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پزشکی، دندانپزشکی و داروسازی
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محصولات
High temperature strain of metals and alloys: physical fundamentals - Original PDF
نویسندگان: خلاصه: Creep and fatigue are the most prevalent causes of rupture in superalloys, which are important materials for industrial usage, e.g. in engines and turbine blades in aerospace or in energy producing industries. As temperature increases, atom mobility becomes appreciable, affecting a number of metal and alloy properties. It is thus vital to find new characterization methods that allow an understanding of the fundamental physics of creep in these materials as well as in pure metals. Here, the author shows how new in situ X-ray investigations and transmission electron microscope studies lead to novel explanations of high-temperature deformation and creep in pure metals, solid solutions and superalloys. This unique approach is the first to find unequivocal and quantitative expressions for the macroscopic deformation rate by means of three groups of parameters: substructural characteristics, physical material constants and external conditions. Creep strength of the studied up-to-date single crystal superalloys is greatly increased over conventional polycrystalline superalloys. From the contents: - Macroscopic characteristics of strain at high temperatures - Experimental equipment and technique of in situ X-ray investigations - Experimental data and structural parameters in deformed metals - Subboundaries as dislocation sources and obstacles - The physical mechanism of creep and the quantitative structural model - Simulation of the parameters evolution - System of differential equations - High-temperature deformation of industrial superalloys - Single crystals of superalloys - Effect of composition, orientation and temperature on properties - Creep of some refractory metals For materials scientists, solid state physicists, solid state chemists, researchers and practitioners from industry sectors including metallurgical, mechanical, chemical and structural engineers.
Phase Transformations of Elements Under High Pressure - Original PDF
نویسندگان: خلاصه: The study of transformations of materials under high pressures promises to yield modifications with important applications in materials science and other fields including, by way of example, the dense metallic modification of hydrogen possessing extremely high superconducting properties. This work presents recent theoretical and experimental information gathered on phase diagrams of 96 elements. Data is presented on first- and second-phase transitions, melting lines, crystal structures of the stable and metastable phases, important phase properties such as the Curie and Neel temperature, and the superconducting temperature. Information is provided on elements' liquid state, amorphization, and metallization. Temperature-pressure diagrams are given for most of the elements.
Mossbauer analysis of the atomic and magnetic structure of alloys - Original PDF
نویسندگان: خلاصه: The monograph indicates the key problems that have to be solved for the further development of the Mossbauer methods for analysis of the nuclear and magnetic structure of alloys, and offer solution variants for some of these problems based on the generalised results of a wide range of theoretical and experimental investigations, including original work by the author of the book and his colleagues.
Salesforce for Beginners: A step-by-step guide to creating, managing, and automating sales and marketing processes (2nd Edition) - Epub + Converted Pdf
نویسندگان: خلاصه: Salesforce for Beginners: A step-by-step guide to creating, managing, and automating sales and marketing processes (2nd Edition) - Epub + Converted Pdf Sharif Shaalan Timothy Royer
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