Microstructure control of E21 Fe3AlC - Bcc ferrite dual phase alloy and its mechanical properties

Hiroaki Ishii, Megumi Kitamoto, Seiji Miura, Kenji Ohkubo, Tetsuo Mohri

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

E21 Fe3AlC carbide (κ) in the Fe-Al-C ternary system is known to have superior strength and limited ductility at room temperature. It forms a lamellar structure similar to the pearlite with a ferrite (α) phase through a eutectoid-likc reaction from an austenite (γ) phase and improved mechanical properties were found by replacing cementite to κ phase. In this study, investigated were the effects of γ grain size and plastic pre-deformation of γ on the eutectoid-like reaction to improve the process time for the decomposition, and the mechanical properties of those specimens at ambient and elevated temperatures. In both the fine y specimen and the cold-rolled specimen, the transformation of γ to α+κ is faster than that in the coarse y specimen. The mean inter-lamellar spacing of α+κ dual phase structure of cold-rollcd specimen aged at 973K is almost the same with that of fine γ specimen aged at 973K. At room temperature, it was found that compressive yield stress depends only on the mean inter-lamellar spacing. This implied that the yield stress of α+κ dual phase alloys is governed by the mean inter-lamellar spacing, like pearlite steels. Creep-like deformation behavior was also observed at elevated temperatures.

Original languageEnglish
Title of host publicationProceedings of the 17th IFHTSE Congress
PublisherThe Japan Society for Heat Treatment (JSHT)
Pages514-517
Number of pages4
ISBN (Electronic)9780000000002
Publication statusPublished - 2008 Jan 1
Event17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008 - Kobe, Japan
Duration: 2008 Oct 262008 Oct 28

Publication series

NameProceedings of the 17th IFHTSE Congress
Volume2

Other

Other17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008
CountryJapan
CityKobe
Period08/10/2608/10/28

Keywords

  • Compression test
  • Heat treatment
  • Intermetallic compound
  • Lamellar structure
  • Pre-deformation

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Condensed Matter Physics
  • Mechanics of Materials

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