. Trško, L., Nový, F., Bokůvka, O., Jambor, M., 2018. Ultrasonic Fatigue Testing in the Tension-Compression Mode . J. Vis. Exp. (133), e57007, doi:10.3791/57007 (2018). Ulewicz, R., Mazur, M., 2013. Fatigue testing structuralsteel as a factor of safety of technical facilities maintenance . Prod. Eng. Arch. 1/1, 32–34. https://doi.org/10.30657/pea.2013.01.10 Ulewicz, R., Szataniak, P., Novy, F., 2014. Fatigue properties of wear resistant martensitic steel , in: METAL 2014 - 23rd International Conference on Metallurgy and Materials, Conference Proceedings. pp. 784–789.
There is a problem in obtaining a suitable impact strength of the padding weld after cladding with a martensitic filler metal. Too low annealing temperature below 580°C and the excessive annealing temperature above 650°C do not provide adequate impact strength of the padding weld. A heat treatment technology for mixed joints has been developed based on the results of the microscopic observations, X-ray diffraction measurements and transmission electron microscope examination. The problem was identified and a special technology of heat treatment for the dissimilar joint was elaborated. This technology provides a high impact resistance of the padding weld and an appropriate properties of the base material.
-Metallic Inclusions on The Fatigue Strength of StructuralSteel. Archives of Metallurgy and Materials 60 (1) (2015) 65-69. 8. Wołczyński W., Guzik E. Wajda W. Jedrzejczyk D. Kania B., Kostrzewa M.: Cet In Solidifying Roll – Thermal Gradient Field Analysis. Archives of Metallurgy and Materials 57 (2012) 105-117. 9. Ulewicz R., Novy F., Selejdak J. Fatigue Strength of Ductile Iron in Ultra-High Cycle Regime. Advanced Materials Research 874 (2014) 43-48. 10. Roiko A., Hänninen H., Vuorikari H.: Anisotropic distribution of non-metallic inclusions in a forged steel roll and its
Plasma Nitriding as a Prevention Method Against Hydrogen Degradation of Steel
Aim of this paper is evaluation of susceptibility of plasma nitrided structural steel to hydrogen absorption and degradation. Structural steel, nitrided at glow discharge in the gas mixture of various N2, H2, Ar content was subjected to cathodic hydrogen charging in acid solution simulating the aged engine oil. The effect of the nitrided layers on the hydrogen transport and on the irreversible trapping was evaluated by the measurements of the hydrogen permeation rate and by the vacuum extraction, respectively. Surfaces with modified layers were examined with the use of a scanning electron microscope (SEM) before and after hydrogen permeation tests. In the presence of the not defected compact nitride layer, no hydrogen permeation through the steel has been stated under the experimental conditions. Absorbed hydrogen was accumulated within this layer.
Using the atmosphere of the higher nitrogen to hydrogen ratio at plasma assisted nitriding provides the formation of thin compact nitride zone, highly protective against corrosion and hydrogen degradation.
This article presents the results of an examination of the properties of thermal flame sprayed coatings produced by material in the form of four powders (two polymers: PA11 and PA12 CastoPlast, and two high purity: tin and aluminum) on the substrate of the unalloyed structural steel of S235JR grade. Investigations of coating properties are based on metallography tests (SEM and CLSM), measurement of microhardness (acc. to PN-EN ISO 6507-1:2007), anticorrosive (acc. to PN-EN ISO 9227:2017-06) and bend testing. Results demonstrate properties of flame sprayed coatings that are especially promising in the industrial applications where corrosion-resistant coating properties are required. Consequently, performed experiments show that the highest corrosion resistance is demonstrated by steel samples with a polyamide anti-corrosion system. Accelerated corrosion tests showed the lowest corrosion resistance of the tin coating system, however, they do not fully correspond to the corrosion processes in operating conditions.
The article presents the results of the study on exploitation properties of flame sprayed ceramic coatings produced by oxide ceramic material in the form of powder on the aluminum oxide Al2O3 matrix with 3% titanium oxide TiO2 addition and also on the zirconium oxide (ZrO2) matrix with 30% calcium oxide (CaO) on the substrate of unalloyed structural steel of S235JR grade. As a primer powder, metallic powder on the base of Ni-Al-Mo has been applied. Plates with dimensions of 5×200×300 mm and also front surfaces of ∅40×50 mm cylinders have been flame sprayed. Spraying of primer coating has been done using RotoTec 80 torch and external specific coating has been done with CastoDyn DS 8000 torch. Investigations of coating properties are based on metallography tests, phase composition research, measurement of microhardness, coating adhesion to the ground research (acc. to EN 582:1996 standard), abrasive wear resistance (acc. to ASTM G65 standard) and erosion wear resistance (acc. to ASTM G76-95 standard) and thermal stroke study. Performed tests have shown that the flame spraying with 97%Al2O3 powder containing 3% TiO2 and also by the powder based on zirconium oxide (ZrO2) containing 30% calcium oxide (CaO) performed in a wide range of technological parameters allow to obtain high quality ceramic coatings with thickness up to ca. 500 μm on a steel substrate. The primer coating sprayed with the Ni-Al-Mo powder to the steel substrate and external coatings sprayed has the of mechanical bonding character. The coatings are characterized by high adhesion to the substrate and also high erosion and abrasive wear resistance and the resistance for cyclic thermal stroke.
Marine Research 2 (2013) 67-73. 9. ASM Handbook Volume 01: Properties and Selection: Irons, Steels, and High-Performance Alloys. ASM International. 1990 10. EN 10025-6 Hot rolled products of structuralsteels - Technical delivery conditions for flat products of high yield strength structuralsteels in the quenched and tempered condition. 11. EN 10216-2 Seamless steel tubes for pressure purposes - Technical delivery conditions - Nonalloy and alloy steel tubes with specified elevated temperature properties 12. PN-EN ISO 4063 Welding and allied processes - Nomenclature of
-195. J. P. Hirth, Effects of hydrogen on the properties of iron and steel, Metallurgical Transactions A , 11A (1980) 861-890. S.P. Lynch, A commentary on mechanisms of environmentally assisted cracking, Second Int. Conf. on "Corrosion-Deformation Interactions CDI'96" Nice, France, The Institute of Materials (1996) 206-219. PN-EN 10137-2:2000 Plates and wide flats made of high yield strength structuralsteels in the quenched and tempered or precipitation hardened conditions - Delivery conditions for quenched and tempered steels. PN-EN 10002-1:2004 Metallic materials
Compressed Sensing. Sensors, 17 (2017), 608; doi:10.3390/s17030608 7. Stegemann R., Cabeza S., Lyamkina V., Brunoa G., Pittner A., Wimpory R., Boin M., Kreutzbruck M., Residual stress characterization of steel TIG welds by neutron diffraction and by residual magnetic stray field mappings. Journal of Magnetism and Magnetic Materials 426 (2017) 580–587. 8. Haihong Huang and Zhengchun Qian, Effect of Temperature and Stress on Residual Magnetic Signals in Ferromagnetic StructuralSteel. IEEE Transactions On Magnetics, 53(1) (2017). 9. Haihong Huang, Zhengchun Qian, Cheng Yang