The article presents the methodology and results of laser surface texturing of the Ti6Al7Nb alloy. treatment was carried out by means of a laser TruMicro 5325c Trumpf with a wavelength of 343 nm and a pulse duration of 6.2 ps. The impact of pulse frequency, scanning speed of a laser beam and laser power on the shape and dimensions of texture was studied. By selecting a suitable shape, size and density of laser texture for the surface of titanium alloys applied in knee replacement it is possible to reduce the coefficient of friction and wear of polyethylene to increase the osseointegration and adhesion of the coatings.

The determination of the material fatigue limit is important with regard to the determination of safe service life of structural materials. Depending on the type of treatment and the type and size of introduced stresses, technological procedures can affect negatively or positively the fatigue properties of steel. Based on literature research and our own research, the article presents the influence of selected technological factors on fatigue properties. Our own studies were performed with the use of load high frequencies of 20 kHz in the ultra-high-cyclic area.

The paper summarizes selected examples from quantitative metallography of engineering materials and indicates potential errors which should be avoided. Problems in the areas of sample preparation (cutting, grinding, polishing and etching), microscopic observation, image collection, image processing, quantitative image analysis together with the interpretation of the results were shortly characterized.

The paper proposes one of the possible methods of image quality improvements. There are materials whose preparation for microstructure observation is difficult and, despite the effort, poor quality images are obtained. Computer image processing techniques allow for image transformation by means of various tools and obtaining much better images, with much more visible details than in the raw image. When it is impossible to prepare the sample better for microscopy observation and microstructural analysis, proper image processing is the only solution to gather information about the tested material.

This paper presents the research results of the influence of selected process parameters on the tensile strength samples obtained according to the ISO 527 standard. Bio-capable polyamide powder PA 2200 was the material used in the process. The research included such parameters as energy density transmitted to the sintered layer, laser power and speed, printing direction and the number of scanning. A computer program based on artificial neural network was used to analyze the research results. The program allowed us to assess the influence of printing parameters on the tensile strength, based on previously made research without the need to prepare samples according to the experimental plane.

Super duplex stainless steels present excellent corrosion resistance of austenite steel and a high mechanical behaviour of ferrite steel. However, performance presented by super duplex stainless steels can be drastically reduced if undesirable phases, such as sigma phase, chi phase, secondary austenite and a lot of rich chromium and carbides precipitate. The purpose of this work was to ascertain how 30-minutes isothermal heat treatments at 530°C and corrosion time effect the relative mass loss and profile roughness parameters of the X2CrNiMoN25-7-4 super duplex stainless steel. The influence of boiling nitric acid on the steel corrosion resistance was investigated using weight loss and roughness parameters.

The article presents innovative solutions for wooden energy-efficient constructions which are characterized by low energy power consumption and a high level of performance that ensures a high level of the functional quality and modern design of building interiors. One of the most commonly used modern wooden construction technology is a wooden prefabrication technology whose advantages determine a high level of building energy efficiency. The article presents achievements of selected manufacturers of wooden energy-efficient houses who use prefabrication technology in the context of building construction and interior innovation.

Project planning is an especially important and difficult part of a project preparation. Errors made at these stages usually cause accumulation of difficulties in the implementation phase, causing for example the need to introduce a number of changes in the schedule or the budget, and may even lead to the failure of the project. This article attempts to outline the characteristics of a selected quality management tool used in the project planning phase. The Product Flow Diagram was presented as one of the elements of product-based planning on the example of a project on developing a prototype system for identifying people.

The paper concerns testing Cu−Mo coatings deposited over carbon steel C45, which were then eroded with a laser beam. The analysis involved the measurement of macrogeometry and microhardness of selected areas after laser treatment. The coatings were deposited by means of an ELFA-541 device and they were laser treated with a Nd:YAG laser, the parameters being variable.

The results of the assessment of visual control (VC) types in 10 enterprises from the Silesian province which operate in the automotive industry were presented in this article. These enterprises specialize in production for the automotive industry and constitute companies from Tier 1 and Tier 2 groups in the supply chain. The meaning of visual control was presented in TPS, research methodology and research results. Importance series were used as the basic tool of data analysis. A comparison of importance series was made for the purpose of stating characteristic relations in the scope of importance of the analyses types of VC.

The article presents specific cases appearing in the design of manufacturing databases. In particular, a decomposition of entity model to the physical data model is presented. Understanding of significant differences between them makes it possible to build such structures of industrial databases that include special cases which occur in them. Different strategies for the transition from hierarchical entities model to targeted database tables are described. Additionally, an overview of problems associated with unary entities is outlined in this document.

The article presents current requirements and the results of fire tests for surface protection systems proposed for rolling stock securing. The influence of coating thickness and the type of filler used on the determined parameters is shown.

In the implementation of specialized services a large attention is paid to the flow of information between cells which determine the proper execution of the task. In engineering services related to dentistry there appears to be a significant discrepancy connected with knowledge awareness. The article presents three areas of knowledge (in the range and possession of the required knowledge) and information flow between the patient, dentist and dental technician. A technical solution to increase the possibilities of obtaining information at the design stage of the restoration has also been proposed, by introducing a system of material selection and engineering techniques in dentistry.

Changes in technology, availability of video casts and the general increase of information and knowledge value result in the advent of educational technology. As the first step toward validation of the effectiveness of e-learning in engineering education, a research on a group of students was carried out. The open-source and free software educational platform Moodle was used to conduct a selected course in the form of blended e-learning. The course was prepared and presented to the students during one semester time period. The effects of learning were verified through knowledge tests and their results were collected for analysis. Students in the test group achieved results equal or even better than other groups, validating the effectiveness of e-learning in engineering education. During the experiment also other positive aspects of e-learning were noted: students appreciated freedom of time and place where they learn and for the teacher high effort connected with course preparation could be rewarded by multiple use of the developed course at a later time.

The paper presents the results ofstudies onthe topography of surgical borers flank after their operation. The studies were carried out on borers made of X39Cr13 martensitic steel, which was subject to heat and surface (plasma nitriding) treatment. Test drilling was performed in beef bones, which were fixed in a vice to ensure appropriate stability, a borer 6 mm in diameter and 160 mm long was used. The studies on the topography of flank comprised studies on roughness, which were carried out by means of a profilographometer designed for 2D and 3D studies on the surface by means of a contact method. The studies were carried out for borers of flank formed by successive drilling cycles

This study presents the findings concerning the effect of remelting on microstructure and selected properties of sintered duplex steel. It was demonstrated that the methods of processing lead to homogenization and elimination of porosity in the surface layer of sinters, which substantially affects their properties (surface roughness, microhardness and resistance to friction wear). It was found that the degree of tribological wear in the steel used in the study depends primarily on the microstructure and phase composition and less on porosity.

This article presents information about the Overall Equipment Effectiveness indicator ‒ a key measure used in the Total Productive Maintenance. The research object has been characterized ‒ test bench, which enables a simultaneous, multiposition calibration, adjustment and verification of single- phase or three- phase electricity meters. In the research part, the analysis of effectiveness of the test bench by means of TPM and Overall Equipment Effectiveness indicators was presented.

The article presents the results of surface topography measurements of the Nd‒Fe‒B type bonded magnetic material before and after the corrosion test in aggressive environments. The roughness of composite materials is closely related to the technological process. The increase in values of surface roughness parameters weakens the corrosion resistance by development of the actual surface and increases the contact surface with corrosive media. The results are a contribution to further work on the selection of appropriate technological parameters ‒ among others enlargement of the bio-polymer content which contributes to the homogenisation of powder composition and thus has a beneficial effect on the resistance of material to an aggressive environment in a long-term use.

In this study, the work of the dentist and the identification of musculoskeletal disorders have been characterized. The analysis and compatibility with literature on the identification of musculoskeletal disorders resulting from professional work of dentists have been presented. The authors assessed the occupational risks associated with static load on the position of the dentist by means of the OWAS method.

The paper discusses and presents a hyperelastic incompressible material described by Zahorski potential. The numerical example comparing effective stresses in a cylinder made of Zahorski and Mooney-Rivlin materials was included. The analysis was made in the ADINA software. Conclusions summarize numerical calculations and demonstrate the differences that suggest the use of Zahorski material for rubber and rubber-like materials subjected to large deformations.