Download or read book An Analysis of Microstructure Evolution in Hot Worked Aluminium Subjected to Non linear Deformation written by Magdalena López-Pedrosa and published by . This book was released on 2007 with total page 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 Effect of Strain Path on Microstructure and Crystallographic Texture Evolution in Aluminium Alloy AA5052 written by Oliver Hernandez Silva and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In commercial thermomechanical processing, metals and alloys are often subjected to complex deformation histories, including changes in the strain rate, temperature and strain path. Due to the complicated nature of the sequences of deformations that thermomechanical processes need to create a final product, the strain path experienced by the majority of volume elements in the material is complicated. However, the relationship between the strain path and the microstructure/texture evolution is not well predicted by current models used in industrial processes. The important properties in metals are sensitive to the anisotropic microstructure of the metal produced via thermomechanical processing. This anisotropy includes crystallographic texture, grain shape, the shape and spatial distribution of particles and deformation induced dislocation boundaries. An understanding of the origin of these microstructural features is, therefore, critical for future improvements in properties. To some extent, under linear deformation conditions the evolutions of parameters are well known. This can not be said, however, for non-linear deformation conditions. In this work the effect of strain path on microstructure and texture evolution of the aluminium alloy AA5052 under hot working conditions has been investigated. Specimens were produced with a wide range of strain paths with many also statically annealed to investigate different stages of recrystallization. The microstructures and textures created in the specimens were then studied using electron backscattered diffraction (EBSD) and the subsequent develop of a program that analyses the recrystallization fraction of the material in function of the crystallographic orientatio. The deformed strain path specimens were created using the Arbitrary Strain Path machine at the University of Sheffield, which is capable of torsion and tension/compression testing. Tests from a single step of torsion through to multiple steps with combined forms of strain, using one, two or more steps of deformation with a value of equivalent strain of 0.25 and small reverse deformation for selected tests of equivalent strain of 0.05. I , , The microstructures formed by the applied deformation and annealing processes were analyzed using EBSD to create profiles that show the behaviour of the microstructures and textures under the different strain paths. More detailed analysis was then carried out using in-house software. The program used quaternion geometry to calculate the mean orientation of each grain and then used the deviation from the mean to analyse the extent of substructure within the grains which enabled the recrystallization fraction for each strain path condition to be calculated. The results show a clear difference between the recrystallization behaviour and the respond of microstructure result of strain path with an equivalent strain of 0.05 of deformation applied on the reverse deformation. The small reverse conditions are quite different showing that applying the small reverse deformation after two steps of forward deformation presents material with significant substructure than just two steps of forward deformation, meanwhile when the small reverse deformation is applied after one step of forward deformation the amount of material with significant substructure decreases. 1I.

Download or read book Hot Deformation of Aluminum Alloys II written by Thomas R. Bieler and published by Minerals, Metals, & Materials Society. This book was released on 1998 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: These symposium proceedings from the 1998 TMS Fall Meeting examine the relationships between mechanical behavior and microstructural evolution that must be quantified to develop predictive models for hot deformation. Issues addressed include constitutive modeling; process design and modeling; laboratory simulation of large scale hot working processes; the evolution of microstructure; texture, damage, dynamic precipitation, recovery, and recrystallization processes; creep and superplastic deformation; and the ability to predict phenomena such as corrosion and formability after hot deformation.

Download or read book Recrystallization and Grain Growth III written by and published by . This book was released on 2007 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation and Prediction of Microstructure Evolution in Deformed Aluminum Alloys written by Nabeel Hussain Alharthi and published by . This book was released on 2011 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: The understanding of the microstructure evolution during the deformation processes is very important to predict the mechanical properties of the deformed workpiece. In the present work two aluminum alloys from different series were studied in two different deformation processes.

Download or read book Hot Deformation of Aluminum Alloys III written by Z. Jin and published by Wiley-TMS. This book was released on 2003-01-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings address recent progress in theoretical and experimental studies of hot deformation of aluminum alloys. Technical papers from fundamental research and industrial applications cover such topics as hot deformation mechanisms, evolution of grain structure, texture, precipitates, and damage in thermomechanical processes including rolling, extrusion, forging, superplastic forming, friction stir welding, severe plastic deformation forming, hydroforming, and semi-solid forming. The design and optimization of thermomechanical processes and microstructure using fundamental understanding, development of models, and computer simulation are also addressed. A collection of papers from the 2003 TMS Annual Meeting and Exhibition, which was held in San Diego, California, March 2-6, 2003.

Download or read book Microstructure Evolution of 2024 and 7A09 Aluminium Alloys Subjected to Thermal Cycling in Simulated LEO Space Environment written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical Behavior and Microstructural Evolution During Hot Deformation of Aluminum 2070 written by Henry Jathuren Neilson and published by . This book was released on 2018 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: A third generation Ag-free Al-Li alloy, 2070, is the focus of this dissertation. To determine its suitability for a range of applications, this alloy was first qualified through a series of room temperature mechanical tests. Samples from each orientation (e.g., L, T, or S) were excised from each section of an H-forging to determine the effects of prior work and degree of anisotropy. Samples were then tested at room temperature in tension, compression, and Charpy impact. Room temperature mechanical behavior of as-received H-forgings of 2070 was found to meet or exceed properties of second and third generation Al-Li alloys.The primary focus of this dissertation was to determine the effects of forging conditions (i.e., temperature and strain rate) on flow stress and microstructural evolution during/after hot deformation of this material. Subscale right circular cylinder samples were deformation processed under isothermal conditions at a range of temperatures (T = 300/425/450/475°C) and strain rates (0.01/s, 0.1/s, 5.0/s) to 100% true strain in order to determine these effects on the resulting flow stress and microstructure. Activation energy and power dissipation coefficients were determined for each temperature and strain rate combination followed by microstructure analyses via optical and scanning electron microscopy (SEM).Microstructure analyses included EBSD (electron backscatter diffraction) to determine the degree of dynamic recrystallization (DRX) or dynamic recovery (DRV) present after deformation processing at different temperatures and strain rates. Dynamic recovery was found to be the dominant deformation mechanism for the sample tested at 450°C and 0.01/s. Samples tested at 450°C and 5.0/s or 300°C and any strain rate (0.01, 0.1, or 5.0/s) were found to be dominated by dynamic recrystallization, with a large area fraction of unresolved highly deformed grains. When samples were solution heat treated (at 510°C for 1 hour) after deformation processing, the sample processed at 450°C and 0.01/s was found to have little microstructural change, while the sample processed at 300°C and 5.0/s showed substantial static recrystallization.

Download or read book Microstructural Evolution in the 2219 Aluminum Alloy During Severe Plastic Deformation written by and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous investigations have demonstrated that intense plastic deformation is an attractive procedure for producing an ultrafine grain size in metallic materials. Torsional deformation under high pressure and equal-channel angular extrusion are two techniques that can produce microstructures with grain sizes in the submicrometer and nanometer range. Materials with these microstructures have many attractive properties. The microstructures formed by these two processing techniques are essentially the same and thus the processes occurring during deformation should be the same. Most previous studies have examined the final microstructures produced as a result of severe plastic deformation and the resulting properties. Only a limited number of studies have examined the evolution of microstructure. As a result, some important aspects of ultra-fine grain formation during severe plastic deformation remain unknown. There is also limited data on the influence of the initial state of the material on the microstructural evolution and mechanisms of ultra-fine grain formation. This limited knowledge base makes optimization of processing routes difficult and retards commercial application of these techniques. The objective of the present work is to examine the microstructure evolution during severe plastic deformation of a 2219 aluminum alloy. Specific attention is given to the mechanism of ultrafine grain formation as a result of severe plastic deformation.

Download or read book Metals Abstracts written by and published by . This book was released on 1998 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Light Metals 2012 written by Carlos Suarez and published by Springer. This book was released on 2016-12-23 with total page 1314 pages. Available in PDF, EPUB and Kindle. Book excerpt: An update of the definitive annual reference source in the field of aluminum production and related light metals technologies, a great mix of materials science and practical, applied technology surrounding aluminum, bauxite, aluminum reduction, rolling, casting, and production.

Download or read book Advances in Friction Stir Welding and Processing written by M.-K. Besharati-Givi and published by Elsevier. This book was released on 2014-12-08 with total page 827 pages. Available in PDF, EPUB and Kindle. Book excerpt: Friction-stir welding (FSW) is a solid-state joining process primarily used on aluminum, and is also widely used for joining dissimilar metals such as aluminum, magnesium, copper and ferrous alloys. Recently, a friction-stir processing (FSP) technique based on FSW has been used for microstructural modifications, the homogenized and refined microstructure along with the reduced porosity resulting in improved mechanical properties. Advances in friction-stir welding and processing deals with the processes involved in different metals and polymers, including their microstructural and mechanical properties, wear and corrosion behavior, heat flow, and simulation. The book is structured into ten chapters, covering applications of the technology; tool and welding design; material and heat flow; microstructural evolution; mechanical properties; corrosion behavior and wear properties. Later chapters cover mechanical alloying and FSP as a welding and casting repair technique; optimization and simulation of artificial neural networks; and FSW and FSP of polymers. - Provides studies of the microstructural, mechanical, corrosion and wear properties of friction-stir welded and processed materials - Considers heat generation, heat flow and material flow - Covers simulation of FSW/FSP and use of artificial neural network in FSW/FSP

Download or read book Hot Working Guide written by Y. V. R. K. Prasad and published by ASM International. This book was released on 1997-01-01 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique source book with flow stress data for hot working, processing maps with metallurgical interpretation and optimum processing conditions for metals, alloys, intermetallics, and metal matrix composites. The use of this book replaces the expensive and time consuming trial and error methods in process design and product development.

Download or read book Applied mechanics reviews written by and published by . This book was released on 1948 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: