Download or read book Adiabatic Shear Band Formation in Titanium written by M. Laxmi Prasad and published by . This book was released on 1993 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Formation of Adiabatic Shear Bands by Ballistic Impact in a Titanium Alloy written by S. P. Timothy and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spatial Evolution of Adiabatic Shear Localization in Stainless Steel Titanium and Ti 6A1 4V Alloy written by Qing Xue and published by . This book was released on 2001 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adiabatic Shear Localization written by Bradley Dodd and published by Elsevier. This book was released on 2012-05-22 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rev. ed. of: Adiabatic shear localization / Y. Bai and B. Dodd. 1992. 1st ed.

Download or read book Metallurgical Effects at High Strain Rates written by R. Rohde and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: A conference on Metallurgical Effects at High Strain Rates was held at Albuquerque, New Mexico, February 5 through 8, 1973, under joint sponsorship of Sandia Laboratories and the Physical Metallurgy Committee of The Metallurgical Society of AIME. This book presents the written proceedings of the meeting. The purpose of the conference was to gather scientists from diverse disciplines and stimulate interdisciplinary discussions on key areas of materials response at high strain rates. In this spirit, it was similar to one of the first highly successful con ferences on this subject held in 1960, in Estes Park, Colorado, on The Response of Metals to High Velocity Deformation. The 1973 conference was able to demonstrate rather directly the increased understanding of high strain rate effects in metals that has evolved over a period of roughly 12 years. In keeping with the interdisciplinary nature of the meeting, the first day was devoted to a tutorial session of invited papers to provide attendees of diverse backgrounds with a common basis of understanding. Sessions were then held with themes centered around key areas of the high strain rate behavior of metals.

Download or read book The Physics and Mathematics of Adiabatic Shear Bands written by T. W. Wright and published by Cambridge University Press. This book was released on 2002-07-22 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a research monograph on the material instability known as adiabatic shear banding which often occurs in a plastically deforming material as it undergoes rapid shearing. Plastic deformation generates heat, which eventually softens most materials with continued straining, a process which is usually unstable. In this case the instability results in thin regions of highly deformed material, which are often the sites of further damage and complete failure. The main body of the book examines a series of one-dimensional problems of increasing complexity. In this way a comprehensive and quantitative picture of the complete phenomena is built up. Particular care is taken to use well established asymptotic techniques to find simple, but universal, analytic expressions or scaling laws that encapsulate various aspects of the dynamic formation and the final morphology of shear bands. A fully developed mechanics of shear is just beginning to emerge as a major companion to fracture mechanics, this book may speed the process along.

Download or read book Dynamic Damage and Fragmentation written by David Edward Lambert and published by John Wiley & Sons. This book was released on 2019-01-14 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineering structures may be subjected to extreme high-rate loading conditions, like those associated with natural disasters (earthquakes, tsunamis, rock falls, etc.) or those of anthropic origin (impacts, fluid–structure interactions, shock wave transmissions, etc.). Characterization and modeling of the mechanical behavior of materials under these environments is important in predicting the response of structures and improving designs. This book gathers contributions by eminent researchers in academia and government research laboratories on the latest advances in the understanding of the dynamic process of damage, cracking and fragmentation. It allows the reader to develop an understanding of the key features of the dynamic mechanical behavior of brittle (e.g. granular and cementitious), heterogeneous (e.g. energetic) and ductile (e.g. metallic) materials.

Download or read book Split Hopkinson Kolsky Bar written by Weinong W. Chen and published by Springer Science & Business Media. This book was released on 2010-11-11 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors systematically describe the general principles of Kolsky bars, or split Hopkinson bars, which are widely used for obtaining dynamic material properties. Modifications are introduced for obtaining reliable data. Specific experiment design guidelines are provided to subject the specimen to desired testing conditions. Detailed Kolsky-bar examples are given for different classes of materials (brittle, ductile, soft, etc) and for different loading conditions (tension, torsion, triaxial, high/low temperatures, intermediate strain rate, etc). The Kolsky bars used for dynamic structural characterization are briefly introduced. A collection of dynamic properties of various materials under various testing conditions is included which may serve as a reference database. This book assists both beginners and experienced professionals in characterizing high-rate material response with high quality and consistency. Readers who may benefit from this work include university students, instructors, R & D professionals, and scholars/engineers in solid mechanics, aerospace, civil and mechanical engineering, as well as materials science and engineering.

Download or read book Investigation of Adiabatic Shear Bands in Commercial Purity Titanium and Ti 6Al 4V Alloy written by William R. Lonardo and published by . This book was released on 1991 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Crystal Plasticity Finite Element Methods written by Franz Roters and published by John Wiley & Sons. This book was released on 2011-08-04 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by the leading experts in computational materials science, this handy reference concisely reviews the most important aspects of plasticity modeling: constitutive laws, phase transformations, texture methods, continuum approaches and damage mechanisms. As a result, it provides the knowledge needed to avoid failures in critical systems udner mechanical load. With its various application examples to micro- and macrostructure mechanics, this is an invaluable resource for mechanical engineers as well as for researchers wanting to improve on this method and extend its outreach.

Download or read book Dynamic Behavior of Two Advanced Materials written by Zezhou Li and published by . This book was released on 2019 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic deformation occurs when bodies are subjected to rapidly changing loads and can differ significantly from deformation that occurs under static or quasi-static situations. It is of great significance to understand the deformation and failure mechanisms of advanced materials, and there are potential applications in which dynamic deformation and failure can occur. Two classes of advanced materials, ultrafine-grained (UFG) (~500 nm and ~100 nm) titanium and high-entropy alloys (HEAs) (Al0.3CoCrFeNi and CoCrFeMnNi) are the focus of this doctoral investigation. The deformation and adiabatic shear localization at cryogenic temperatures (173 K and 77 K) in ultrafine-grained (100 and 500 nm) titanium are investigated. In comparison with conventionally-grained titanium, the strength of ultrafine-grained titanium is higher due to the classic Hall-Petch effect while the strain-hardening rate approaches zero. Our results show that shear localization in dynamic deformation is also altered. The width of the shear band of coarse-grained titanium decreases from 30 [mu]m at 293 K to 18 [mu]m at 77 K (a 40% decrease). In contrast, for 100 nm titanium, the width of shear band decreases more significantly from 4 [mu]m at room temperature to 1 [mu]m (a 75% decrease) at cryogenic temperature (77 K). This difference is attributed to the combined effects of a decrease in the thermal conductivity and the specific heat capacity, and an increase in the thermal softening, which can lead to a band with thickness of 1 [mu]m. These changes agree with the predictions of the Grady and Bai-Dodd theories. The dislocation evolution and the subgrain rotation mechanisms responsible for forming ultrafine- and nano- recrystallized grains are modeled. In addition, the Zener-Hollomon parameter is incorporated in the analysis to predict the critical dislocation density for shear localization and the recrystallized grain size in titanium . The mechanical behavior of three single-phase face-centered-cubic (fcc) Al0.3CoCrFeNi, annealed CoCrFeMnNi and as-processed CoCrFeMnNi high-entropy alloys (HEAs) was studied in both quasi-static and high strain-rate regimes. Based on Hall-Petch strengthening, solid-solution strengthening, order hardening, cutting forest dislocations, and twinning hardening mechanisms, a constitutive equation was proposed to describe the flow of the annealed CoCrFeMnNi high-entropy alloy under dynamic impact. The resistance to shear localization is being established by dynamically-loading hat-shaped specimens that induce forced shear localization. Adiabatic shear band formation required an imposed shear strain of ~7 for the annealed CoCrFeMnNi HEA and cannot be observed at a strain of 1.1 for the Al0.3CoCrFeNi HEA. The structural and mechanical response that give rise to a remarkable resistance to shear localization are characterized by a combination of (1) a high strain-hardening ability, enabled by solid solution hardening, forest dislocation hardening, order hardening, and twinning hardening, (2) a high strain-rate sensitivity and (3) modest thermal softening; these combination effects give rise to the remarkable resistance to shear localization. First, the low stacking-fault energies in as-received high-entropy alloys lead to the formation of twinned segments inside the coarse grains. Then, when the thermal softening overcomes strain hardening, the shear bands would form, and dynamic recrystallization occurs inside the segments for the further break-up of the grains. Classical Straker equation is applied to predict the critical shear strain for shear localization, which was quite comparable to the experimental values in the high-entropy alloys. It was revealed that the as-processed CoCrFeMnNi HEA was prone to shear localization due to the initially high dislocation density which results in a relatively low work-hardening effect. The dynamic deformation of these two metallic materials leads to adiabatic shear band formation at extreme shear strains. The resultant of the ultrafine grain structure observed in these two materials with diverse structures (HCP for Ti and FCC for HEAs) is remarkably similar and reinforces the concept of rotational dynamic recrystallization as the mechanism responsible for localization.

Download or read book Dynamic Behavior of Materials written by Marc A. Meyers and published by John Wiley & Sons. This book was released on 1994-10-28 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addresses fundamentals and advanced topics relevant to the behavior of materials under in-service conditions such as impact, shock, stress and high-strain rate deformations. Deals extensively with materials from a microstructure perspective which is the future direction of research today.

Download or read book Adiabatic Shear Bands Associated with Plug Formation and Penetration in Impacted Ti 6A1 4V Targets written by Fabiola Martinez and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nanocrystals and Nanostructures written by Claudia Maria Simonescu and published by BoD – Books on Demand. This book was released on 2018-10-17 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocrystals and nanostructures attract a special attention in the recent years due to their various properties and a wide range of applications such as in electrical, optical, optoelectronic, catalytic, medicine, chemo- and biosensing, and environmental protection fields. Although extensive research has been done in the field of nanocrystals, it is considered one growing research field. The main goal of this book is to present the current research activities in the field of nanocrystals and nanostructures covering issues regarding new synthesis methods, self-assembly strategies, characterization techniques, properties, and applications. Interesting reports regarding biomimetic modeling of the biomineralization processes and theoretical models to describe mechanisms of deformation twinning in nanocrystalline and ultrafine-grained materials have been presented. By structuring, approaching, and content, the work may be useful for specialist in the field of nano-/materials science, PhD students, students, and all those interested in this topic of high relevance.

Download or read book Shock Wave and High Strain Rate Phenomena in Materials written by 0 Meyers, and published by CRC Press. This book was released on 2023-07-21 with total page 1852 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings of EXPLOMET 90, the International Conference on the Materials Effects of Shock-Wave and High-Strain-Rate Phenomena, held August 1990, in La Jolla, California, represent a global and up-to-date appraisal of this field. Contributions (more than 100) deal with high-strain-rate deforma

Download or read book Adiabatic Shear Localization written by Yilong Bai and published by Pergamon. This book was released on 1992-01-01 with total page 378 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adiabatic shear localization is a mode of failure that occurs in dynamic loading. It is characterized by thermal softening occurring over a very narrow region of a material and is usually a precursor to ductile fracture and catastrophic failure. This reference source is the first detailed study of the mechanics and modes of adiabatic shear localization in solids, and provides a systematic description of a number of aspects of adiabatic shear banding. The inclusion of the appendices which provide a quick reference section and a comprehensive collection of thermomechanical data allows rapid access and understanding of the subject and its phenomena. The concepts and techniques described in this work can usefully be applied to solve a multitude of problems encountered by those investigating fracture and damage in materials, impact dynamics, metal working and other areas. This reference book has come about in response to the pressing demand of mechanical and metallurgical engineers for a high quality summary of the knowledge gained over the last twenty years. While fulfilling this requirement, the book is also of great interest to academics and researchers into materials performance.

Download or read book Machining of Titanium Alloys written by J. Paulo Davim and published by Springer. This book was released on 2014-07-05 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a collection of examples illustrating the resent research advances in the machining of titanium alloys. These materials have excellent strength and fracture toughness as well as low density and good corrosion resistance; however, machinability is still poor due to their low thermal conductivity and high chemical reactivity with cutting tool materials. This book presents solutions to enhance machinability in titanium-based alloys and serves as a useful reference to professionals and researchers in aerospace, automotive and biomedical fields.