Alloying effect on reverse transformation from tempered martensite

Goro Miyamoto, Hirokazu Usuki, Zhao Dong Li, Tadashi Furuhara

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

Abstract

Effects of lmass% Si, Mn and Cr addition on kinetics of reverse transformation at 1073K from tempered high carbon martensite structure were investigated. In all the alloys, austenite nucleates at cementite particles and grows accompanying with dissolving cementite. Hardness increases with proceeding of reverse transformation. The rate for reverse transformation is fastest in the Fe-0.6C binary alloy and becomes slower by the addition of Mn, Si and Cr. In particular, retarding effect in the Cr alloy is significant and holding time three orders of magnitude longer than the other alloys is necessary to complete reverse transformation. In Si and Mn-added alloys, austenite growth is controlled by carbon diffusion as well as in the Fe-0.6C alloy. On the other hand, in Cr-added alloy, long range diffusion of Cr diffusion is necessary for austenite growth, causing extremely sluggish reaction rate.

Original languageEnglish
Title of host publicationProceedings of the 17th IFHTSE Congress
PublisherThe Japan Society for Heat Treatment (JSHT)
Pages482-485
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

  • Austenite
  • Cementite
  • Kinetics
  • Martensite
  • Reverse transformation

ASJC Scopus subject areas

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

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