Influence of Si on the microstructure and C redistribution in martensitic steels

Seehaus, Mattis; Korte‐Kerzel, Sandra; Sandlöbes-Haut, Stefanie

doi:10.1016/j.matdes.2023.111875

Cited by 2 publications

(1 citation statement)

References 88 publications

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“…However, it is known [28,29,50] that carbon content with martensite in the matrix is <0.22 at.%. Therefore, excess carbon quantity is 0.35 and 0.64 at.% in the Fe-0.34 and Fe-0.44C steels, respectively, and this carbon may be consumed by HAB segregations [19,37,51] or may retain in the martensitic matrix. It was shown [19] that carbon excess at random HABs is higher than that at LABs by a factor of ~5 in mediumcarbon low-alloy steel.…”

Section: Carbon Redistribution In Lath Martensite Structure and Quenc...mentioning

confidence: 99%

Quench and Tempered Embrittlement of Ultra-High-Strength Steels with Transition Carbides

Mishnev

Borisova

Kniaziuk

et al. 2023

Metals

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The effect of tempering after water quenching on the strength and fracture toughness of two steels with chemical compositions of 0.34%C-1.77%Si-1.35Mn-0.56%Cr-0.2%Mo-0.04%Nb-0.03Ti-0.002B and 0.44%C-1.81%Si-1.33%Mn-0.82%Cr-0.28%Mo was examined. The last steel exhibits quenching embrittlement in an as-quenched condition. At a tempering temperature of 280 °C, the precipitation of transition η–Fe2C carbides in martensitic matrix leads to increasing fracture toughness and eliminates quench embrittlement in the steel with 0.44 wt.%C. Tempered martensite embrittlement at 400 °C appears as decreased values of the Charpy V-notch impact energy, ductility and the product of strength and elongation, σB´δ (MPa´%) and is attributed to increased effective grain size for fracture, mainly. The precipitation of boundary cementite takes place at tempering at 500 °C and provides increased ductility and fracture toughness despite a decohesion along carbide/ferrite interfaces. The low severity of TME in Si-rich low-alloy medium carbon steels is attributed to the suppression of boundary cementite precipitation at tempering temperatures ≤400 °C.

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Section: Carbon Redistribution In Lath Martensite Structure and Quenc...mentioning

confidence: 99%

Quench and Tempered Embrittlement of Ultra-High-Strength Steels with Transition Carbides

Mishnev

Borisova

Kniaziuk

et al. 2023

Metals

View full text Add to dashboard Cite

show abstract

Mechanisms for microstructural evolution of FeSiCrNi high silicon steel subjected to thermomechanical processing

Feng,

Wang,

Han

et al. 2024

Materials & Design

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Influence of Si on the microstructure and C redistribution in martensitic steels

Cited by 2 publications

References 88 publications

Quench and Tempered Embrittlement of Ultra-High-Strength Steels with Transition Carbides

Quench and Tempered Embrittlement of Ultra-High-Strength Steels with Transition Carbides

Mechanisms for microstructural evolution of FeSiCrNi high silicon steel subjected to thermomechanical processing

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