Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Bartek Wierzba"'
Publikováno v:
Tehnički Vjesnik, Vol 28, Iss 2, Pp 540-547 (2021)
The lifetime of the elements made of Ni-base superalloys can be strongly increased by introducing compressive stresses. Such stresses increase the resistance of cracks nucleation and formation during cyclic loads. Therefore, it is important to know h
Externí odkaz:
https://doaj.org/article/3bc324a62986450bbaf782dcf9f1f716
Autor:
Ryszard Filip, Kamil Ochał, Kamil Gancarczyk, Wojciech Jerzy Nowak, Barbara Kościelniak, Bartek Wierzba
Publikováno v:
Materials, Vol 14, Iss 15, p 4269 (2021)
In the present work, Pyrowear53 steel was subjected to the impulse carburizing LPC process. After carburation, the material was quenched and tempered. Postprocessing analyses included the measurement of hardness, carbon content, residual austenite, a
Externí odkaz:
https://doaj.org/article/f4047eaa9bb244e5b09adeb9b8d8623c
Publikováno v:
Materials, Vol 13, Iss 16, p 3529 (2020)
The influence of surface roughness on its high temperature oxidation for an Ni-base superalloy was studied using laser profilometry, atomic force microscopy, mass change measurements, glow-discharge optical emission spectrometry, scanning electron mi
Externí odkaz:
https://doaj.org/article/cd425f0b39a341ac9b848c663c195f39
Publikováno v:
Journal of Manufacturing and Materials Processing, Vol 4, Iss 1, p 15 (2020)
The Ni-base superalloys facing high temperature require further protection against high temperature oxidation. One of the most common methods providing high temperature oxidation resistance is the production of aluminide layers (NiAl-coatings). It is
Externí odkaz:
https://doaj.org/article/01b2eb03d9fc4857a95aae792e4779d6
Publikováno v:
Metals, Vol 9, Iss 7, p 782 (2019)
In the present work, it is shown that the surface preparation method used on two Ni-based superalloys prior to aluminizing chemical vapor deposition (CVD) is one of the most important factors determining the oxidation resistance of aluminized Ni-base
Externí odkaz:
https://doaj.org/article/10ea03ac6708451c927e629733936f1f
Autor:
Bartek Wierzba, Wojciech J. Nowak
Publikováno v:
Materials, Vol 11, Iss 7, p 1065 (2018)
In this paper, the morphology evolution in a Bi–Sb system under the centrifugal force at room temperature is discussed. The rotation speed was 35,000 rotations per minute and the length of the arm (radii) was 88 mm. It is shown, that after the cent
Externí odkaz:
https://doaj.org/article/ebd4dbe943714540bbbe79b06c8da1e1
Publikováno v:
Journal of Mining and Metallurgy. Section B: Metallurgy, Vol 57, Iss 1, Pp 137-144 (2021)
In this paper, the reactive diffusion in Ni80C20r?Ti ternary system is discussed at 1173K. The diffusion couple was prepared and annealed for 100 h. The two intermetallic phases and two two-phase zones occurred, namely: Ti2Ni, TiNi, TiNi+Cr, and TiNi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4289053ab0c2d983fcd68907bde1dfaf
https://doi.org/10.2298/jmmb200311008w
https://doi.org/10.2298/jmmb200311008w
Publikováno v:
Metallurgical and Materials Transactions A. 51:6584-6591
The aim of the research was to investigate the microstructural changes caused by diffusion through interface between α and β titanium solid solutions. For this purpose, a diffusion couple composed of two single-phase titanium alloys—α type comme
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8517edf2ac41e37a513a19e6940389a
https://doi.org/10.1007/s11661-020-06023-5
https://doi.org/10.1007/s11661-020-06023-5
Publikováno v:
Advances in Manufacturing Science and Technology. 44:1-8
In this article, the fundamental questions concerning the diffusion path, in particular, what is the shape of diffusion path in ternary systems and how to approximate it from the initial concentration profile, will be answered. The new rules were fou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a4c9ae23e5c8b439bed8a75ba90adeb
https://doi.org/10.2478/amst-2019-0002
https://doi.org/10.2478/amst-2019-0002
Publikováno v:
Journal of Mining and Metallurgy. Section B: Metallurgy, Vol 56, Iss 3, Pp 353-360 (2020)
In the present work, a performance of ASTM A439 Austenitic Ductile Iron type D5S at high temperature in the oxidizing environment was investigated. The obtained results revealed that exposure at temperatures 800?C, 850?C, and 900?C resulted in relati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d66da63d44b060864974ffccbb59c237
http://www.doiserbia.nb.rs/img/doi/1450-5339/2020/1450-53392000028N.pdf
http://www.doiserbia.nb.rs/img/doi/1450-5339/2020/1450-53392000028N.pdf