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Formation of ultrafine grained ferrite by warm deformation of lath martensite in low-alloy steels with different carbon content

Authors
Journal
Scripta Materialia
1359-6462
Publisher
Elsevier
Publication Date
Volume
59
Issue
3
Identifiers
DOI: 10.1016/j.scriptamat.2008.03.041
Keywords
  • Thermomechanical Processing
  • Grain Refining
  • Lath Martensite
  • Dynamic Recrystallization

Abstract

Formation of ultrafine grained ferrite by warm deformation of tempered lath martensite was investigated in Fe–2Mn–(0.1–0.8)C (mass%) alloys. Analysis of initial microstructure shows that an increase in carbon content leads to a decrease of lath martensite block size. Fine equiaxed (α) grains surrounded by high-angle boundaries are formed by dynamic recrystallization. As carbon content increases, the recrystallized α grain size decreases. It is considered that dynamic recrystallization of tempered lath martensite is a continuous type.

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