastic spheres embedded within a visco-plastic matrix, implemented in LUSAS Finite Element Analysis program. Particles are taken to be elastic, equal-sized, spherical and uniformly distributed in the matrix. The strain rate dependent constitutive behavior of the matrix material uses a linear relation between stress and strain rate formulation and is obtained from independent experimental results on the matrix. The flow stress of the composites is predicted over a range of strain rates for different particle volume fractions. Numerical results of the flow stress and strain rate sensitivity of the composite were also compared with those of experimental results, for 15% SiC particle reinforced 2024-O Al metal matrix composite. Influence of particle shape on the behavior of the MMC at high strain rates is also investigated. A unit cell, which is an elastic cylinder embedded within a visco-plastic matrix, is used. It is also shown that the rate dependent flow stress and local stress in the microstructure are influenced by particle shape. If reinforcement edge sharpness increases, local stress increases at that area. The results show that both the flow stress and the strain rate sensitivity increase with increasing volume fraction of the reinforcement due to the constraining effect of the reinforcement. Numerical calculations have shown an increased strain rate sensitivity of the composite over the matrix alloy. The discrepancy found between numerical and experimental results was finally discussed based on geometrical and microstructural parameters that might affect the composite flow stress and strain rate sensitivity.
