Boron – Carbon – Iron

Rogl, P.

doi:10.1007/978-3-540-69761-9_15

Cited by 4 publications

(1 citation statement)

References 29 publications

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“…The temperature range of the last peak leading to the melting of the MA corresponds to the ternary eutectic temperature in the Fe-B-C systems (γFe + Fe 2 B + Fe 3 (B,C) → Liquid) that occurs at a temperature of 1097°C [25]. The reaction is expected to be the same in both steel grades containing the MA.…”

Section: Identification Of the Key Events Occurring During Sintering ...mentioning

confidence: 99%

Characterisation of the mechanisms taking place during liquid phase sintering of PM boron steels with the help of artificial intelligence

Gélinas

Blais

2022

Powder Metallurgy

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Liquid phase sintering (LPS) of powder metallurgy (PM) components is a well-recognised strategy to enhance the densification of pressed-and-sintered compacts. This work reports the investigation on the liquid phase formation when a Fe-Ni-Mn-C-B master alloy (MA) is used as a boron carrier in combination with two iron base powders pre-alloyed with Mo. Through differential scanning calorimetry tests, quantitation of the microstructure with the help of artificial intelligence, as well as measurement of sintered density and strength as a function of sintering temperature, it was possible to unravel the mechanisms that take place before and during LPS. It was confirmed that a cascade of events takes place in the solid state prior to reaching the temperature necessary for a eutectic reaction to form a liquid. Additionally, the pre-alloyed Mo content was identified as a factor that modifies the initiation of LPS but not the LPS mechanisms per se.

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Section: Identification Of the Key Events Occurring During Sintering ...mentioning

confidence: 99%

Characterisation of the mechanisms taking place during liquid phase sintering of PM boron steels with the help of artificial intelligence

Gélinas

Blais

2022

Powder Metallurgy

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Influence of boron carbide on core degradation during severe accidents in LWRs

Steinbrück

2014

Annals of Nuclear Energy

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Solidification Structures in Low-Alloyed Powder Metallurgy Steels Obtained through Permanent Liquid Phase Sintering Using a Master Alloy Containing Boron

Gélinas

Rousseau²,

Blais

2020

Materials Performance and Characterization

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Powder metallurgy (PM) steels containing boron form an attractive group of alloys because of the important densification that can be achieved through permanent liquid phase sintering (LPS). However, upon solidification, such liquid phase is known to form borides or borocarbides. Recent works have shown that some alloying elements have significant interactions with the LPS of PM steels containing boron. More specifically, it is suspected that the concentration of prealloyed molybdenum influences the formation of boride/borocarbide upon cooling at the end of the sintering cycle. Therefore, the main objective of this work is to describe the relationship that exists between the concentration of prealloyed molybdenum and the crystal structure of the boride/borocarbide eutectic component that typically forms in PM steels containing boron. A master alloy made of iron-manganese-nickel-boron-carbon was utilized to introduce boron, thus providing enhanced sintering through LPS. Characterization in optical and scanning electron microscopy combined with electron-backscattered diffraction and energy-dispersive X-ray spectrometry (EDS) revealed that increasing the prealloyed molybdenum content not only increased the volume fraction of liquid phase but also modified the morphology and the nature of the boron-rich eutectic. Changing the prealloyed molybdenum content from 0.5 to 0.85 wt.% transformed the discontinuous M2B boride to a continuous M23(C,B)6 borocarbide phase, causing a drastic decrease in strength despite the higher densification observed at 0.85 wt.% molybdenum. The effect of molybdenum on the LPS process of boron PM steels is undeniable and was found to occur after the initial formation of the liquid phase. Indeed, differential scanning calorimetry revealed no difference in the endothermic melting peaks temperature for both concentration of molybdenum.

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Boron – Carbon – Iron

Cited by 4 publications

References 29 publications

Characterisation of the mechanisms taking place during liquid phase sintering of PM boron steels with the help of artificial intelligence

Characterisation of the mechanisms taking place during liquid phase sintering of PM boron steels with the help of artificial intelligence

Influence of boron carbide on core degradation during severe accidents in LWRs

Solidification Structures in Low-Alloyed Powder Metallurgy Steels Obtained through Permanent Liquid Phase Sintering Using a Master Alloy Containing Boron

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