Download or read book High Temperature Deformation and Recrystallisation of Alpha Iron written by Graham Glover and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microstructure Evolution in Alpha Iron During High Temperature Tensile Deformation written by Phi Hùng Xuân Thành and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The microstructural evolution of alpha iron under tensile deformation at high temperature (T[subscript H]> 0.5) and slow strain-rate (10−5s−1 to 10−5s−1) was investigated. The impetus for this study was the recent observation of Dynamic Abnormal Grain Growth (DAGG) in pure molybdenum under the same testing conditions. A high temperature tensile testing system was refurbished and assembled for this study. The testing system consists of an Centorr 2229 furnace system mounted on an Instron 1331 load frame. I designed the tensile grip and programmed the testing program to obtain data in the stress and strain regime of interest. Testing were done at both UC Davis and Los Alamos National Labs (LANL). Metallography techniques and electron backscattering diffraction (EBSD) technique in a scanning electron microscope were used to characterize the samples after testing. In addition to normal tensile tests at constant strain-rates where DAGG is proposed to occur, a series of strain-rate change tests were designed and performed. Strain-rate change tests were employed to extract activation area information that provided insight into the active mechanism of deformation of the material in addition to the information obtained from analysis of the stress-strain curve and the microstructure via optical microscopy and EBSD. The obtained stress-train curve data were compared with the stress-strain curves data in the literature for alpha iron in similar regime of deformation indicating that the dominant mechanism of deformation is dynamic recovery. The comparison includes past stress-strain curves and the data recorded in the Ashby Map. Optical and EBSD analysis showed that normal grain growth occurred in alpha iron during this testing regime. This lack of grain boundary pinning by impurity differs from that observed in Mo that exhibited DAGG. Activation area analysis showed that the activation area values of Fe are consistent with friction drag from the lattice being the active deformation mechanism. The same activation area analysis reveals that the active mechanism of deformation in the Mo material that exhibited DAGG is impurity drag. These analyses reveal the microstructure evolution of pure alpha iron and provide thought about the difference between Fe and Mo. Although both Fe and Mo have a BCC structure and undergo dynamic recovery for the processing conditions considered, DAGG did not occur in pure Fe. Dynamic recovery and normal grain growth occurred in Fe instead; there was no grain boundary pinning.
Download or read book The Effect of Temperature and Strain Rate of Thermally Activated Deformation in High Purity Alpha Iron written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Grain Boundaries and Nitrogen on the Plastic Deformation of High Purity Iron at Low Temperatures written by Bruce William Christ and published by . This book was released on 1965 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Deformation Temperature and Time on the Recrystallization of Zone melted Iron written by Roger R. Urich and published by . This book was released on 1964 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery and Recrystallization in FCC Metals After High Temperature Deformation written by Ružica Aleksandra Petković-Luton and published by . This book was released on 1975 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deformation and Fracture of Alpha iron at Elevated Temperatures Under Monotonic and Cyclic Loading Conditions written by H. J. Westwood and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Prestrain Temperature on the Strain Aging of Alpha iron written by E. LAUTENSCHLAGER and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Yield point measurements were made on polycrystalline specimens of alpha-iron deformed various amounts at 77, 195 and 273 K; aged; and redeformed at 77, 195, and 273 K. When the prestrain temperature is lower than that subsequent to aging, the yield point return is suppressed relative to specimens deformed at the same temper-ATURE BOTH BEFORE AND AFTER AGING. The degree of suppression is a function of both the magnitude of prestrain at the lower temperature and the difference between the deformation temperatures before and after aging. It is proposed that the suppression is caused by the formation of dislocation barriers during the initial low temperature deformation. The aging kinetics of polycrystalline alpha-iron wires deformed at 77 or 303 K were studies at 44 and 64 C using internal friction measurements. No change was noted as a result of the difference in prestrain temperature. (Author).
Download or read book High Temperature Deformation Mechanisms of Austenitic Iron Alloys written by F. L. Jones and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recrystallization and Related Annealing Phenomena written by F.J. Humphreys and published by Elsevier. This book was released on 2012-12-02 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: The annealing of deformed materials is of both technological importance and scientific interest. The phenomena have been most widely studied in metals, although they occur in all crystalline materials such as the natural deformation of rocks and the processing of technical ceramics. Research is mainly driven by the requirements of industry, and where appropriate, the book discusses the extent to which we are able to formulate quantitative, physically-based models which can be applied to metal-forming processes.The subjects treated in this book are all active research areas, and form a major part of at least four regular international conference series. However, there have only been two monographs published in recent times on the subject of recrystallization, the latest nearly 20 years ago. Since that time, considerable advances have been made, both in our understanding of the subject and in the techniques available to the researcher.The book covers recovery, recrystallization and grain growth in depth including specific chapters on ordered materials, two-phase alloys, annealing textures and annealing during and after hot working. Also contained are treatments of the deformed state and the structure and mobility of grain boundaries, technologically important examples and a chapter on computer simulation and modelling. The book provides a scientific treatment of the subject for researchers or students in Materials Science, Metallurgy and related disciplines, who require a more detailed coverage than is found in textbooks on physical metallurgy, and a more coherent treatment than will be found in the many conference proceedings and review articles.
Download or read book Recent Developments in the Study of Recrystallization written by Peter Wilson and published by BoD – Books on Demand. This book was released on 2013-02-06 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recrystallization is a phenomenon moderately well documented in the geological and metallurgical literature. This book provides a timely overview of the latest research and methods in a variety of fields where recrystallization is studied and is an important factor. The main advantage of a new look at these fields is the rapid increase in modern techniques, such as TEM, spectrometers and modeling capabilities, all of which are providing us with far better images and analysis than ever previously possible. This book will be invaluable to a wide range of research scientists; metallurgists looking to improve properties of alloys, those interested in how the latest equipment may be used to image grains and to all those who work with frozen aqueous solutions where recrystallization may be a problem.
Download or read book High Temperature Deformation Mechanisms of Austenitic Iron Alloys written by Francis Leslie Jones and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Influence of Alloying Elements on the High Temperature Deformation of Iron written by Tobias Lefebre Francois Müller and published by . This book was released on 1960 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions of the Faraday Society written by Faraday Society and published by . This book was released on 1915 with total page 1160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rheology of Solids and of the Earth written by Shun'ichirō Karato and published by . This book was released on 1989 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume provides an overview of rheology for research workers and graduate students in the Earth sciences. As the science of flow, rheology has an important contribution to make in solid earth geophysics, where in recent years attention has been been focused on the physical mechanisms of the Earth's behavior. Examples are the study of the three-dimensional pattern of mantle convection and its rifting, and the nature of the interactions occurring at plate boundaries. The present volume, a translated and revised version of a Japanese work not previously available in English, brings together contributions from a variety of specialized fields: defects and plastic deformation in metals and oxides, mineral and rock deformation, deformation microstructures, and the applications of research in materials science to geological and geophysical problems. Extensive bibliographies will enable readers to follow up specific topics in the literature.
Download or read book Coarsening and High Temperature Deformation of a P M Al Fe V Si Er Alloy written by Kirk Steven Grassett and published by . This book was released on 1994 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mineral and Rock Deformation written by Bruce E. Hobbs and published by American Geophysical Union. This book was released on 1986 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
