Prediction of fracture based on an assessment of "damage" of a metal by plastic deformation

Using the hypothesis of damage summation and the linear law the accumulation of such a method is proposed for predicting the fracture with large plastic deformation

Connection between machines durability during operation and the complex of physic-mechanical properties, formed during the production of critical parts

© Published under licence by IOP Publishing Ltd. The paper presents the effect of the processing technological structure on the hardening of metals and alloys by choosing the rational parameters of thermomechanical forming components at various stages of processing. The dependencies that can predict the destruction of the product during operation, depending on the structure oi the resulting metal fabrication are shown

Effect of hot and cold severe deformation by extrusion on the properties of lead and aluminum alloys

© 2015, Pleiades Publishing, Ltd. The study of the effect of severe plastic deformation (SPD) by extrusion shows that the ductility of lead after several cycles of SPD increases significantly (3–4 times) as compared to as-cast samples. An aluminum alloy after this processing is hardened by a factor of 2.3–2.5, with ductility decreasing by 2.5–2.7 times, as compared to the as-delivered state

Systems analysis of process control capabilities for forging accuracy

© 2017 Trans Tech Publications, Switzerland. The significance matrix for the parameters of “material-billet-equipment-process-toolpersonnel- environment” system was compiled using the systems approach to the assurance of forging dimensional accuracy, and the expert analysis revealed the most significant process parameters that affect the accuracy. The application of simulation modeling helped to establish the dependence of forging force on the dimensions of an incoming billet. The paper suggests a solution to increase the accuracy of the sized forgings

Automated design systems for manufacturing processes

© 2015, Allerton Press, Inc. A method of formalizing complex manufacturing processes on the basis of multilevel decomposition is proposed. In this approach, standard elements are identified at each level. Principles for formulating individual matrices and flexibly adjustable algorithmic matrices are outlined

Surface quality assurance of ring gear during precision stamping of gearwheels

© Published under licence by IOP Publishing Ltd. The article highlights the main factors, defining the surface quality of ring gear during hot bulk precision stamping. It offers enhanced techniques of surface quality of stamped ring gear

Technology of manufacturing of multiple core stamp tools by plastic deformation

© Published under licence by IOP Publishing Ltd. This article describes a new method for manufacturing of multiple core stamp tools by plastic deformation. The technique of geometric parameters of connected elements of multiple core tools designing necessary for the production of the proposed technology is developed

Ensuring uniformity of metals and alloys structure by multiple extrusion

© Published under licence by IOP Publishing Ltd. Key parameters influencing the deformation force, intensity of plastic deformation and its distribution at IPDmultipleextrusion are considered, recommendations about a choice of rational parameters are made

Application of multi-agent system for control of parameters of precision stamping process of bevel gears

© Published under licence by IOP Publishing Ltd. The article deals with the possibility of using an intelligent control system for the parameters of the technological process of precision stamping and mechanisms of crank hot-stamping presses

Comparative evaluation of the tribological properties of low-and medium-carbon steels after heat treatment and severe plastic deformation

© 2016 Advance Study Center Co. Ltd.The paper presents the results of a comparative tribological study of structural steels with a carbon content of 0.1% and 0.45%. The following thee conditions are studied: Initial (hot rolled), after heat treatment (improvement) and after improvement with subsequent severe plastic deformation (SPD) processing by equal-channel angular pressing (ECAP). It is established that the materials after different types of processing have different structural states, and demonstrate different shear strength of adhesive bonds and adhesion (molecular) components of the friction coefficient in contact with the tool steel of the R18 type. At the same time, it is revealed that the greatest effect of hardening due to microstructure refinement is observed on the specimens of low-carbon steel. Medium-carbon steel after SPD processing has approximately the same tribological properties as after heat treatment