Nucleation and growth of selective oxide particles on ferritic steel

Ollivier-Leduc, A.; Giorgi, Marie-Laurence; Balloy, David; Guillot, J.-B.

doi:10.1016/j.corsci.2010.03.030

Cited by 33 publications

(10 citation statements)

References 12 publications

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“…of the steels studied here-mixed Mn-Si oxides are predominantly formed [25][26][27][28]. Formation of a sulfide layer on the surface of such oxides is observed in specific areas (Point B in Fig.…”

Section: A T E R I a L S C H A R A C T E R I Zmentioning

confidence: 94%

Effect of processing conditions on microstructural features in Mn–Si sintered steels

Oro¹,

Hryha²,

Campos³

et al. 2014

Materials Characterization

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• Oxide distribution in steels containing oxidation-sensitive elements• Mn, Si introduced in a master alloy powder, mixed with a base iron powder• Selective oxidation of Mn and Si on iron grain boundaries Sintering of steels containing oxidation sensitive elements is possible if such elements are alloyed with others which present lower affinity for oxygen. In this work, a master alloy powder containing Fe-Mn-Si-C, specifically designed to create a liquid phase during sintering, has been used for such purpose. The effect of processing conditions such as sintering temperature and atmosphere was studied with the aim of describing the microstructural evolution as well as the morphology and distribution of oxides in the sintered material, evaluating the potential detrimental effect of such oxides on mechanical properties.Chemical analyses, metallography and fractography studies combined with X-ray photoelectron spectroscopy analyses on the fracture surfaces were used to reveal the main mechanism of fracture and their correlation with the chemical composition of the different fracture surfaces.The results indicate that the main mechanism of failure in these steels is brittle fracture in the surrounding of the original master alloy particles due to degradation of grain boundaries by the presence of oxide inclusions. Mn-Si oxide inclusions were observed on intergranular decohesive facets. The use of reducing atmospheres and high sintering temperatures reduces the amount and size of such oxide inclusions. Besides, high heating and cooling rates reduce significantly the final oxygen content in the sintered material. A model for microstructure development and oxide evolution during different stages of sintering is proposed, considering the fact that when the master alloy melts, the liquid formed can dissolve some of the oxides as well as the surface of the surrounding iron base particles.

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Section: A T E R I a L S C H A R A C T E R I Zmentioning

confidence: 94%

Effect of processing conditions on microstructural features in Mn–Si sintered steels

Oro¹,

Hryha²,

Campos³

et al. 2014

Materials Characterization

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show abstract

“…Within the past decades, many efforts have been taken to shine light on the mechanisms of material degradation and precipitate formation in iron-based alloys, both from an experimental side [17][18][19][20][21][22][23], as well as by using theoretical simulations [24][25][26]. However, many works in this area either consider technical alloys, possessing rather complex steel compositions or investigate corrosion in complex gas mixtures (e.g.…”

Section: Introductionmentioning

confidence: 99%

Modelling and experiment of selective oxidation and nitridation of binary model alloys at 700 °C – The systems Fe, 1 wt.%{Al, Cr, Mn, Si}

2015

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“…This cooling does not modify the selective oxides present at 450°C. According to data published in the literature, 2,20,24) selective oxidation of the steel alloying elements occurs only at temperatures higher than 600°C.…”

Section: Characterizationsmentioning

confidence: 99%

Improvement of Wettability between Steel and Liquid Zn–Al Alloy by Forced Wetting

et al. 2018

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Nucleation and growth of selective oxide particles on ferritic steel

Cited by 33 publications

References 12 publications

Effect of processing conditions on microstructural features in Mn–Si sintered steels

Effect of processing conditions on microstructural features in Mn–Si sintered steels

Modelling and experiment of selective oxidation and nitridation of binary model alloys at 700 °C – The systems Fe, 1 wt.%{Al, Cr, Mn, Si}

Improvement of Wettability between Steel and Liquid Zn–Al Alloy by Forced Wetting

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