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
Country/TerritoryJapan
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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