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Published in:
12-12-2019
Kinetic Constraints of δ-Ferrite to the Formation of Kappa (κ) Carbide in a Fe-4Mn-9Al-0.3C Wt Pct Low-Density Steel
Published in: Metallurgical and Materials Transactions A | Issue 2/2020
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Abstract
Aluminum is the key ingredient in low-density steels. It leads to the formation of δ-ferrite in a large fraction. In order to study the influence, two different experimental approaches were devised. In a first of its kind, the sample was arc melted in an argon atmosphere. Later, the same alloy composition was ball milled and sintered at 1000 °C by avoiding liquid to δ-ferrite in the system. In the current study, the comparative analysis led by DICTRA simulation indicates that kappa (κ) carbide has difficulty forming in the present alloy system when δ-ferrite is already available, particularly during solidification casting.