Bożena Szczucka-Lasota | Silesian University of Technology (original) (raw)

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Papers by Bożena Szczucka-Lasota

Transport Problems/Problemy Transportu, Jun 30, 2024

DOCOL 1100M WELDING IN THE CONSTRUCTION OF ELECTRIC MEANS OF TRANSPORT Summary. Advanced high-str... more DOCOL 1100M WELDING IN THE CONSTRUCTION OF ELECTRIC MEANS OF TRANSPORT Summary. Advanced high-strength steels are important for the automotive sector. Metal active gas (MAG) is the most popular method for joining grades of steel. The goal of the paper is to analyze the mechanical properties of the MAG welding joint made of highstrength DOCOL 1100M intended for the construction of electric vehicles. The manuscript shows a basic understanding of the properties of DOCOL joints. This type of material is characterized by a martensitic microstructure, which makes it difficult to make a proper joint. The tensile strength, metallographic structure, and type of non-metallic inclusions were analyzed as a function of the oxygen amount in the protective gas mixture. Investigations of oxide non-metallic inclusions were carried out using scanning electron microscopy. This article attempts to obtain high joint strength of the electric vehicle structure by controlling the average size of non-metallic inclusions in the weld, which is influenced by shielding gas in the MAG welding process. The solution has application potential for the automotive industry, especially for electric vehicles.

Transport Problems/Problemy Transportu, Mar 30, 2024

This paper focuses on the technical problem of repairing the main operating elements of heavy veh... more This paper focuses on the technical problem of repairing the main operating elements of heavy vehicles (semitrailers, dumps, and drums). If these vehicles are in service, significant changes in work schedules can occur, and costs can be generated immediately. Therefore, using the correct technology for repairs is crucial to minimizing financial and logistic difficulties. The article aims to analyze the mechanical properties of an MMA (Manual Metal Arc) welding (covered electrodes) joint made of Hardox 450 steel. This kind of material has a martensitic microstructure, which is difficult to weld because of changes in the components to the other ones during the joint process. Other inconveniences are related to the different chemical composition of steel and covered electrodes, their mechanical resistance, and thermodynamic conditions (consisting of the pre-heating temperature and the cross-pass temperature). Therefore, the joint quality should be determined using a few methods. In this case, NDT (magnetic and radiographic tests) and DT (microstructural analysis and static as well as fatigue tests) were used. All obtained results have enabled the proposed guides for the MMA welding of the steel grade. This is indicated as follows: (1) the method of bevelling the sheets before welding should be used, (2) pre-heating is necessary at temperature levels of 100 C and 125 C, and (3) the recommended interstitial temperature is between 170 C and 200°C.

Zeszyty Naukowe - Politechnika Śląska. Transport/Scientific Journal of Silesian University of Technology. Series Transport, Mar 1, 2024

Zeszyty Naukowe - Politechnika Śląska. Organizacja i Zarządzanie, 2023

Scientific Journal of Silesian University of Technology. Series Transport, Sep 1, 2021

Various types of structures and materials play an important role in the creation modern means of ... more Various types of structures and materials play an important role in the creation modern means of transport, including various grades of steel with different mechanical properties. For the rolling stock, proper operation and meeting the operational conditions is very important. Welded structures play an important role in the construction of various means of transport. Correct welding of carriages is important both in production and when carrying out various types of repairs. Each repair a carriage depends on its advancement and condition and the time of its operation. Each inspection for a refurbished carriage is defined either by the service life or the big distance traveled by the carriage. Important factor that may lead to damage is the effect of the load transported in the carriage. Therefore, the causes of the wear of the rolling stock are investigated and measures are taken to prevent any

Aparatura Badawcza i Dydaktyczna, 2019

Scientific Journal of Silesian University of Technology. Series Transport, Jun 1, 2023

The exhaust valve seat face is a surface that degrades slowly as a result of mechanical and therm... more The exhaust valve seat face is a surface that degrades slowly as a result of mechanical and thermal stresses. There is extensive research on new materials for valves and for the improvement of valve production technology. This paper discusses the method of obtaining a filler metal made of Fe3Al intermetallic phase and the method of TIG hard-facing on a valve seating face made of H9S2 steel, evaluating the effects of essential hard-facing parameters. The resulting hardfacing build up was assessed in terms of quality using industrial radiography testing (RT).

Smart cities, Apr 13, 2023

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Transport Problems, 2020

The paper presents the possibilities of using light alloy components in vehicle construction. Mat... more The paper presents the possibilities of using light alloy components in vehicle construction. Material 6082 was chosen for use in responsible structural components. The structure and strength parameters of the material in the delivery state were tested. Tested material parameters were compared with normative requirements. The purpose of the paper is to check the mechanical properties of aluminum alloy welded joints by various processes and parameters. Until now, welding of 6082 alloy did not give good and repeatable results. Because of that, two welding methods were analyzed (MIG and TIG) in the field of the quality of welds, strength of welded joints, and material structures obtained as a result of welding with various parameters.

Kompozyty, 2002

The article presents the structure and phase composition of composite powders with the nickel-chr... more The article presents the structure and phase composition of composite powders with the nickel-chromium matrix and dispersion strengthening phases. The composite powders were obtained in the activated self-propagating high temperature synthesis. The complex phase composition of powders confirms an appropriate selection of technological parameters of SHS process. STRUKTURA KOMPOZYTOWYCH PROSZKÓW Z OSNOWĄ NiCr, FAZĄ FeAl, WĘGLIKAMI I TLENKIEM GLINU Przedstawiono strukturę kompozytowych proszków o osnowie NiCr z wprowadzoną fazą FeAl, węglikami chromu i tytanu oraz tlenkami aluminium. Proszki o złożonym składzie fazowym wytwarzano w procesie aktywowanej syntezy wysokotemperaturowej ASHS. Określona została procedura technologiczna wytwarzania takich proszków. Strukturę proszków analizowano metodami mikroskopii optycznej i skaningowej. Skład fazowy i chemiczny proszków określono metodami rentgenowskimi X-ray i EDX. Proszki charakteryzują się dyspersyjną strukturą (rys. 1). Wyniki badań składu fazowego proszków przedstawione na rysunkach 2-7 potwierdziły przyjęte założenia ich składu fazowego oraz właściwie dobrane parametry technologiczne syntezy. Wytworzone proszki są przeznaczone do natrysku cieplnego powłok. 1 dr inż., 2 dr inż., 3 mgr inż.

Ochrona przed Korozją, 2010

Transport Problems, Jun 30, 2023

In the structure of crane bumpers, there is a need to join various types of steel. Usually, low-a... more In the structure of crane bumpers, there is a need to join various types of steel. Usually, low-alloy steel structures are used for this purpose, which can be represented by S355J2 steel. The tensile strength of S355J2 low-alloy steel is slightly below 600 MPa, and the tensile strength of S355J2 steel is at the high level of 200 J at ambient temperature. The impact strength of this steel in negative temperatures is also good at over 47 J at-60 °C, so it meets the 6th class of impact toughness. Welding structures, after classic gas metal arc welding (GMAW) processes, meet only the second impact toughness class. An improved GMAW process was used by micro-jet cooling application to raise the mechanical properties of the joints. The microstructure and main properties of the joints were carefully analyzed. The influence of using the new suggested welding process on the various properties of the welds is presented (UTSultimate tensile strength, YSyield strength, Poisson ratio, elongation, Young's modulus). Then, the effects of tests for use in crane bumper construction were checked by using a hybrid finite element method (FEM) analysis.

Transport Problems, Sep 30, 2022

Advanced high-strength steel (AHSS) is being used increasingly often in the structure of means of... more Advanced high-strength steel (AHSS) is being used increasingly often in the structure of means of transport. Welds made of these steels can crack in the heat-affected zone (HAZ) and have inferior mechanical properties compared to the base material. The goal of this paper was to solve the technological and material problem of obtaining highstrength thin-walled welded structures of AHSS steel designed for heavily loaded elements of transport means. The novelty of the article is its presentation of a modified welding process which enables a high-strength structure of the obtained joint to be obtained without welding defects and incompatibilities. Copper backing was selected as an effective method of heat dissipation in the process, and, using the basic solutions method, the leverage of a heat flow process in the weld method deposit (WMD) was checked after cooling down the substrate. The fundamental solutions method was used to determine the optimal shape of the backing. It has been shown that the new backing affects the structure and mechanical properties of welds. In order to verify the newly developed method, tensile tests of the obtained joint were carried out, the hardness was assessed, the metallographic structure was analyzed, and non-destructive tests were performed. The developed material and technological solution were used, for example, for the construction of the arm element of the mobile platform.

Zeszyty Naukowe. Organizacja i Zarządzanie / Politechnika Śląska, 2018