Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/189261
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Contributions of Rare Earth Element (La,Ce) Addition to the Impact Toughness of Low Carbon Cast Niobium Microalloyed Steels |
Autor: | Torkamani, Hadi; Raygan, Shahram; García Mateo, Carlos CSIC ORCID CVN ; Rassizadehghani, Jafar; Palizdar, Yahya; San-Martín, David CSIC ORCID | Palabras clave: | Cast microalloyed steel Inclusion Grain size Impact toughness RE addition |
Fecha de publicación: | 2018 | Editor: | Springer Nature | Citación: | Metals and Materials International 24 (4): 773-788 (2018) | Resumen: | In this research Rare Earth elements (RE), La and Ce (200 ppm), were added to a low carbon cast microalloyed steel to disclose their influence on the microstructure and impact toughness. It is suggested that RE are able to change the interaction between the inclusions and matrix during the solidification process (comprising peritectic transformation), which could affect the microstructural features and consequently the impact property; compared to the base steel a clear evolution was observed in nature and morphology of the inclusions present in the RE-added steel i.e. (1) they changed from MnS-based to (RE,Al)(S,O) and RE(S)-based; (2) they obtained an aspect ratio closer to 1 with a lower area fraction as well as a smaller average size. Besides, the microstructural examination of the matrix phases showed that a bimodal type of ferrite grain size distribution exists in both base and RE-added steels, while the mean ferrite grain size was reduced from 12 to 7 μm and the bimodality was redressed in the RE-added steel. It was found that pearlite nodule size decreases from 9 to 6 μm in the RE-added steel; however, microalloying with RE caused only a slight decrease in pearlite volume fraction. After detailed fractography analyses, it was found that, compared to the based steel, the significant enhancement of the impact toughness in RE-added steel (from 63 to 100 J) can be mainly attributed to the differences observed in the nature of the inclusions, the ferrite grain size distribution, and the pearlite nodule size. The presence of carbides (cementite) at ferrite grain boundaries and probable change in distribution of Nb-nanoprecipitation (promoted by RE addition) can be considered as other reasons affecting the impact toughness of steels under investigation. | Versión del editor: | https://doi.org/10.1007/s12540-018-0084-9 | URI: | http://hdl.handle.net/10261/189261 | DOI: | 10.1007/s12540-018-0084-9 | Identificadores: | doi: 10.1007/s12540-018-0084-9 issn: 1225-9438 |
Aparece en las colecciones: | (CENIM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
57
checked on 17-abr-2024
WEB OF SCIENCETM
Citations
47
checked on 27-feb-2024
Page view(s)
143
checked on 18-abr-2024
Download(s)
16
checked on 18-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.