Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Marek Opiela"'
Publikováno v:
Advances in Sciences and Technology, Vol 18, Iss 4, Pp 66-75 (2024)
The paper presents the results of research on the influence of the material condition – HSLA steel with Ti and Nb microadditions – on the course of the austenitic transformation. In order to determine the kinetics of phase transformations occur i
Externí odkaz:
https://doaj.org/article/c48ec6db5b2d476c994d33551e6dd297
Autor:
Marek Opiela, Gabriela Fojt-Dymara
Publikováno v:
Advances in Sciences and Technology, Vol 18, Iss 3, Pp 200-213 (2024)
The work presents the results of research on the effect of deformation parameters on hot ductility of high-Mn austenitic steel with niobium and titanium. The investigations were carried out on steel with 0.05% C, 24% Mn, 3.5% Si, 1.5% Al, 0.030% Nb a
Externí odkaz:
https://doaj.org/article/5d192e2cb3ec462cb44da68183235b65
Autor:
Marek Opiela, Gabriela Fojt-Dymara
Publikováno v:
Advances in Sciences and Technology, Vol 17, Iss 3, Pp 19-30 (2023)
The aim of the work was to determine the effect of non-metallic inclusions on the hot ductility of two newly developed high-Mn austenitic steels (27Mn-4Si-2Al and 24Mn-3Si-1.5Al-Ti). For this purpose, a hot tensile test was carried out in the tempera
Externí odkaz:
https://doaj.org/article/4d2cf83f164b48a2b0e1e4af3e7db21b
Autor:
Marek Opiela, Anna Wojtacha
Publikováno v:
Advances in Sciences and Technology, Vol 16, Iss 4, Pp 64-73 (2022)
The paper presents a detailed analysis of the MX-type interstitial phase precipitation process and a thermodynamic analysis of the TixV1-xCyN1-y carbonitride precipitation in austenite. The subject of research analysis was the newly developed HSLA-ty
Externí odkaz:
https://doaj.org/article/64385f4cf4914c9fb5dc72e1b51caf5d
Publikováno v:
Bulletin of the Polish Academy of Sciences: Technical Sciences, Vol 71, Iss 2 (2023)
The paper presents stress-strain characteristics recorded during the four-step compression of axisymmetric samples in the Gleeble thermomechanical simulator. The hot deformability of three steels with Mn concentrations of 3%, 4% and 5% was compared.
Externí odkaz:
https://doaj.org/article/42a53a67f3244929bda155d2ee7fb9dd
Autor:
Anna Wojtacha, Marek Opiela
Publikováno v:
Advances in Sciences and Technology, Vol 15, Iss 4, Pp 72-80 (2021)
The paper presents the results of research on the influence of plastic deformation and cooling conditions on microstructure, hardness and a shape of CCT-diagram (Continuous Cooling Transformations) of newly developed multi-phase steel assigned for di
Externí odkaz:
https://doaj.org/article/415256f932ec42e09a59b35a53243eb2
Autor:
Marek Opiela
Publikováno v:
Advances in Sciences and Technology, Vol 15, Iss 2, Pp 90-100 (2021)
The paper presents the results of thermodynamic analysis of precipitation process of MX-type interstitial phases in austenite. The subject of the investigation were two newly developed high strength low alloy microalloyed steels with similar concentr
Externí odkaz:
https://doaj.org/article/f216d2dc10da42cd8a208fccc1bd64fd
Autor:
Anna Wojtacha, Marek Opiela
Publikováno v:
Advances in Sciences and Technology, Vol 15, Iss 1, Pp 126-133 (2021)
The aim of the work was to determine the diagrams of phase evolution under equilibrium conditions and numerical simulation of austenite phase transformations under non-equilibrium conditions, as well as to determine CCT (Continuous Cooling Transforma
Externí odkaz:
https://doaj.org/article/8e622064e2e34bc7a7ad86f20d720674
Publikováno v:
Advances in Sciences and Technology, Vol 14, Iss 2, Pp 76-84 (2020)
Materials scientists are seeking to produce metals with reduced weight and dimensions while maintaining the appropriate mechanical properties. There are several ways to improve the internal structure of metals, such as the ultrasound used to solidify
Externí odkaz:
https://doaj.org/article/37b61c4cbdec4fd9b94be0ac8f5dfaed
Publikováno v:
Materials, Vol 15, Iss 22, p 8198 (2022)
Tests were carried out on two high-Mn steels: 27Mn-4Si-2Al-Nb with Nb microaddition and 24Mn-3Si-1.5Al-Nb-Ti with Nb and Ti microadditions. High-manganese austenitic steels, due to their good strength and plastic properties belong to the AHSS (Advanc
Externí odkaz:
https://doaj.org/article/d12cc4afcd624456b97d20c1ad4072c9