Download or read book The Effect of Stircasting on the Microstructure and Properties of Aluminium silicon Casting Alloys written by Helme bin Hashim and published by . This book was released on 1984 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Friction Stir Processing on the Microstructure and Tensile Behavior of Aluminum Alloys written by Nelson Gomes Affonseca (Netto) and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Friction Stir Processing (FSP) is a promising thermomechanical technique that is used to modify the microstructure of metals locally, and thereby locally improve mechanical properties of the material. FSP uses a simple and inexpensive tool, and has been shown to eliminate pores and also reduce the sizes of intermetallics in aluminum alloys. This is of great interest for research on solidification, production and performance of aluminum alloy castings because FSP can enhance the structural quality of aluminum casting significantly by minimizing the effect of those structural defects. In the literature, there is evidence that the effectiveness of FSP can change with tool wear of the tool used. Therefore, a study was first conducted to determine the effect of FSP time on the tool life and wear in 6061-T6 extrusions. Results showed the presence of two distinct phases in the tool life and wear. Metallographic analyses confirmed that wear in Phase I was due to fracture of the threads of the tool and Phase II was due to regular wear, mostly without fracture. Moreover, built-up layers of aluminum were observed between threads. The microhardness profile was found to be different from those reported in the literature for 6061-T6, with Vickers hardness increasing continuously from the the stir zone to the base material. To investigate the degree of effectiveness of FSP in improving the structural quality of cast A356 alloys, ingots with different quality (high and low) were friction strir processed with single and multiple passes. Analysis of tensile test results and work hardening characteristics showed that for the high quality ingot, a single pass was sufficient to eliminate the structural defects. Subsequent FSP passes had no effect on the work hardening characteristics. In contrast, tensile results and work hardening characteristics improved with every pass for the low quality ingot, indicating that the effectiveness of FSP was dependent on the initial quality of the metal. The evolution of microstructure, specifically the size and spacing of Silicon (Si) eutectic particles, was investigated after friction stir processing of high quality A356 castings with single and multiple passes. Si particles were found to coarsen with each pass, which was in contrast with previous findings in the literature. The nearest neighbor distance of Si particles also increased with each FSP pass, indicating that microstructure became progressively more homogeneous after each pass. In the literature, the improvement observed after FSP of Al-Si cast alloys was attributed to the refinement of Si particles. Tensile data from high quality A356 ingot showed that there was no correlation between the size of Si particles and ductility. To the author's knowledge, this is the first time that the absence of a correlation between Si particle size and ductility has been found.

Download or read book The Effect of Composition and Microstructure on the Machinability of Aluminium silicon Casting Alloys written by Mark B. Jocumsen and published by . This book was released on 1995 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Casting and Solidification of Light Alloys written by Alexander Vorozhtsov and published by MDPI. This book was released on 2020-12-15 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigation of the effect of casting and crystallization on the structure and properties of the resulting light alloys and, in particular, research connected with detailed analysis of the microstructure of light alloys obtained using various external influences of ultrasonic, vibration, magnetic, and mechanical processing on the casting and crystallization are discussed. Research on the study of introduction of additives (modifiers, reinforcers, including nanosized ones, etc.) into the melt during the crystallization process, the technological properties of casting (fluidity, segregation, shrinkage, etc.), the structure and physicomechanical properties of light alloys are also included.

Download or read book On the Microstructure Formation and Mechanical Properties of Aluminium silicon Cast Alloys written by Salem Seifeddine and published by . This book was released on 2005 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Machining of Metal Matrix Composites written by J. Paulo Davim and published by Springer Science & Business Media. This book was released on 2011-09-18 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Machining of Metal Matrix Composites provides the fundamentals and recent advances in the study of machining of metal matrix composites (MMCs). Each chapter is written by an international expert in this important field of research. Machining of Metal Matrix Composites gives the reader information on machining of MMCs with a special emphasis on aluminium matrix composites. Chapter 1 provides the mechanics and modelling of chip formation for traditional machining processes. Chapter 2 is dedicated to surface integrity when machining MMCs. Chapter 3 describes the machinability aspects of MMCs. Chapter 4 contains information on traditional machining processes and Chapter 5 is dedicated to the grinding of MMCs. Chapter 6 describes the dry cutting of MMCs with SiC particulate reinforcement. Finally, Chapter 7 is dedicated to computational methods and optimization in the machining of MMCs. Machining of Metal Matrix Composites can serve as a useful reference for academics, manufacturing and materials researchers, manufacturing and mechanical engineers, and professionals involved with MMC applications. It can also be used to teach modern manufacturing engineering or as a textbook for advanced undergraduate and postgraduate engineering courses in machining, manufacturing or materials.

Download or read book Aluminum and Magnesium Metal Matrix Nanocomposites written by Lorella Ceschini and published by Springer. This book was released on 2016-10-18 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book looks into the recent advances in the ex-situ production routes and properties of aluminum and magnesium based metal matrix nanocomposites (MMNCs), produced either by liquid or semi-solid state methods. It comprehensively summarizes work done in the last 10 years including the mechanical properties of different matrix/nanoreinforcement systems. The book also addresses future research direction, steps taken and missing developments to achieve the full industrial exploitation of such composites. The content of the book appeals to researchers and industrial practitioners in the area of materials development for metal matrix nanocomposites and its applications.

Download or read book Deformation and Fracture Mechanics of Engineering Materials written by Richard W. Hertzberg and published by . This book was released on 1989-01-17 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Third Edition of the well-received engineering materials book has been completely updated, and now contains over 1,100 citations. Thorough enough to serve as a text, and up-to-date enough to serve as a reference. There is a new chapter on strengthening mechanisms in metals, new sections on composites and on superlattice dislocations, expanded treatment of cast and powder-produced conventional alloys, plastics, quantitative fractography, JIC and KIEAC test procedures, fatigue, and failure analysis. Includes examples and case histories.

Download or read book Aluminum Alloy Castings written by John Gilbert Kaufman and published by ASM International. This book was released on 2004-01-01 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: J. G. (Gil) Kaufman is currently president of his consulting company, Kaufman Associates.

Download or read book The Effect of Mechanical Mold Vibration on the Characteristics of Aluminum Alloys written by Jayesh U. Deshpande and published by . This book was released on 2006 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Aluminum-Silicon and Aluminum-Copper alloys are important non-ferrous casting alloys. Different methods have been applied to improve their casting characteristics, their microstructure and consequently, their mechanical properties. Application of mechanical vibrations to the mold during solidification of the alloy is one of these methods. In this study, the effect of controlled mechanical vibrations on the dendrite coherency point, the hot tearing tendency, and the microstructure of B206, B390, and binary Al-7%Si alloys was evaluated. The dendrite coherency point was determined using the two-thermocouple method. The hot tearing tendency was evaluated using the crack susceptibility criterion (CSCb) and by means of measurements using a specially designed ring mold. Microstructure characterization was performed using optical and scanning electron microscopy coupled with image analysis. It was found that mechanical vibrations refine the microstructure of the alloys; and, in the case of B390 alloy, it resulted in significant improvement in the distribution of the primary silicon particles. In the case of B206 and Al-7%Si alloys, where aluminum is the primary phase, mechanical vibrations caused the dendrite coherency point to shift towards lower temperature, i.e., towards higher fraction solid. This shift, together with the refinement of the grain structure, manifested itself in significant reduction in the incidence of hot tearing in B206 castings.

Download or read book Investigation Mechanical Properties and Microstructure of Aluminium Silicon Alloy Using Sand Casting written by Yin Ying Wong and published by . This book was released on 2010 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: This project is to investigate mechanical properties and microstructure of aluminium silicon alloy using sand casting. In this project there were separated into two parts which are foundry laboratory and inspection parameter. In foundry laboratory, a sand casting process was performed by using a diesel furnace to melt the raw material. Then, determinate an optimization of mass degassing agent added in the casting aluminium silicon alloy is to remove the hydrogen element in the casting product. After the casting process, an inspection parameter was performed to investigate the mechanical properties (tensile strength and hardness) and microstructure changed of the aluminium silicon alloys. From the observation of the result, a modified alloys exits slightly higher hardness values than non-modified. Since the coarseness of porosity is proportional to grain size, porosity in fine grained casting is finer and less harmful in fine-grained casting. In additional, shrinkage and hot cracking are usually associated with coarse-grained structure. So, a finer grain size minimizes shrinkage and the mechanical properties, such as tensile is better for fine grained casting than coarse-grained casting. The modified of the casting product by adding the degassing agent inside the casting will give better result mechanical properties in hardness test and tensile strength until an optimization point achieved where there is improvement of mechanical properties.

Download or read book Aluminium Alloys written by Subbarayan Sivasankaran and published by BoD – Books on Demand. This book was released on 2017-12-21 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major issue of energy saving and conservation of the environment in the world is being emphasized to us to concentrate on lightweight materials in which aluminium alloys are contributing more in applications in the twenty-first century. Aluminium and its related materials possess lighter weight, considerable strength, more corrosion resistance and ductility. Especially from the past one decade, the use of aluminium alloys is increasing in construction field, transportation industries, packaging purposes, automotive, defence, aircraft and electrical sectors. Around 85% is being used in the form of wrought products, which replace the use of cast iron. Further, the major features of aluminium alloy are recyclability and its abundant availability in the world. In general, aluminium and its related materials are being processed via casting, drawing, forging, rolling, extrusion, welding, powder metallurgy process, etc. To improve the physical and mechanical properties, scientists are doing more research and adding some second-phase particles in to it called composites in addition to heat treatment. Therefore, to explore more in this field, the present book has been aimed and focused to bridge all scientists who are working in this field. The main objective of the present book is to focus on aluminium, its alloys and its composites, which include, but are not limited to, the various processing routes and characterization techniques in both macro- and nano-levels.

Download or read book Effect of Precipitate Hardening Treatment on Microstructure and Mechanical Properties of Cast Aluminum Silicon Alloy A356 written by Benjunior Bindamin and published by . This book was released on 2012 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this work was to study the influence of the precipitate hardening treatment of the A356 aluminum silicon sand cast alloy. The experiment process was separated into three parts which was foundry laboratory, material laboratory, and inspection. In the foundry laboratory, the cast alloys was prepared by sand casting process and was melted in a diesel furnace. In the material laboratory, the casting was then treated with precipitate hardening treatment and followed by machining. The inspection was done to observe microstructure, tensile properties and hardness properties. The effect of the solution heat treatment and artificial aging holding time on the microstructure, tensile properties, and hardness properties of the alloy was analyzed. Three specimens were heat treated with a solution treatment at a same temperature of 540°C, was quenched in room temperature water followed by artificial aging at a same temperature of 170°C. The different parameters were holding times which were solution at 2 hours and aging 2 hours, solution at 2 hours and aging 6 hours, solution 6 hours and aging 6 hours. The microstructure were investigated and tested by optical microscope, tension test and Rockwell hardness test respectively. The result found was at 2 hours solution of 540 °C homogenization and saturation of magnesium and silicon in Į(Al) phase, spheroid of eutectic Si phase occurred. After solution treatment, 2 hours artificial aging at 170 °C produced hardening precipitates. Samples treated at 6 hours solution and 6 hours artificial aging achieved even higher tensile strength and hardness. The increased of holding time for solution and artificial aging increased precipitate hardening.

Download or read book Advances in Forming Machining and Automation written by Uday S. Dixit and published by Springer Nature. This book was released on 2022-10-03 with total page 655 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected proceedings of the 8th International and 29th All India Manufacturing Technology, Design and Research Conference (AIMTDR 2021). It covers the recent developments in the areas of metal forming and machining techniques, incremental forming, microforming, nesting algorithms, process simulation, parameter analysis, tools and tooling, tool wear, condition monitoring, cyber physical systems, robotics, machine vision, intelligent manufacturing, enterprise manufacturing intelligence, etc. The contents of this book will be useful for students, researchers as well as industry professionals in the various fields of mechanical engineering.

Download or read book Metal Matrix Composites written by Karl U. Kainer and published by John Wiley & Sons. This book was released on 2006-08-21 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the properties of MMCs can be directly designed "into" the material, they can fulfill all the demands set by design engineers. This book surveys the latest results and development possibilities for MMCs as engineering and functional materials, making it of utmost value to all materials scientists and engineers seeking in-depth background information on the potentials these materials have to offer in research, development and design engineering.

Download or read book The Role of Friction Stir Processing on the Microstructure and Mechanical Properties of a Cast Aluminum Alloy written by Saumyadeep Jana and published by . This book was released on 2009 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Al-7Si-0.6Mg is one of the most important cast aluminum alloys because of its attractive mechanical properties and high castability. Microstructurally, the alloy consists of primary aluminum dendrites with eutectic Si particles in the interdendritic region. This makes the alloy quasi-brittle in nature which affects the ductility of the alloy to a great extent. In order to improve the ductility, the eutectic Si particles need to be refined which so far has been achieved by chemical and/or thermal modification. Friction stir processing (FSP) on the other hand can achieve the same through plastic deformation, and therefore replace the cast structure with a wrought microstructure. The eutectic Si particles get refined by at least 50 percent and the aspect ratio also gets reduced. As a result, the FSPed alloy shows improved mechanical properties especially in terms of ductility. Moreover, FSP leads to closure of casting porosities. In the present study it has been observed that these microstructural changes get reflected on the improved fatigue performance by the FSPed alloy. The fatigue life enhances by a factor of five as a result of FSP, when tested using a completely reversed cycle of stress. The life enhancement is even higher at higher stress ratio. Further, FSP caused significant grain refinement inside the stir zone. However, the fine-grain microstructure was found to be unstable at elevated temperatures due to abnormal grain growth (AGG) inside the nugget. Current results indicate that the AGG can be controlled by using selective process parameters as well as run configuration"--Abstract, leaf iv.

Download or read book Advances in Processing of Lightweight Metal Alloys and Composites written by R. Vaira Vignesh and published by Springer Nature. This book was released on 2022-11-18 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the most important aspects of lightweight metal alloys including history, physical metallurgy, overview of production technologies, alloy development, compositing, post-processing (heat treatment, surface engineering, bulk-deformation), and joining methodologies. It discusses the microstructural evolution, fractography, morphology of corroded and worn surface to enable easy understanding of the mechanism. The topics covered in this book include lightweight metallic materials, instrumental characterization of light weight metal alloys and composites, severe plastic deformation processing of aluminum alloys, solid-state welding of aluminum alloys, aluminum metal matrix composite for automotive and aircraft applications, and heat treatment of aluminum metal matrix composites. The book is highly useful for students, researchers, academicians, scientists, and engineers working on lightweight materials.