Download or read book Optimizing Mechanical Properties and Thermal Stability of Age Hardenable Aluminum Alloys Through Theoretical Modeling Alloy Modification and Thermal Mechanical Properties written by and published by . This book was released on 2003 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research was concerned with a practical approach to the design of an improved age-hardenable aluminum alloy for moderate temperature application. The process involved extensive empirical research, theoretical simulation and modeling, calculated phase diagrams and first principle calculations and analytical techniques. Microstructure characterization and analytical transmission electron microscopy were employed to refine the development of the quaternary Al-Cu-Mg-Ag phase diagram Differential scanning calorimetry and electron diffraction were implemented to investigate the microstructural evolution of the ternary alloys and to validate calculated equilibrium phase boundaries. Energy dispersive spectroscopy was also used to illustrate the effect of trace additions on the phase boundaries that are important for the thermal stability of this class of alloys. Computer simulation & modeling were used to identify the microstructure that will result in the optimal combination of mechanical properties. Unavailable parameters were calculated from first principle atomistic modeling. The major objective of this research program has been to illustrate the use of modeling and simulation in alloy design and therefore aid in the early insertion of new high performance materials.
Download or read book Optimizing Mechanical Properties and Thermal Stability of Age Hardenable Aluminum Alloys Through Theoretical Modeling Alloy Modification and Thermal Mechanical Processing written by and published by . This book was released on 2005 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proposal was to design and test an Al-Cu-Mg (Ag) alloy for moderate temperatures (up to 150 degrees C) application. A significant improvement in the creep resistance was primarily pursued in the program through enhancement of the yield strength and the thermal stability of the age-hardenable alloy. Major tasks have been finished as planned: 1) We identified the optimum structures of complex multiple secondary phase precipitates using dislocation slip simulation methods that we developed; focusing on Al-Cu-Mg based alloys with Cu: Mg ratios, vs. determined the omega phase as the main strengthening precipitate phase. 2) We constructed a special thermodynamic database (incorporating the metastable omega phase) to determine the absolute Cu and Mg concentration for optimum chemical driving forces of omega phase nucleation. 3) To control the formation (nucleation) of competing precipitate phases, we developed an effective and efficient approach to characterize effects of alloying elements. The computational tools, combining the state-of-the- art across-scale computational methods from first principles calculations to clustering strain analysis. We demonstrated how trace amounts of Mg and Ag additional catalyze omega phase nucleation and identified Si to be deleterious and that it must be eliminated. 4) We accordingly designed new alloys with compositions: Al -(4 to 5) Cu-(O.4 to 0.6) Mg-(O.4 to 0.06) Ag (wt%)with minimal Si content for the optimum strength and second phase thermal stabilities.
Download or read book Heat Treatment of Aluminium Alloy written by Dr. G. Prabhakara Rao and published by Book Saga Publications. This book was released on 2023-11-28 with total page 243 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book, "Heat Treatment of Aluminium Alloy", is essential for anyone looking to unlock the potential of aluminum alloys. It provides comprehensive and detailed information about the properties, classifications, and heat treatment processes of aluminum alloys, enabling readers to design and manufacture components with improved mechanical and wear properties. With this book, readers will gain an understanding of the alloying elements that enhance castability, wear resistance, and hardness, and learn how to modify aluminum alloys to meet their needs. Benefits from reading this book: - Gain an in-depth understanding of aluminum alloys and the heat treatment processes necessary for improved mechanical and wear properties - Learn how to modify aluminum alloys for better castability, wear resistance, and hardness - Discover how the microstructure, machinability, and corrosive behavior affect the performance of aluminum alloys What's included in the book: - Extensive use of aluminum alloys since 1940 - Classification of aluminum alloys into wrought and cast types - Designation systems for aluminum alloys - Impact of different alloying elements - Modification techniques to improve mechanical properties - Various heat treatment processes - Microstructure, machinability, and corrosive behavior Unlock the potential of aluminum alloys with this book. Buy now before the price changes.
Download or read book Correlation of Literature on the Effect of Testing Temperature on the Mechanical Properties of Wrought Aluminum Base Alloys written by Helen R. Pritchard and published by . This book was released on 1955 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hot Deformation and Processing of Aluminum Alloys written by Hugh J. McQueen and published by CRC Press. This book was released on 2016-04-19 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive treatise on the hot working of aluminum and its alloys, Hot Deformation and Processing of Aluminum Alloys details the possible microstructural developments that can occur with hot deformation of various alloys, as well as the kind of mechanical properties that can be anticipated. The authors take great care to explain and differenti
Download or read book The Theoretical Overview of the Selected Optimization and Prediction Models Useful in the Design of Aluminum Alloys and Aluminum Matrix Composites written by Halil Ibrahim Kurt and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The growing attention regarding aluminum alloy matrix composites within the aerospace, automotive, defense, and transportation industries make the development of new engineering materials with the improved mechanical properties. Currently, materials are selected because of their abilities to satisfy engineering demands high for strength-to-weight ratio, tensile strength, corrosion resistance, and workability. These properties make aluminum alloys and aluminum matrix composites (AMCs) an excellent option for various industrial applications. Soft computing methods such as the artificial neural network (ANN), adaptive-neuro fuzzy inference systems (ANFIS), and Taguchi with ANOVA are the most important approaches to solve the details of the mechanism and structure of materials. The optimal selection of variables has important effects on the final properties of the alloys and composites. The chapter presents original research papers from our works and taken from literature studies dealing with the theory of ANN, ANFIS, and Taguchi, and their applications in engineering design and manufacturing of aluminum alloys and AMCs. Also, the chapter identifies the strengths and limitations of the techniques. The ANFIS and ANN approaches stand out with wide properties, optimization, and prediction, and to solving the complex problems while the Taguchi experimental design technique provides the optimum results with fewer experiments.
Download or read book Optimizing the Heat Treatment of High Strength Al Si Mg and Al Cu Mg Zn written by Ibrahim Mohamed Fawzy and published by LAP Lambert Academic Publishing. This book was released on 2015-10-30 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of aeronautical alloys requires the use of these particular alloys for their strength and ductility. These properties can be further enhanced by controlling the added alloying elements as well as the heat treatment parameters. The objective of the present work was to determine the effect of the interactions between element additions and heat treatment on the alloy microstructure and mechanical properties. The present study was carried out to investigate both the formability and mechanical properties of 6xxx alloy series. The slabs (7 x 11 x 1.5 cm each) were machined and homogenized for 10 h at 520 C, followed by air cooling. The results show that a -iron phase displays low formability and hinders deformation of the grains during cold rolling and leads to premature cracking. The cold rolled structure contains elongated grains with broken -Al5FeSi platelet fragments. In the Mn-containing alloy, the -iron phase is more easily deformable while addition of Sr does not improve the alloy behavior. With beryllium additions, the iron intermetallics precipitate in the form of small, globular -Al8Fe2SiBe script particles, in the interdendritic regions."
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1987 with total page 1390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Parametric Analyses of High temperature Data for Aluminum Alloys written by John Gilbert Kaufman and published by ASM International. This book was released on 2008 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is the objective of this book to describe the potential usefulness of parametric analyses in analyzing and extrapolating the properties of aluminum alloys at high temperatures. It is also the intent to illustrate the use of such methods by presenting a broad spectrum of high-temperature creep data for aluminum alloys generated from a single source and developed using consistent testing procedures and practices.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanical Properties and High Temperature Stability of Ti Mo Al Alloys written by T. Hamajima and published by . This book was released on 1973 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt: The phase diagram of the isopleth section of the TI-7 at % Mo-Al system has been improved and expanded to include alloys up to 25 at % aluminum. The mechanical and thermal stability of alloys aged in the two-phase region, beta + Ti3Al, and in the three-phase region, beta + alpha + Ti3,Al, were correlated to the microstructures. Considerable increases in high-temperature strength and ductility, as well as high-temperature stability, were achieved in a Ti-7 at % Mo-16 at % Al alloy by step-aging. (Modified author abstract).
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Influence of the Precipitation state on the Thermal Stability of Severely Deformed Aluminum Alloys written by Rolf Berghammer and published by Cuvillier Verlag. This book was released on 2014-10-29 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: A promising way to increase the strength of aluminum alloys is by grain refinement. Therefore the production of so-called ultra-fine grained (UFG) microstructures by severe plastic deformation (SPD) is a very interesting topic. One of the most common SPD processes is Equal Channel Angular Pressing (ECAP), which was compared to Confined Channel Die Pressing (CCDP) and cold rolling.In the focus of this work lays on the one hand the influence of different precipitation states on the formation of UFG structures and their influence on the mechanical properties and on the other hand it was examined if the thermal stability of these structures can be improved either by supersaturated solid solution(by impurity drag) or by precipitates (by grain boundary pinning).With a better understanding of the ongoing softening mechanisms a good combination of high strength and good ductility can be achievedby alternating SPD and heat treatment.
Download or read book Formable Aluminum Alloys for High Temperature Service written by Leonid Pavlovich Luzhnikov and published by . This book was released on 1965 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metals Abstracts written by and published by . This book was released on 1995 with total page 1602 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elements of Metallurgy and Engineering Alloys written by Flake C. Campbell and published by ASM International. This book was released on 2008-01-01 with total page 671 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical reference provides thorough and systematic coverage on both basic metallurgy and the practical engineering aspects of metallic material selection and application.
Download or read book Quenching Simulation of Aluminum Alloys Including Mechanical Properties of the Undercooled States written by Michael Reich and published by . This book was released on 2012 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Age hardening is the most important heat treatment to strengthen aluminum alloys. It consists of solution annealing, quenching, and aging. During quenching, a supersaturated solid solution is formed which is necessary for the following precipitation of strengthening particles. During quenching, thermal gradients occur in components, which can generate residual stresses and distortion. The finite element method (FEM) has become a very efficient tool in understanding the complex mechanisms of thermal stresses and distortions during heat treatment. Reliable numerical simulations require accurate material properties and realistic constitutive laws. In the case of quenched aluminum alloys, material properties mean the behavior of the undercooled states depending on temperature and microstructure respectively cooling rate. The mechanical properties of these non-equilibrium microstructures are not available yet. Therefore, compression tests and also tension/compression tests of undercooled aluminum alloy EN-AW A6082 (AlSi1MgMn) were performed in a quenching and deformation dilatometer. Samples have been solution annealed and quenched in the dilatometer to varying temperatures with varying cooling rates. Immediately after quenching, deformation tests on quenching temperature have been performed. The results were implemented in the material model of the FEM-Software SYSWELD. Quenching in warm water of an extruded 6082 L-profile with different legs was simulated to understand and predict residual stress and distortion generation. Using the presented model enables to simulate this complex geometry and inhomogeneous heat transfer. The experimental results of quenched 6082 L-profiles verified the above simulations.
