Zobrazeno 1 - 10
of 34
pro vyhledávání: '"Tuomas Alatarvas"'
Publikováno v:
Journal of Materials Research and Technology, Vol 30, Iss , Pp 6133-6153 (2024)
The effect of cooling rate and Nb addition on the phase transformation, microstructures, and mechanical properties of thermomechanically controlled hot-rolled low-carbon CrNiMnMoB ultrahigh-strength steel were studied. The aspects impeding Nb's benef
Externí odkaz:
https://doaj.org/article/c3ad8373864f4f7eb070e3023f5dd407
Autor:
Ekta Rani, Vandna K. Gupta, Francis Gyakwaa, Mourad Kharbach, Harishchandra Singh, Tuomas Alatarvas, Anna Martinelli, Timo Fabritius, Marko Huttula
Publikováno v:
Results in Materials, Vol 23, Iss , Pp 100598- (2024)
Investigating non-metallic inclusions within ultra-high-strength-steel via conventional methods is a known: however, the challenge is to obtain chemical information of such inclusions at the sub-micrometer level. In this context, probing Fe-based oxi
Externí odkaz:
https://doaj.org/article/71d04a2e264d479d94fafa4793e7ccd2
Publikováno v:
Materials & Design, Vol 232, Iss , Pp 112139- (2023)
The kinetics of solid-state reactions involving non-metallic inclusions (NMIs) in steel is a topic of growing interest due to the need to understand the effects of heat treatments on NMI composition and stability. In this study, a High Temperature En
Externí odkaz:
https://doaj.org/article/ddd60941202e4ee8b6cf69651f8c2d62
Autor:
Ekta Rani, Harishchandra Singh, Tuomas Alatarvas, Mourad Kharbach, Wei Cao, Brice Sarpi, Lin Zhu, Yuran Niu, Alexei Zakharov, Timo Fabritius, Marko Huttula
Publikováno v:
Journal of Materials Research and Technology, Vol 17, Iss , Pp 2333-2342 (2022)
Despite the common challenge of investigating non-metallic inclusions within ultra-high-strength-steel (UHSS) at sub-micrometer scale via conventional methods, probing nitride inclusions at elevated temperatures is vital for guiding steel’ performa
Externí odkaz:
https://doaj.org/article/1c40a48537d544a88ac8fc1bdbd04878
Publikováno v:
Metals, Vol 13, Iss 1, p 43 (2022)
Identification and characterization play an essential role in the study of non-metallic inclusions (NMIs) in monitoring the steel casting process and product quality. This study uses Raman spectroscopy, a versatile, relatively fast, and non-destructi
Externí odkaz:
https://doaj.org/article/81b9a7b59b9445ce9eb300a085fd30ea
Publikováno v:
Metals, Vol 12, Iss 3, p 522 (2022)
The occurrence of non-deformable, non-metallic inclusions is the dominant reason for failure of wire during drawing and degrades service life for some steel grades, e.g., tire cord steel. To investigate the deformability of glassy inclusions in CaO-A
Externí odkaz:
https://doaj.org/article/78c95ef481f740249568d689a50ecb74
Autor:
Henri Tervo, Antti Kaijalainen, Vahid Javaheri, Mohammed Ali, Tuomas Alatarvas, Mikko Mehtonen, Severi Anttila, Jukka Kömi
Publikováno v:
Metals, Vol 11, Iss 11, p 1783 (2021)
The presence of acicular ferrite (AF) in the heat-affected zone (HAZ) of steels used offshore is generally seen as beneficial for toughness. In this study, the effects of varying fractions of AF (0–49 vol.%) were assessed in the simulated, unaltere
Externí odkaz:
https://doaj.org/article/a42191fff658487795aa8fbfd5f14780
Publikováno v:
Metals, Vol 11, Iss 10, p 1549 (2021)
Steel quality and properties can be affected by the formation of complex inclusions, including Ti-based inclusions such as TiN and Ti2O3 and oxides like Al2O3 and MgO·Al2O3 (MA). This study assessed the prospective use of Raman spectroscopy to chara
Externí odkaz:
https://doaj.org/article/c06ccf6d985749bbb331f5c79155d013
Autor:
Henri Tervo, Antti Kaijalainen, Vahid Javaheri, Satish Kolli, Tuomas Alatarvas, Severi Anttila, Jukka Kömi
Publikováno v:
Metals, Vol 10, Iss 8, p 1096 (2020)
Deterioration of the toughness in heat-affected zones (HAZs) due to the thermal cycles caused by welding is a known problem in offshore steels. Acicular ferrite (AF) in the HAZ is generally considered beneficial regarding the toughness. Three experim
Externí odkaz:
https://doaj.org/article/ff4ebb93bd944e00b5299d8b2ce54cab
Autor:
Francis Gyakwaa, Matti Aula, Tuomas Alatarvas, Tero Vuolio, Qifeng Shu, Marko Huttula, Timo Fabritius
Publikováno v:
Applied Sciences, Vol 10, Iss 6, p 2113 (2020)
The presence of non-metallic inclusions (NMI) such as sulphides and oxides may be detrimental to the control of the steel casting process and product quality. The need for their identification and characterization is, therefore, urgent. This study us
Externí odkaz:
https://doaj.org/article/5591787acdad42c49d95de426d1b92dc