Deformation Behavior of Alloys Under Conditions of Pressure Treatment

Major: Materials Science
Code of subject: 6.132.01.E.045
Credits: 6.00
Department: Department of Materials Science and Engineering
Lecturer: PhD, Associate Professor Alexei Bilous
Semester: 5 семестр
Mode of study: денна
Learning outcomes: As a result of studying the discipline, the specialist should know: the physical foundations of plastic deformation; influence of temperature-speed conditions of pressure treatment on the plasticity of metallic materials; technological bases of obtaining billets by methods of rolling, free forging, hot and bulk stamping, cold sheet punching, pressing, drawing, stamping an explosion; tool and equipment used in pressure treatment; Physico-chemical characteristics of lubricating and cooling liquids used in conditions of pressure treatment. The trained specialist should be able: to make a choice of technological processes of pressure treatment taking into account the properties of the material of the workpiece; to calculate the optimal technological processes of obtaining billets by methods of free forging, hot-blast stamping, cold sheet punching, calculating efforts at pressure treatment, selecting equipment for processing; to control the quality of workpieces, to analyze the causes of the appearance of various types of defects in the treatment of pressure, to submit recommendations for its elimination.
Required prior and related subjects: General chemistry Higher mathematics Engineering graphics Strength of Materials Physics Computer Science
Summary of the subject: The role of pressure treatment in ensuring the quality and efficiency of machine building products General principles of the deformation process of solids. Resistance to deformation. The forces of deformation. Cold plastic deformation of single crystals. Deformation by double Deformation by sliding. Tension and plastic deformation. Boundaries of flow of a single crystal. Defects of crystalline lattice and their classification. The role of point, linear, surface and bulk defects of a crystalline lattice in the processes of hot, cold plastic deformations. The velocity of dislocation movement during plastic deformation. Influence of stresses on the velocity of dislocation motion under deformation. Deformation of polycrystals. Thermal effects during deformation, adiabatic, isothermal and polytropical effects during deformation. Changes in volume, density, electro - and heat conductivity of metal in the process of deformation. Strengthening with cold deformation. Strength curves. Limit deformation of metal. Influence of temperature and deformation rate on deformation process. Deformation at elevated temperatures; return and dynamic recrystallization. Types of deformation in the treatment of pressure. Influence of temperature on resistance to deformation and plasticity. Hot deformation and metal properties. Constant volume condition. Degree of deformation and displacement volume. Influence of deformation rate on plasticity and resistance to deformation. Thermomechanical treatment of metals and alloys. High-temperature thermomechanical treatment and its features, NTMO and PTMO of metallic materials. Condition of plasticity, analysis of processes of deformation. Physical content is the plasticity condition. Energy conditions of plasticity. Connection between stresses and deformations during plastic deformation. Deformation schemes. Contact friction when processing metals under pressure. Elements of the theory of friction. Laws and hypotheses of contact friction. Friction coefficient. Methods of determination of deforming forces and deformation work. Dependence of parameters of deformation resistance on the physical and chemical nature of the workpiece material. Influence of technological factors on resistance to deformation of workpieces. Dependence of deformation resistance from processing and structural changes in the material. Influence of the form of the deformed state, temperature, deformation rate. Modeling of deformation processes. Technological processes of metal processing by pressure. Heat the workpiece before the metal is pressurized. Oxidation of metals during heating. Means of heating and heating devices. Ecological problems in the production of workpieces by pressure treatment methods. Kinematics of the process of deformation during tension and compression. Flow of metal during compression. The essence of the process and the method of pressing solid and polycha profiles. Tools and equipment. Characteristics of pressed profiles. Flow of metal during precipitation. The essence of the process and its purpose. Free forging tools and equipment, free forging technology. Flow of metal during extraction, extrusion and dragging. Dependence of the nature of the flow of metal on various factors. Flow of metal during bulk stamping. The essence of hot and cold stamping, scope and technical and economic indicators. Kinematics of sheet stamping process. Materials used in sheet die. Basic operations. Sheet stamping tools and equipment. High-speed methods of plastic deformation. Punching by explosion, electrohydraulic stamping, stamping in an electromagnetic field. Generalization of the basic provisions on plasticity and destruction of metals. Calculation of technological parameters of metal processing by pressure. Obtaining the structure of metals with nano-dimensional parameters under pressure conditions
Assessment methods and criteria: 1. Current control: oral questioning, written reports on laboratory work, abstracts on the topic of individual tasks (20%); 2. Examination control: written-oral form (80%).
Recommended books: 1. Suvorov MS Metal processing by pressure. - M., Higher school, 1980. 2. Semenov E.I. Forging and bulk stamping. - M., Higher school, 1980. 3. Storozhev MV, Popov E. A. Theory of metal processing by pressure. - M., Mechanical Engineering, 1971. 4. Dalsky AM Structural materials technology. - Moscow, Mechanical Engineering, 1977. 5. Kuzin OA, Yatsyuk R.A. "Metallurgy and Thermal Treatment of Metals", Kyiv, Osnova, 2005