ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559

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Dependence of Carbon Concentration and Alloying Elements on the Stability of Iron Carbides
Hideaki SawadaNaoki MaruyamaShinichiro TabataKazuto Kawakami
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JOURNAL OPEN ACCESS Advance online publication

Article ID: ISIJINT-2018-695

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Abstract

The precipitation of iron carbides is a crucial factor that determines the properties of tempered martensite. However, the effect of alloying elements on the carbon concentration of ε carbide has not yet been clarified. In this work, we studied the effect of alloying elements on the carbon concentration of ε carbide using first-principles calculations and a three-dimensional atom probe. The first-principles calculations showed that ε carbide with a lower carbon concentration tends to form by the inclusion of Si. The carbon concentration in ε carbide measured by the three-dimensional atom probe was consistent with the first-principles calculations.

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