Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Galya Duncheva"'
Autor:
Jordan Maximov, Galya Duncheva, Angel Anchev, Vladimir Dunchev, Kalin Anastasov, Yaroslav Argirov
Publikováno v:
Applied Sciences, Vol 14, Iss 19, p 9031 (2024)
This study aims to evaluate the influence of lubrication and cooling conditions in the diamond burnishing (DB) process on the surface integrity and fatigue limit of chromium–nickel austenitic stainless steels (CNASSs) and, on this basis, identify a
Externí odkaz:
https://doaj.org/article/733d0371774143fb9aa34ff448c4563c
Autor:
Galya Duncheva, Jordan Maximov, Angel Anchev, Vladimir Dunchev, Kalin Anastasov, Yaroslav Argirov
Publikováno v:
Metals, Vol 14, Iss 6, p 710 (2024)
The new slide roller burnishing (SRB) method has been developed to produce mirror-like surfaces. Unlike conventional roller burnishing (RB), SRB is implemented through a unique device that allows the axes of the deforming roller and the rotary workpi
Externí odkaz:
https://doaj.org/article/1c44ebf0e0074024aec43b4b8eaef08a
Autor:
Jordan Maximov, Galya Duncheva
Publikováno v:
Machines, Vol 12, Iss 5, p 312 (2024)
When placed under cryogenic temperatures (below −180 °C), metallic materials undergo structural changes that can improve their service life. This process, known as cryogenic treatment (CrT), has received extensive research attention over the past
Externí odkaz:
https://doaj.org/article/858225a2a14b4ab1bd13434eb83ffa5e
Publikováno v:
Metals, Vol 14, Iss 3, p 303 (2024)
Fastener holes are among the most common natural stress concentrators in metal structures. The life cycles of various structural elements, such as those in aircraft structures, automobiles, and rail-end bolt joints, are limited by fatigue damage arou
Externí odkaz:
https://doaj.org/article/4ee50ff8f9a54e9db46eb7270c26c269
Publikováno v:
Applied Sciences, Vol 14, Iss 3, p 1020 (2024)
Chromium–nickel austenitic stainless steels are widely used due to their high corrosion resistance, good weldability and deformability. To some extent, their application is limited by their mechanical characteristics. As a result of their austeniti
Externí odkaz:
https://doaj.org/article/5cd101eea9b349e392a841f3168ed615
Autor:
Jordan Maximov, Galya Duncheva, Angel Anchev, Vladimir Dunchev, Kalin Anastasov, Petya Daskalova
Publikováno v:
Machines, Vol 12, Iss 1, p 51 (2024)
The article presents a new method called slide roller burnishing (SRB) for the cold working of cylindrical surfaces on machine tools implemented with a novel multi-functional device. The machined material is chromium–nickel austenitic stainless ste
Externí odkaz:
https://doaj.org/article/74b6aa656c654994adba6fdf0ca8c2f4
Autor:
Jordan Maximov, Galya Duncheva, Angel Anchev, Vladimir Dunchev, Vladimir Todorov, Yaroslav Argirov
Publikováno v:
Metals, Vol 13, Iss 12, p 1930 (2023)
Aluminium bronzes possess a unique combination of high strength and wear and corrosion resistance in aggressive environments; thus, these alloys find wide application in marine, shipbuilding, aviation, railway, offshore platform applications and othe
Externí odkaz:
https://doaj.org/article/cfd946dfbe364d988ab2c2b87d7adf52
Autor:
Galya Duncheva, Jordan Maximov, Angel Anchev, Vladimir Dunchev, Yaroslav Argirov, Svetlozar Velkov
Publikováno v:
Machines, Vol 11, Iss 9, p 872 (2023)
This article outlines a technology for hole-finishing in short-length cylinder lines to improve wear resistance. The technology is based on an optimized diamond-burnishing (DB) process. The latter was implemented on conventional and CNC lathes, milli
Externí odkaz:
https://doaj.org/article/4f2e21f8a0914ea2b09682dd76b3fd01
Autor:
Jordan Maximov, Galya Duncheva
Publikováno v:
Applied Sciences, Vol 13, Iss 5, p 3313 (2023)
This review paper analyses and summarises the results found while studying the slide burnishing (SB) of metal components refracted through a prism during the surface engineering (SE) process, over the period of January 2019 to January 2023. According
Externí odkaz:
https://doaj.org/article/b8f38cd4b561439697c1a60a96c2e001
Autor:
Jordan Maximov, Galya Duncheva, Angel Anchev, Vladimir Dunchev, Yaroslav Argirov, Maria Nikolova
Publikováno v:
Applied Sciences, Vol 13, Iss 4, p 2570 (2023)
The surface cold working (SCW) of austenitic stainless steel (SS) causes martensitic transformation in the surface layers, and the percentage fraction of the strain-induced martensite depends on the degree of SCW. Higher content of α′−martensite
Externí odkaz:
https://doaj.org/article/9953d9964d874b518f023354da8f5d62