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Purpose: The work presents the application of the Finite Elements Method in a computer simulation whose aim is to determine the properties of PVD and CVD coatings on various substrates and to optimise parameters of a laser surface treatment process of surface layers of tool steels. Design/methodology/approach: The article discusses the application of the finite elements method for simulating the determination...
The main aim of the experiment was to determine in the laboratory conditions forces acting on the hoe coulter. The measurements were carried out on an abrasive test unit type "rotating bowl" unit using designed and built measuring system. The velocity of the coulter was in the range of 1,11 to 2,22 m·s-1, and the depth of penetration into the river sand was 40 or 60 mm. On the basis of the...
Purpose: The aim of the research is the computer simulation of the internal stresses in bilayer coatings Ti+TiN and Ti+Ti(C,N) obtained in the magnetron PVD process on the sintered high-speed steel of PM HS6-5-3-8 in working atmosphere including 100% N2, and 50%N250%CH4. Design/methodology/approach: The experimental values of stresses were determined basing on the X-ray diffraction patterns using...
This work concerns a new criterion for hot-tearing evaluation in castings. Algorithm describing the conduction of computer simulations of phenomena accompanying the casting formation, which performing is the preparation stage for using of this criterion, is also described. According to the low recurrence of phenomena occurring during solidification (e.g. grained structure parameters, stresses distribution)...
A model based on the description of physical phenomena occuring in a material while being deformed and during a break of the deformation. It has been assumed in the model that it there are known the parts of areas of the materials undergoing strengthening or weakening, then the yield stress of the whole material can be recognized as a sum of the parts of the yield stresses derived from those areas.
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