Effect of silicon on the structure and properties of high-strength spherulitic iron

Sil'man, G. I.; Kamynin, V. V.; Kharitonenko, S. A.

doi:10.1007/s11041-006-0083-1

Cited by 1 publication

(6 citation statements)

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“…Thereafter, the tensile properties and the elongations declined, leading to 500 MPa UTS and 4% elongation at 4.8% Silicon. This shows that the elongation degradation at around 4.3% Si reported by Stets et al in 2013 [42] was already indicated by Silman in 2006 [43].…”

Section: Microcomposite Structurization Of Ferrite In High Silicon Ironsupporting

confidence: 76%

“…The solid solution hardening of Si is limited to around 4.3% [42][43][44]. Around and above this level, the elongation falls sharply.…”

Section: Alloying Strategies For High Silicon Ironmentioning

confidence: 95%

“…The equilibrium conditions that apply for the ferrite when alloyed with silicon are the most overlooked aspects of HSI research. The equilibrium solubility limit for silicon in ferrite is 3 wt% in pure iron, as seen in Figure 4, after which, the thermodynamic activity of carbon in the ferrite decreases [43]. How this reduction in carbon activity affects the diffusion of carbon in BCC in the presence of Si can be found elsewhere [53].…”

Section: Microcomposite Structurization Of Ferrite In High Silicon Ironmentioning

confidence: 97%

“…However, it is uncertain if any established matrix damaging mechanism describes or incorporates the effect of silicumferrite (α 1 ) in the ascast state or any clustering and their twinning or the effect of recrystallized "relief" ferrite within the ferrite microstructure. Maximum tensile strength occurred at 4.2% Si where the elongation exceeded 10%; then, the microstructure contained 25% silicumferrite (α 1 ) [43]. Thereafter, the tensile properties and the elongations declined, leading to 500 MPa UTS For different Si concentrations, the spinodal decomposition occurs at different temperatures [44].…”

Section: Microcomposite Structurization Of Ferrite In High Silicon Ironmentioning

confidence: 99%

“…For rapid cooling, a supersaturated ferrite is obtained that is sensitive to aging during annealing [44]. However, with higher temperature normalization, it would seem likely that the supersaturated ferrite is partially or fully recrystallized [43,54], which could lead to a more advantageous microstructural development. However, for ambient cooling, no significant effect on Si micro-segregation is obtained [45].…”

Section: Microcomposite Structurization Of Ferrite In High Silicon Ironmentioning

confidence: 99%

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Influence of Strain Rate, Temperature and Chemical Composition on High Silicon Ductile Iron

Borgström¹

2021

Minerals

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Today, the use of solution hardened ductile iron is limited by brittleness under certain conditions. If chassis components are subjected to loads having high strain rates exceeding those imposed during tensile testing at sub-zero temperatures, unexpected failure can occur. Therefore, it is the purpose of this review to discuss three main mechanisms, which have been related to brittle failure in high silicon irons: intercritical embrittlement, the integrity of the ferritic matrix and deformation mechanisms in the graphite. Intercritical embrittlement is mainly attributed to the formation of Mg- and S-rich grain boundary films. The formation of these films is suppressed if the amount of free Mg- and MgS-rich inclusions is limited by avoiding excess Mg and/or by the passivation of free Mg with P. If the grain boundary film is not suppressed, the high silicon iron has very low elongations in the shakeout temperature regime: 300 to 500 °C. The integrity and strength of the ferrite are limited by the reduced ordering of the silicumferrite with increasing silicon content, once the “ordinary” ferrite is saturated at 3% silicon, depending on the cooling conditions. Finally, the graphite damaging mechanisms are what dictate the properties most at low temperatures (sub −20 °C).

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Section: Microcomposite Structurization Of Ferrite In High Silicon Ironsupporting

confidence: 76%

“…The solid solution hardening of Si is limited to around 4.3% [42][43][44]. Around and above this level, the elongation falls sharply.…”

Section: Alloying Strategies For High Silicon Ironmentioning

confidence: 95%

Section: Microcomposite Structurization Of Ferrite In High Silicon Ironmentioning

confidence: 97%

Section: Microcomposite Structurization Of Ferrite In High Silicon Ironmentioning

confidence: 99%

Section: Microcomposite Structurization Of Ferrite In High Silicon Ironmentioning

confidence: 99%

See 3 more Smart Citations

Influence of Strain Rate, Temperature and Chemical Composition on High Silicon Ductile Iron

Borgström¹

2021

Minerals

View full text Add to dashboard Cite

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Effect of silicon on the structure and properties of high-strength spherulitic iron

Cited by 1 publication

References 0 publications

Influence of Strain Rate, Temperature and Chemical Composition on High Silicon Ductile Iron

Influence of Strain Rate, Temperature and Chemical Composition on High Silicon Ductile Iron

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