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The aim of warm sheet metal forming processes is to improve plastic flow of material, as well as to decrease the springback effect. This investigation deals with the effect of temperature in the range from 20 C to 700 C on basic material parameters of stainless steel sheet metal such as yield stress, ultimate strength, total and uniform elongation, strain hardening parameters and plastic anisotropy...
Hydroforming is a cost effective way of shaping various metals and alloys into lightweight, structurally stiff and strong pieces. The largest applications of hydroforming can be found in the automotive and aerospace industries. Among them, exhaust system components such as T-shapes or X-shapes connectors have been often manufactured by tube hydroforming. Typical tube hydroforming operation is made...
The article presents the experimental and numerical results of rectangular cup drawing of DC03 coldrolled steel sheet. The aim of the experimental study was to analyse material behaviour under deformation. The received numerical results were further verified by experimental results. A 3D parametric finite element model was built using the commercial package ABAQUS. If the material and friction anisotropy...
The selected examinations of physical properties of the aluminised steel strips intended for elements of exhaust systems are characterized in the paper. Strips in their initial state and after the heat treatment, at temperatures from 250 to 700 C for 30 to 1440 minutes, were investigated. The macro and microscopic observations of the surface of the coating before and after heating are presented. The...
Accelerated cooling of DP steel strips after hot rolling is considered in the paper. The work is focused on the multi scale model based on the Cellular Automata method as well as on conventional models. Dilatometric tests were performed to identify the coefficients in the models for a DP steel. These models are implemented in the computer system, which simulates controlled cooling of products after...
One of the limitations related with joining several micro parts is the temperature generated during joining methods based on material heating. Temperature concentration could be a reason of severe difficulties with micro-manufacturing applications. It seems that modern mechanical joining technologies could significantly facilitate micro-parts fastening, since there is lack of temperature development...
The paper focuses on hot rolled and fast cooled dual phase (DP) steel strips for automotive application. The analysis carried out in this work includes many tests and experiments such as: dilatometric and plastometric tests, Gleeble simulations of hot rolling process, simulation of strip cooling after rolling and hot rolling of DP steel samples in laboratory conditions. The main part of the paper...
The cycle of investigations on applying tailor welded blanks (TWB) for sheet forming processes was conducted at Department of Materials Technology of the Silesian University of Technology and as The European Research Project Acronym SIM-TWB. The model of tailor welded blank (TWB model) have been worked out and great number of FEM simulations of stamping process of different geometry drawpieces using...
This paper presents the key aspects of the use of thin-walled sections for collision energy absorbing components. The process of deformation of thin-walled structures and the parameters expressing their energy absorption are described in detail. The research on improving the energy absorption of thin-walled sections, through the use of, e.g., tailored blanks, polyurethane foams and mechanical joining...
This paper presents little-known, innovative technology of cold rolling of stepped shafts. The method makes it possible to form and finish-up machine parts in the rolling process, which is associated with strengthening of material due to cold work. The author presents the results of investigations on the influence of the state of stress during cold plastic work on material’s structure and its strength...
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