Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Vahid Javaheri"'
Publikováno v:
Metals, Vol 14, Iss 1, p 60 (2024)
The microstructure and mechanical properties of a low-alloy medium carbon steel (Fe-0.5C-0.9Mn-1Cr-0.16V, in wt.%) were investigated after rapid tempering and compared with a conventionally tempered counterpart. The conventional thermal cycle was per
Externí odkaz:
https://doaj.org/article/27d7477e17b64db4b194058c6576c7d2
Autor:
Vahid Javaheri, Sakari Pallaspuro, Saeed Sadeghpour, Sumit Ghosh, Johannes Sainio, Renata Latypova, Jukka Kömi
Publikováno v:
Materials & Design, Vol 231, Iss , Pp 112059- (2023)
Rapid tempering is a remarkable sustainable and energy-efficient way to modify properties of as-quenched martensite, particularly its toughness and ductility. In this work, tensile and fracture toughness properties, and microstructural evolution of a
Externí odkaz:
https://doaj.org/article/ec1243f2dc7b42259463e026fedfa41e
Autor:
Sumit Ghosh, Pentti Kaikkonen, Vahid Javaheri, Antti Kaijalainen, Ilkka Miettunen, Mahesh Somani, Jukka Kömi, Sakari Pallaspuro
Publikováno v:
Journal of Materials Research and Technology, Vol 17, Iss , Pp 1390-1407 (2022)
The novel processing concept of direct quenching and partitioning (DQ&P) has been explored with a medium-carbon (0.4 wt.% C) steel to evaluate and optimize the processing route for excellent property combinations. New compositional design approach wa
Externí odkaz:
https://doaj.org/article/743424a5edb04d50a24a2be63951a6ea
Publikováno v:
Data in Brief, Vol 41, Iss , Pp 107856- (2022)
The data available in this article presents the microstructural information achieved via scanning electron microscopy and electron backscatter diffraction to evaluate the microstructure of maraging stainless steel 13Cr10Ni1.7Mo2Al0.4Mn0.4Si, in its a
Externí odkaz:
https://doaj.org/article/e5a54a31447f4748894aeb8c5faf7fd6
Autor:
Shahriar Afkhami, Vahid Javaheri, Mohsen Amraei, Tuomas Skriko, Heidi Piili, Xiao-Ling Zhao, Timo Björk
Publikováno v:
Materials & Design, Vol 213, Iss , Pp 110336- (2022)
Ultra-high strength steels (UHSS) have a determining role in construction and industry. Furthermore, welding as the primary joining process for steel has a similar role in promoting its applications. Therefore, welded UHSS have a vital role in relate
Externí odkaz:
https://doaj.org/article/b161edd8ffae43169533177366ff0dad
Publikováno v:
Materials, Vol 15, Iss 20, p 7322 (2022)
A novel processing route is proposed to create a heterogeneous, multiphase structure in a medium Mn steel by incorporating partial quenching above the ambient, warm deformation, and partial recrystallization at high partitioning temperatures. The pro
Externí odkaz:
https://doaj.org/article/cf488b6540db44f2a668076424071f5f
Publikováno v:
Materials & Design, Vol 182, Iss , Pp - (2019)
Numerical and Gleeble experimental data are combined to predict potential microstructure and hardness profiles through the wall thickness of an induction hardened slurry transportation pipe made of a recently developed 0.4 wt% C, Nb-microalloyed stee
Externí odkaz:
https://doaj.org/article/19bf7feae9f1422293bdabd49f4652e8
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:
Acta Metallurgica Slovaca, Vol 24, Iss 4 (2018)
Heat-resistant steels of HP series (Fe-25Cr-35Ni) are used in high temperature structural applications. Their composition include Nb as strong carbide former. Electron Backscatter Diffraction (EBSD) investigations revealed that, in the as-cast condit
Externí odkaz:
https://doaj.org/article/ec27f38ae9af4ec0a59f6cc453fe3f76
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