Download or read book THE EFFECT OF SOLIDIFICATION RATE AND SOLUTIONIZING QUENCH RATE ON THE MECHANICAL PROPERTIES AND HARDENING RESPONSE OF ALUMINUM ALLOYS written by and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract : A comparative study of five aluminum alloys was performed to characterize the effect of solidification rate and quench rate on casting microstructure and properties. The alloys were cast in the geometry for Jominy End Quench (JEQ) testing, so as to take advantage of the JEQ test's ability to give data on multiple quench rates in a single sample and illustrate the quench sensitivity of an alloy. While the Jominy End Quench test has been used in aluminum alloys, the effects of solidification rates have not been assessed in depth. The work done by other studies has either focused on a single alloy across multiple solidification rates, or on multiple alloys using a single solidification rate. To this end, three molds were created: a sand mold, a semi-permanent mold and a permanent mold, with the intent of casting JEQ bars out of multiple aluminum alloys for direct comparison. The tensile strength, hardness, porosity, and electrical conductivity were assessed, in an attempt to compare the quench sensitivities of the samples. This study will provide a starting point for more in-depth analyses of the alloys, i.e. the kinetics of precipitation strengthening over a range of length scales (cooling rates).
Download or read book The Effect of Solidification Rates and Thermal Gradients in an Aluminum Alloy written by Frank John Worzala and published by . This book was released on 1958 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 The Effect of Quenching Rate on Aging Response and Mechanical Properties of Al 7wt Si 0 3Wt Mg Casting Alloy written by Stiliana Raynova and published by . This book was released on 2002 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solidification Rate Effects in Metal matrix Composites written by Andreas Michael Borchert and published by . This book was released on 1991 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Methodology to Predict the Effects of Quench Rates on Mechanical Properties of Cast Aluminum Alloys written by and published by . This book was released on 2006 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Production Conditions on Physical and Mechanical Properties of Aluminum with Low Iron Concentrates written by Ali Akbar Nayebhashemi and published by . This book was released on 1980 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solidification of Aluminum Alloys written by Men G. Chu and published by Wiley-TMS. This book was released on 2004-03 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume addresses progress in the application of solidificationprinciples to the production of aluminum alloys. Topics includemicrostructure evolution, phase formation and solidification pathanalysis, grain refinement, micro/macro-segregation, mechanicalbehavior/properties in the mushy state, solidificationcracking/tearing, gas/shrinkage porosity formation, effect ofimpurities/trace elements, and the impact of cast structure on thesubsequent fabrication and properties of finished products. Paperson the experimental or theoretical simulation of solidificationaspects of casting processes including direct chill casting,continuous casting, shaped casting, semi-solid processing, andother advanced casting technologies are also included, as well asexamples showing the use of solidification principles to solveindustrial problems. From ahref="http://www.tms.org/Meetings/Annual-04/AnnMtg04Home.html"target="_blank"2004 TMS Annual Meeting/a to be held inCharlotte, North Carolina, March 14 - 18, 2004.
Download or read book Al Si Alloys written by Francisco C. Robles Hernandez and published by Springer. This book was released on 2017-07-02 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book details aluminum alloys with special focus on the aluminum silicon (Al‐Si) systems – that are the most abundant alloys second only to steel. The authors include a description of the manufacturing principles, thermodynamics, and other main characteristics of Al‐Si alloys. Principles of processing, testing, and in particular applications in the Automotive, Aeronautical and Aerospace fields are addressed.
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 Rapid Solidification Technology written by T.S. Sudarshan and published by CRC Press. This book was released on 1993-12-20 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapid solidification processing results in increased strength, and fracture and fatigue resistance of alloys, with concurrent improvements in mechanical, physical and chemical properties. This volume provides a systematic examination of this technology, including metallurgical aspects, processing methods, alloy design, and applications. Each chapter was prepared by a specialist for this volume. The text is well illustrated with more than 400 micrographs and schematics. More than 75 tables provide important reference data.
Download or read book Quench Sensitivity of 6xxx Aluminum Alloys written by Adam Assaad and published by . This book was released on 2016 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of AA6xxx series alloys continues to grow with the increasing demand for more fuel efficient vehicles. AA6xxx series alloys are commonly used in automotive applications because of their extrudability and good strength/weight ratio. As the use of these alloys becomes more prominent, new technologies must be developed to improve them. Chromium has been used as an alloy addition to AA6xxx alloys to control the grain structure by creating dispersoids that pin grains and limit grain growth and thereby improve the mechanical properties of aluminum alloys. However, the addition of chromium and other transition metals can have some adverse effects on aluminum alloys including making them more quench sensitivity after processing. The objective of this research was to do study the effect of alloy composition including the effect of Cr on the quench sensitivity of AA6xxx aluminum alloys, and to measure the effect of quench sensitivity on subsequent mechanical properties both in the T4 (naturally aged) and T6 (artificially aged) temper conditions. The experiments were conducted using a standard Jominy quenched end test and also included tensile testing for various quenching conditions for the AA6xxx alloys studied. The Jominy test provided a large range of cooling rates, which provided data for the variation in hardness as a function of cooling history. Supplemental tests were done on the alloys using tensile samples and water, air and furnace cooling to see what effect these cooling histories had on mechanical properties. It was found that the addition of Cr and Mn to the AA6xxx alloy caused an increase in quench sensitivity, and the cooling rate during quenching had a strong effect on the mechanical properties. It was found that AA6063 can be air cooled or cooled at a rate of ~0.8°C/s (48°C/s) after extrusion to retain 90% of its peak yield strength. Composition 1 (high Cr) must be cooled at a rate of at least ~25°C/s (1500 °C/min) in order to retain 90% of its peak yield strength. Composition 3 (high Cr and Mg) must be cooled at a rate of ~30°C/s in order to retain 90% of its peak yield strength.
Download or read book The Effect of Rate of Solidification on Hot Tearing in Aluminum Alloys written by Jacob D. Gubbay and published by . This book was released on 1956 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quench Sensitivity in 6xxx Series Aluminium Alloys written by Katharina Strobel and published by . This book was released on 2013 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quench sensitivity, the dependence of strength and hardness on the cooling rate after extrusion or solution treatment, limits the applications of extrusions of heat treatable aluminium alloys. Reduced properties in slow cooled samples have long been attributed to the loss of solute on heterogeneous nucleation sites during cooling. While minimum cooling rates to avoid precipitation of Mg-Si-containing phases and reduced properties have been mapped out for a broad range of commercial alloys, little is understood about the physical mechanisms leading to quench sensitivity. In this investigation the difference in hardness evolution between slow cooled and fast quenched samples of various commercial and model Al-Mg-Si alloys has been determined for a broad range of natural and artificial ageing times. This has demonstrated that the artificial ageing response of fast quenched samples differs greatly from the artificial ageing response of slow cooled samples. In contrast to fast cooled samples, where natural ageing has a negative effect, the artificial ageing response of slow cooled samples is less dependent on natural ageing time. As a result, hardness differences between fast and slow cooled samples is large during artificial ageing after short natural ageing times, but small after long natural ageing times, such that quench sensitivity strongly varies. In order to explain this phenomenon, the cooling rate dependent microstructural development has been investigated using hardness measurements, electron microscopy (SEM and TEM), differential scanning calorimetry (DSC) and positron annihilation lifetime spectroscopy (PALS). From TEM investigations and theoretical considerations of the diffusion range it has been determined that solute is only lost from a limited region around the non-hardening precipitates forming during cooling on secondary dispersoids. The increased age hardening rate in fast cooled samples after short natural ageing times is therefore the result of a high vacancy supersaturation rather than a high solute supersaturation compared to slow cooled samples. Non-equilibrium vacancies appear to act as precipitation sites for the precursor of the strengthening [beta]"--Precipitates. In slow cooled samples the formation of [beta]"-precipitates seems to be suppressed. In lean alloys with a low solute content, such as the investigated AA6060, the age hardening response is almost independent of the cooling rate. Small additions of Cu or changes in the Mg:Si-ratio in alloys with a combined Mg+Si-content greater than 1 wt.% have little effect on precipitation of non-hardening phases during cooling, but affect natural and artificial ageing behaviour. The cooling rate after extrusion or solution treatment was also found to affect whether natural ageing has a negative effect or not. In fast cooled samples of Al-Mg-Si alloys with combined Mg+Si-contents greater than 1 wt.% the decrease in ageing kinetics due to the decrease of non-equilibrium vacancies with increasing natural ageing time contributes to the negative effect. In slow cooled samples the initial number of quenched-in vacancies is low, such that ageing kinetics are independent of the natural ageing time.
Download or read book A Study of the Effects of Iron and Silicon on the Solidification Behavior of 7075 Aluminum written by William J. Whealon and published by . This book was released on 1993 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Solution Treatment Time and Quench Rate on Microstructure and Mechanical Properties of High Magnesium Aluminum Magnesium Alloys written by Reuben H. Shirah and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminum alloys containing 8-10 wt pct magnesium with further minor additions of Cu and Mn were solution treated for either 10 hours or 24 hours and subsequently quenched in either oil or water. Microstructural analysis by transmission electron microscopy and optical microscopy demonstrated that a 24-hour solution treatment when followed by water quenching was effective in retention of Mg in solution promoting more uniform precipitation during subsequent warm rolling, especially in an alloy containing 8.14 wt pct Mg-0.41 wt pct Cu. Tension and fatigue testing revealed improved fatigue resistance for this alloy when comparison was made to shorter solution treatment times and less severe quench conditions. The addition of Mn, possibly in conjunction with increased solution treatment temperature, appears to be especially effective in development of a homogeneous microstructure; an alloy containing 10.2 wt pct Mg-0.52 wt pct Mn exhibited a yielded strength of 398 Mpa (57.8 Ksi), a tensile strength of 455 Mpa (75.8 Ksi) with 11 pct elongation to fracture. (Author).
Download or read book The Treatment of Liquid Aluminum silicon Alloys written by John E. Gruzleski and published by . This book was released on 1990 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
