Download or read book Strain Rate History Effects in Body Centered Cubic Metals written by J. Duffy and published by . This book was released on 1982 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper presents a discussion of the strain rate history effects that occur during the deformation of body-centered-cubic (BCC) metals. It is divided into two parts: a brief review of previous work, which also includes some new data, followed by an analysis of material behavior based on previous and new results. The review discusses early experiments on steels and other BCC metals in which interrupted tests were performed. These tests consist of loading initially at one strain rate, unloading, and reloading at a second strain rate, either higher or lower than the first. Early experiments of this type had revealed a substantial difference in response between BCC and face-centered-cubic (FCC) metals. The review also includes results of incremental strain rate tests with large jumps in strain rate, augmented by a series of experiments designed to study strain rate history effects in steel. The latter consist of incremental tests performed on specimens of an AISI 1020 hot-rolled steel over the temperature range 83 K
Download or read book Mechanical Testing for Deformation Model Development written by R. W. Rohde and published by ASTM International. This book was released on 1982 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book High Strain Rate Deformation Mechanisms of Body Centered Cubic Material Subjected to Impact Loading written by William Visser and published by . This book was released on 2017 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Material Behavior Under High Stress and Ultrahigh Loading Rates written by John Mescall and published by Springer Science & Business Media. This book was released on 2013-03-07 with total page 327 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Army Materials and Mechanics Research Center in coopera tion with the Materials Science Group of the Department of Chemical Engineering and Materials Science of Syracuse University has been conducting the Annual Sagamore Army Materials Research Conference since 1954. The specific purpose of these conferences has been to bring together scientists and engineers from academic institutions, industry, and government who are uniquely qualified to explore in depth a subject of importance to the Department of Defense, the Army, and the scientific community. The proceedings of this conference, entitled MATERIAL BEHAVIOR UNDER HIGH STRESS AND ULTRAHIGH LOADING RATES, will be published in two parts. The topics covered in the present volume include dynamic plasticity, adiabatic shear/localized deformation, and dynamic fracture mechanics. Papers dealing with ordnance applica tions, projectile launch environment, and recent work-in-progress will appear as an AMMRC Technical Report and will have more limited distribution in accordance with recent Army guidelines. The Conference Chairmen are particularly grateful to the members of the Program Committee. We wish also to acknowledge the assistance of Mr. Charles Polley of the Army Materials and Mechanics Research Center, Mr. Robert Sell, Ms. Helen Brown DeMascio, and Ms. Mary Ann Holmquist of Syracuse University throughout the con ference planning stages and the publication of the text. The continued active interest in and support of these confer ences by Dr. E. Wright and Col. George Sibert, Direct and Deputy Director/Commander, respectively, of the Army Materials and Mechan ics Research Center, is appreciated.
Download or read book Materials at High Strain Rates written by T.Z. Blazynski and published by Springer Science & Business Media. This book was released on 1987-07-31 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASTM Special Technical Publication written by and published by . This book was released on 1982 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Constitutive Relation for Deformation Twinning in Body Centered Cubic Metals written by Ronald W. Armstrong and published by . This book was released on 1973 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: A constitutive relation is developed to describe the grain size, temperature and strain rate dependence of the stress required for the essentially elastic twinning of body centered cubic (bcc) metals at low temperatures. The relation is derived from a description of the bulk material strain produced by twinning and, also, from specifying on the basis of a thermal activation analysis the number of twins and the twinning nucleation rate. Two natural consequences of this development for bcc metals are that twins must be nucleated by pre-twinning slip and that twinning and brittle fracture are predicted to occur under very similar circumstances. These are normal experimental observations. (Author).
Download or read book Advances in Constitutive Relations Applied in Computer Codes written by Janusz R. Klepaczko and published by Springer Science & Business Media. This book was released on 2010-06-10 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many important industrial applications incline toward better understanding of the constitutive properties of matter. Nowadays, the development of measurement possibilities, even in nanoscale, allows for multiscale formulations that drive to the more sophisticated models used in continuum mechanics. These phenomenological models are particularly important and useful for solutions of very concrete initial boundary value problems. Our interests are focused mainly on detailed descriptions of material behavior that depend not only on simple stress-strain relationships but also includes the strong influence of loading type, which introduces temperature, strain rate dependence, fracture, etc. Understanding these physics phenomena is of fundamental importance for successful and responsible computations. In particular, using the popular commercial programs requires deep understanding of constitutive formulations and their restrictions. These lectures are addressed to industrial users who are responsible for making crucial decisions in design, as well as, to young scientists who work on new models that describe the behavior of materials which also account the new influences and reflect the complexity of the material behavior. At the end, let me express my gratitude to the lecturers of the CISM course No. 328 on “Advances in Constitutive Relations Applied in Computer Codes”, held in Udine in July 2007, who finally prepared the included materials. Unfortunately, during the preparation and collecting papers for this book, our friend and colleague Prof. Janusz R. Klepaczko passed away. This is a very big loss for the society of mechanics.
Download or read book The Relation of Thermally Activated Flow in BCC Metals and Ferritic Steels to Strain Rate History and Temperature History Effects written by J. Klepaczko and published by . This book was released on 1981 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ASM Handbook written by and published by . This book was released on 1990 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt: These volumes cover the properties, processing, and applications of metals and nonmetallic engineering materials. They are designed to provide the authoritative information and data necessary for the appropriate selection of materials to meet critical design and performance criteria.
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 Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992-11 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of the Strain rate Sensitivity at High Strain Rates in FCC and BCC Metals written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The development of a constitutive model based on the use of internal state variables and phenomenological models describing glide kinetics is reviewed. Application of the model to the deformation of fcc metals and alloys is illustrated, with an emphasis on the behavior at high strain rates. Preliminary results in pure iron and 4340 steel are also presented. Deformation twinning is observed in iron samples deformed in the Hopkinson pressure bar. The influence of twinning on the proposed constitutive is discussed. 11 refs., 8 figs.
Download or read book The Effect of Fabrication History and Microstructure on the Mechanical Properties of Refractory Metals and Alloys written by Albert G. Imgram and published by . This book was released on 1963 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the present knowledge concerning the relationship among fabrication history, metallurgical structure, and the mechanical properites of the refractory metals columbium, tantalum, bolybdenum, and tungsten, and their alloys. These are the refractory metals currently reveiveing the most attention for aerospace applications, and are therefore the materials considered in this survey. The report is organized into three main sections, titled ''Fabrication'', ''Microstructure and Alloying'', and ''Interstitial Impurities''. The data presented were selected as those which best illustrate the topics discussed. Descriptions of the metaljurgical principles involved are included. Suggestions for optimizing mechanical properties by controlling metallurgical structure are made where possible. (Author).
Download or read book Shock Waves and High Strain Rate Phenomena in Metals written by Mare Meyers and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scientific understanding of high-velocity deformation has advanced substantially during the past decade. On the one hand, the framework for a theory explaining the metallurgical effects of shock waves is beginning to take shape; on the other hand, the technological applications of high strain-rate processes have found their way into industries in countries around the world. Ex plosive cladding, welding, forming, compaction and consolidation, cutting, and hardening, in addition to high energy-rate deformation processes using other energy sources, are some of the topics of contemporary technological importance. Metallurgical effects are of the utmost importance in both the scientific understanding of the phenomena involved, and in the successful development and utilization of the associated applications. The international conference upon which this book is based had as its major objectives the acceleration of progress in the field of high-strain rate deformation and fabrication, including applications, by providing a forum for the exchange of state-of-the art information on the metallurgical effects of high strain-rate deformation and fabrication; and the organization of this informa tion into a timely and coherent body of knowledge focused around significant areas and applications. This volume is a manifestation of these objectives. In addition, the contents of this book were organized to provide for a somewhat logical perspective of the fundamentals, development, and state-of-the-art applications of high strain-rate and shock phenomena.
Download or read book Mechanical Behavior of Metals at Extremely High Strain Rates written by Jaroslav Buchar and published by . This book was released on 1986 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of High Strain Rates on the Flow Stress and Defect Structure of Metals written by J. D. Boyd and published by . This book was released on 1969 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this program has been to elucidate the fundamental mechanisms of high-rate plastic deformation of metals. Single crystal specimens of an fcc metal (Cu) and a bcc metal (Nb) were deformed; the macroscopic yielding behavior was noted for each material as a function of strain rate, and the structures of the deformed crystals were studied by metallographic techniques. In addition to the single-crystal work, a study was made of the character of slip bands in polycrystalline iron and a mild steel as a function of temperature. This permitted comparisons to be made between the behavior of different bcc metals. (Author).
