In the field of practical metrology it is extremely important not only accuracy but also the measurement of measuring productivity activities which entail considerable costs. Within this article, was tested the influence of the velocity for measuring of roughness. Test was made in ...

This paper deals with the influence of runner angles on the balanced filling of a three-cavity mould during injection moulding. The main goal of the study is to understand the influence of the angles between the runners and the balanced filling of the three individual par...

Phase transformations are normally studied under standard conditions using dilatometers and very small volumes of material. These conditions are given by historical definitions and do not fully correspond to real-world industrial processes any more. Transformation diagrams are a typical example h...

With increasing demands on product precision and all services, monitoring and analysis of key processes becomes a key issue. This paper presents the issue of monitoring and evaluation of the automotive manufacturing process, where production precision is the main attribute. The objective...

The prior-austenite grain size significantly influences the refinement of the martensitic microstructure and therefore the mechanical, electrical and magnetic properties of a material. The accurate determination of the prioraustenite grain size is therefore very important and is a principal task ...

Polymer composites are materials whose importance and scope of applications are growing continuously. Where permitted by the service conditions, conventional materials tend to be substituted with composites. Another common trend seen today is to minimize or eliminate adverse impacts of manufactur...

Additive manufacturing (AM), also known as 3D printing, enables the creation of complex shapes and structures virtually unattainable by classical production processes. This modern manufacturing technology includes metal additive technologies that are use metal powder for producing prototypes or parts&...

ODS steels are used for their very good mechanical properties at high temperature and low-cost production in comparison with other super alloys (ex. nickel super alloys). The paper describes a new group of Fe-Al Oxide Dispersion Strengthened (ODS) alloys with fine Al2O3 precipitates.&#x...

Fatigue failures were frequently encountered in the pins of radius rods of driving axles of trolleybuses in city of San Francisco. Sufficiently representative stress-time histories for the critical cross section through this part were obtained by measurement carried out during rides with...

TRIP (transformation induced plasticity) steel are modern structural materials which are currently mainly used in an automotive industry. The processing of these steels utilize an effect of transformation induced plasticity resulting in good mechanical properties - high strength (up to 1200 ...

The tools used for milling and grinding can have a limited lifetime due to excessive wear. Their lifetime can be prolonged by application of suitable coatings. Highly wear resistant coatings can be easily applied by means of laser cladding. The goal of this study is to&#x...

42SiCr steel is a middle carbon, low alloyed steel with (in wt. %) 0.4C, 1.3Cr, 0.6Mn and 2Si. In this work, the steel was used in hot rolled state, possessing bainite-based microstructure. In development and optimization of heat and thermo-mechanical treatments, small volumes of&#...

Hastelloy C-276 is commercially used representative of Ni-based superalloys family which is widely applied due to good corrosion and wear resistance. In this work the HVOF sprayed and post heat treated coatings of Hastelloy C-276 are studied. Heat treatment for 116 h at 600 °C...

This paper deals with the correlation of the fatigue tests results obtained on standard and miniature test samples. The aim was to compare the fatigue properties (Wöhler curves) of the samples of 15CH2NMFA steel of different cut off CT/50 test specimens after fracture toughnes...

The paper focus on possibilities of imaging microstructure changes in high strength low-alloyed carbon steel using an in-situ tensile stage placed in scanning electron microscope (SEM). The sample can be observed either in secondary electrons (SE) or by electron backscattered diffraction (EB...

Powders are nowadays used as an input material not only for conventional powder metallurgy technologies, but increasingly also for additive technologies. Powder producers usually limit their description to an average chemical composition and typical particle size. However, the real particle size&...

High strength multiphase TRIP steels are very often used as structural materials, especially in the automotive industry. Due to their ability to absorb energy during the impact, they are used for safety components of the car body. These parts can be produced by a hot stam...

The forging industry seeks ways to improve mechanical properties of forged parts without using costly alloyed steels or complicated and time-consuming post-forge heat treatment. One of the available options is Q&P processing (Quenching and Partitioning) of advanced high-strength martensitic steels...

Description of the procedure and results are given for computer simulations of small punch test (SPT) performed on P92 structural steel. The maximum force calculated using the SPT simulation is about 5% higher than the measured value. The punch displacement at the maximum calculate...

This article is focuses on mechanical properties of hybrid structure, which is loaded, by a heat. The type of hybrid structure is the hybrid structure of polymer concrete in combination with steel and cast iron. There will be presented a basic information about polymer concret...