Graphite Growth Morphologies in High Al Cast Iron

Muhmond, Haji Muhammad; Fredriksson, Hasse

doi:10.1002/9781119093367.ch38

Cited by 2 publications

(2 citation statements)

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“…A transition within the investigated range of cooling rates would thus give some insight in graphite growth mechanisms. Aluminium -which is reported as a vermicular graphite promoter [1][2][3][4][5] -was selected because it affects graphite shape above a critical level which is within the capabilities of modern means for microanalysis.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cooling Rate and Aluminium Addition on Graphite Growth during Solidification and Graphitization

Bourdie

Bruneseaux

Parseval

et al. 2018

MSF

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Abstract. Even using high inoculation levels, mottled structures are often obtained when casting Mg-treated cast irons in thin wall parts. For full graphitization of the cast components, this calls for a subsequent heat-treatment which is generally achieved in the austenite field. The aim of this work was investigating the impact of the process and the cooling rate on the graphite structure for two different casting conditions. The influence of the cooling rate on graphite degeneracy due to the presence of impurity was also investigated considering low-level additions of aluminium. Extensive metallographic investigation has been carried out from which it is concluded that the internal graphite structure is the same for the two studied cooling conditions. Accordingly, the growth mechanism of graphite should be the same when it precipitates from liquid, during eutectic reaction or else solid-state graphitization. Finally, microanalyses suggest magnesium and aluminium do not interact in the same way with graphite during its growth.

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Section: Introductionmentioning

confidence: 99%

Effect of Cooling Rate and Aluminium Addition on Graphite Growth during Solidification and Graphitization

Bourdie

Bruneseaux

Parseval

et al. 2018

MSF

View full text Add to dashboard Cite

show abstract

“…Microsegregation is also an issue for the austempering of ADI parts as well as for so-called dual-phase microstructures. It is worth noting that recent studies have demonstrated that 1-3 wt.% Al added to a silicon cast iron inverses silicon segregation (Muhmond and Fredriksson, 2015;Franzen et al, 2019). This finding may soon be exploited to decrease microsegregation and thus improve the matrix properties of cast iron.…”

Section: Globalmentioning

confidence: 90%

Cast Iron: A Historical and Green Material Worthy of Continuous Research

Jacques¹,

Dawson²,

Alain³

2021

IJTech

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Throughout history, cast iron has been unique amongst metallic materials. No other metal can boast such a long history, together with such a wide diversity of variants, properties, and applications. Arguably, no other material can claim to have such complexity. While the cast iron foundry produces myriad components, researchers and engineers have humbly ensured the continued development of this sophisticated material. We control this process not with furnaces and wirefeeders, but with knowledge. This knowledge enables the creation of a material with a unique combination of design flexibility, mechanical properties, wear resistance, recyclability, low life cycle energy consumption, and low cost. And it will be with the continued pursuit of understanding and knowledge that tomorrow's researchers and engineers will ensure the continued growth of new material variants, with improved material properties and new applications that make the world a better place. Cast iron: thousands of years of development and progress behind us; thousands of fascinating mysteries and opportunities ahead of us.

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Graphite Growth Morphologies in High Al Cast Iron

Cited by 2 publications

References 10 publications

Effect of Cooling Rate and Aluminium Addition on Graphite Growth during Solidification and Graphitization

Effect of Cooling Rate and Aluminium Addition on Graphite Growth during Solidification and Graphitization

Cast Iron: A Historical and Green Material Worthy of Continuous Research

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