Conditions for grain boundary bulging during tempering of lath martensite in ultra-low carbon steel

Toshihiro Tsuchiyma, Masahide Natori, Nobuo Nakada, Setsuo Takaki

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

A study was conducted to investigate conditions for grain boundary bulging during tempering of lath martensite in ultra-low carbon steel. The conditions for grain boundary bulging was discussed in terms of the mobility of grain boundary and the driving force for grain boundary migration. An ultra-low carbon steel with a chemical composition of Fe-1 .55Mn-O.OO2Si-O.0 1 P-0.0 I 5S-0.009C--O.0029N-0.0015B was used to conduct the investigations. Manganese (Mn) and boron (B) were added to obtain fully lath martensitic structure by enhancing the quench hardenability. The ingot produced by induction melting in an Ar gas atmosphere was homogenized at 1 473 K for 18 ks and hot-roiled to 50% reduction in thickness at 1 273 K. The microstructure was observed with an optical microscope (OM) and the distribution of the crystallographic orientation in the microstructure was examined by the electron back scattering diffraction (EBSD) method with a field-emission scanning electron microscope.

Original languageEnglish
Pages (from-to)771-773
Number of pages3
Journalisij international
Volume50
Issue number5
DOIs
Publication statusPublished - Jul 26 2010

Fingerprint

Low carbon steel
Tempering
Martensite
Grain boundaries
Microstructure
Boron
Manganese
Ingots
Field emission
Melting
Microscopes
Electron microscopes
Diffraction
Gases
Scattering
Scanning
Electrons
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Conditions for grain boundary bulging during tempering of lath martensite in ultra-low carbon steel. / Tsuchiyma, Toshihiro; Natori, Masahide; Nakada, Nobuo; Takaki, Setsuo.

In: isij international, Vol. 50, No. 5, 26.07.2010, p. 771-773.

Research output: Contribution to journalArticle

Tsuchiyma, Toshihiro ; Natori, Masahide ; Nakada, Nobuo ; Takaki, Setsuo. / Conditions for grain boundary bulging during tempering of lath martensite in ultra-low carbon steel. In: isij international. 2010 ; Vol. 50, No. 5. pp. 771-773.
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