Investigations on the Dynamic Plasticity of Metal Single Crystals PDF Download

Author: Fritz Zwicky (Astrophysicist, Switzerland, United States)
Publisher:
ISBN:
Category :
Languages : en
Pages : 22

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Author: Defense Documentation Center (U.S.)
Publisher:
ISBN:
Category : Industrial arts
Languages : en
Pages : 922

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 6

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The principal objective of the research on this project has been to develop improved understanding of the plastic response of metals at strain rates of 100000 1/s and higher. This objective has been pursued primarily by the development of a strain-rate change test for probing the plastic response of a metal being sheared at strain rates of 105 1/s to 106 1/s in a pressure-shear plate impact experiment. Such a test makes it possible to distinguish between the rate sensitivity of the flow stress at fixed dislocation structure, and the rate sensitivity of strain hardening. These effects cannot be distinguished in the usual tests at constant strain rates. A second objective arises form the main result of the research on the principal objective; namely, that the rate sensitivity at high strain rates is associated primarily with the rate sensitivity of strain hardening. Consequently, improved understanding of strain hardening takes on greater importance and had been addressed as a second objective. Quasi-static compression tests have been conducted on aluminum single crystals to clarify the interaction between slip on one slip system and hardening on another. Such clarification is required to allow the development of reliable models for plastic flow based on slip on multiple slip systems.

Author: Vladimir Boyko
Publisher: Springer Science & Business Media
ISBN: 9780883188699
Category : Science
Languages : en
Pages : 328

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Market: Research scientists and students in materials science, physical metallurgy, and solid state physics. This detailed monograph presents the theory of reversible plasticity as a new direction of development in crystal physics. It features a unique integration of traditional concepts and new studies of high- temperature superconductors, plus in-depth analyses of various related phenomena. Among the topics discussed are elastic twinning (discovered by Dr. Garber), thermoelastic martensite transformation, superelasticity, shape memory effects, the domain structure of ferroelastics, and elastic aftereffect. Partial Contents: 1. Transformation of Dislocations. Dislocation Description of a Phase Transformation Front. 2. Dislocation Theory of Elastic Twinning. Twinning of Crystals: Principal Definitions. 3. Statics and Dynamics of Elastic Twinning. Discovery of Elastic Twinning. Verification of the Validity of the Static Theory in a Description of the Macroscopic Behavior of an Elastic Twin. 4. Thermoelastic Martensitic Transformation. Martensitic Transformation: a Diffusionless Process of Rebuilding the Crystal Lattice. 5. Superelasticity and the Shape Memory Effect. Main Characteristics of Superelasticity and Shape Memory Effects. 6. Reversible Plasticity of Ferroelastics. Ferroelastics: Main Definitions. 7. Investigation of Reversible Plasticity of Crystals by the Acoustic Emission Method. Emission of Sound by Moving Dislocations andTheir Pileups. Methods Used in Experimental Investigations of the Acoustic Emission Generated by a SingleTwin. Acoustic Emission Associated with Elastic Twinning. 8. Influence of Reversible Plasticity of Superconductors on Their Physical Properties. Reversible Changes in the Parameters of Traditional Superconductors under the Action of Elastic Stresses. Influence of Magnetic Fields on Reversible Changes in the Parameters

Author: Wojciech Truszkowski
Publisher: Springer Science & Business Media
ISBN: 9401596921
Category : Science
Languages : en
Pages : 156

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The reader shall find in the offered monograph a systematic presentation of scientific effects in the field of anisotropy studies reached by the author and his collaborators in the period of recent four decades: published and discussed in a number of papers and conference contributions. The central construction line of discussion is to be sought in the full and comprehensive analysis of ret:) function defining the anisotropy coefficient varying during the tensile test. No doubt, this function can be considered as a nutshell carrier ofcomprehensive information about the essential features influencing the directionality of the studied material's plasticity. The function also provides the basis to elaborate methods used in the determination of such characteristics. In the historical presentation of literature in the field of plastic anisotropy, the original input was offered by W.M. Baldwin Jr., already in 1946, who observed the differentiated strain rates in three mutually perpendicular directions of the sample subjected to static tensile test. In the following years, further and expanded analysis of the problem was undertaken by Lankford, Hill, Gensamer, Jackson, Low and Smith.

Author:
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ISBN:
Category : Military research
Languages : en
Pages : 746

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Author: Kyle James Michael Ramos
Publisher:
ISBN:
Category : Deformations (Mechanics)
Languages : en
Pages : 196

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Author:
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ISBN:
Category : Engineering
Languages : en
Pages : 618

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Author: Franz Roters
Publisher: John Wiley & Sons
ISBN: 3527642099
Category : Technology & Engineering
Languages : en
Pages : 188

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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.

Author: Louis Gold
Publisher:
ISBN:
Category : Crystallography
Languages : en
Pages : 322

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