Effect of Solute Silicon on the Lattice Parameter of Ferrite in Ductile Irons

Huyan, Fei; Larker, Richard; Rubin, Per; Hedström, Peter

doi:10.2355/isijinternational.54.248

Cited by 18 publications

(9 citation statements)

References 9 publications

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“…5,16 New full ferritic DI grades, which are effectively solution strengthened by a silicon content in a range of 3 to 4.3 wt-%, are of growing interest. 17 The mechanical properties as well as thermal-and weather-resistance of these silicon solid solution strengthened full ferritic DI grades (SSF DI) are equal to or better than these properties of the conventional DI grades. Transferring SSF DI into the production scale resulted in cost savings of up to 10% due to decreased machining costs, related to the soft ferritic matrix, and construction tolerances, related to a higher yield strength and elongation at fracture of SSF DI.…”

Section: Introductionmentioning

confidence: 99%

“…For their realisation, a silicon content of 3.2, 3.8 and 4.3 wt-% is suggested, in particular. [17][18][19][20][21][22] However, due to the high silicon content the SSF DI's maximum and impact strength as well as casting properties are limited. 8,20,[23][24][25][26][27] In addition, for the production of EN-GJS-600-10, realised by a silicon solid solution strengthening, a silicon content of 4.3 wt-% is recommended.…”

Section: Introductionmentioning

confidence: 99%

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Influence of nickel and cobalt on microstructure of silicon solution strengthened ductile iron

Weiβß

Brachmann

Bührig–Polaczek

et al. 2015

Materials Science and Technology

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‘Second Generation’ ductile iron with a silicon content of up to 4.3 wt- exhibits a fully ferritic matrix, which is solution strengthened by silicon. Outstanding advantages of these ductile iron grades result in their strongly increasing demand. However, due to a presumed formation of a silicon long range order, the maximum strength is limited to 600 MPa at 4.3 wt- silicon. At higher silicon content, the mechanical properties dramatically decrease. In order to increase the maximum achievable strength, the potential of additional solution strengthening elements is subject of present research. Initially, the effects of cobalt and nickel on matrix, graphite shape and nodule count are investigated. Cobalt and nickel are identified as promising candidates for further solid solution hardening.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of nickel and cobalt on microstructure of silicon solution strengthened ductile iron

Weiβß

Brachmann

Bührig–Polaczek

et al. 2015

Materials Science and Technology

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“…En general se observó que, para toda la ventana de procesamiento, las muestras consolidadas presentaron la fase ferrita (-Fe) con constante de red ~2,852 Å, la cual es menor que el valor para la fase -Fe de 2,866 Å. Esta reducción del 0,5% puede estar asociada con la presencia en solución sólida del Si en la estructura BCC del Fe. Este efecto ha sido reportado para aleaciones base hierro dúctiles en donde se muestra una dependencia lineal inversa del parámetro de red del Fe con el contenido de Si hasta 4,61 % en peso (~9 % atómico) [28]. Estudios teóricos y experimentales muestran que el Si tiene preferencia de sitio sustitucional y reemplaza al hierro en las fases -Fe y tipo carburo Fe3C [29,30], de tal forma que la expresión adecuada para la identificación de la fase en la Figura 5 es -(Fe,Si).…”

Section: Resultados Y Análisisunclassified

Fusión Láser en Cama De Polvos De Un Vidrio Metálico Base Hierro: Estudio Exploratorio

Penenrey

2022

rev. colom. mater.

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Actualmente, la fabricación de componentes volumétricos a partir de vidrios metálicos y/o aleaciones fuera del equilibrio es un reto debido a las condiciones de enfriamiento requeridas para obtener un estado amorfo completo y/o un conjunto de fases en particular. Algunas tecnologías de fabricación aditiva, como la sinterización directa de metal por láser (DMLS), pueden ofrecer una alternativa para la fabricación de componentes de vidrio metálico a partir de polvos de materia prima 100 % amorfos. El principal desafío cuando estos materiales se procesan mediante fabricación aditiva es mantener el contenido amorfo del polvo inicial en las piezas finales. En el presente trabajo, se empleó un vidrio metálico comercial con hierro como su elemento principal, con el fin de realizar un estudio exploratorio de la influencia de los principales parámetros del proceso DMLS sobre la capacidad de este material para formar piezas consolidadas por este proceso. Los parámetros estudiados aquí fueron la potencia del láser, la velocidad de escaneo y la densidad de energía volumétrica. Se empleó la técnica de difracción de rayos X para realizar la caracterización de las fases obtenidas en las piezas fabricadas. Los resultados del estudio sugieren que la fabricación de piezas con el material estudiado es posible, pero existe un rango de densidades de energía aplicadas por el láser durante el proceso dentro de los que se favorece la formación de las piezas.

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“…The same can be said for Spec-imen1 peaks at 61°and 84°being displaced θ (222) and θ (115). However, the possibility of additions of Si influencing the peak positions of ferrite of Speci-men1 in Figure 4, as discussed by Speich et al [60] and by Huyan et al [61], and of cementite, discussed by Okamoto and Kagawa [62], has been dismissed due to the lattice parameter changes being too small to affect the necessary changes in 2θ values. Several tests were undertaken with a control specimen to rule out the unidentified peaks being associated with the X-ray equipment or specimen preparation.…”

Section: Discussionmentioning

confidence: 99%

Role of preplaced silicon on a TIG processed SiC incorporated microalloyed steel

Baker

Escalona

Olasolo

et al. 2020

Materials Science and Technology

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Research aimed at enhancing the surface properties of carbon steels by incorporating fine silicon carbide particulates has had limited success because the dissolution of the ceramic occurred. This research considers a method of reducing SiC dissolution by generating a high Fe–Si liquid which protects the ceramic. Three particulate groups were investigated, (1) ∼ 5 µm SiC, (2) ∼45 µm Si +∼ 5 µm SiC, and (3) ∼45 µm Si, all incorporated into a microalloyed steel using a tungsten inert gas process. Detailed microhardness of the melt zones together with microstructural analysis showed that the addition of Si resulted in a cracked hard layer containing SiC. However, in Specimen 1, a thicker, hardcrack-free layer resulted from the microstructure developed by the dissolution of SiC.

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Effect of Solute Silicon on the Lattice Parameter of Ferrite in Ductile Irons

Cited by 18 publications

References 9 publications

Influence of nickel and cobalt on microstructure of silicon solution strengthened ductile iron

Influence of nickel and cobalt on microstructure of silicon solution strengthened ductile iron

Fusión Láser en Cama De Polvos De Un Vidrio Metálico Base Hierro: Estudio Exploratorio

Role of preplaced silicon on a TIG processed SiC incorporated microalloyed steel

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