Structural variation along thickness direction of extra-low carbon sheet steels rolled in ferrite region

Saiji Matsuoka, Masahiko Morita, Osamu Furukimi, Takashi Obara

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The application of an EBSD technique in an SEM reveals a new approach to analyze a structural variation along the thickness direction of extra-low carbon sheet steels rolled in the ferrite region. The fine recrystallized grains in the sheet steel rolled without lubrication are observed near the surface due to a strong additional shear strain between a material and a roll, and those grains are considered to recrystallize dynamically by means of image-quality imaging with EBSD. The nonuniform recrystallization texture through the thickness are formed in the sheet steel rolled without lubrication by means of orientation imaging with EBSD. 〈110〉//ND recrystallized grains being formed near surface, 〈111〉//ND and 〈100〉//ND recrystallized grains being formed at the mid plane. On the other hand, 〈110〉//ND recrystallized grains are not formed preferentially near surface and 〈111〉//ND and 〈100〉//ND recrystallized grains are formed uniformly throughout the thickness in the sheet steel rolled with lubrication. The orientation imaging also reveals the tolerance of 〈110〉//ND recrystallized grains around 〈111〉//ND axis in the sheet steel rolled without lubrication, resulting in the 〈110〉//ND grains with small tolerance being formed at the 1/10 plane from surface and the 〈110〉//ND grains with larger tolerance being formed at the thickness location toward the surface and center from 1/10 plane. The image-quality imaging orientation imaging allow a more visual and intuitive understanding of the nonuniformity of a microstructure and texture formation in the sheet steel rolled without lubrication than conventional method such as optical microscopy and X-ray diffraction measurements.

Original languageEnglish
Pages (from-to)127-132
Number of pages6
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume83
Issue number2
DOIs
Publication statusPublished - Jan 1 1997

Fingerprint

Steel sheet
Ferrite
ferrites
Carbon
Lubrication
steels
lubrication
carbon
Imaging techniques
Image quality
Textures
Shear strain
textures
Optical microscopy
Direction compound
shear strain
X ray diffraction
nonuniformity
Microstructure
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

Cite this

Structural variation along thickness direction of extra-low carbon sheet steels rolled in ferrite region. / Matsuoka, Saiji; Morita, Masahiko; Furukimi, Osamu; Obara, Takashi.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 83, No. 2, 01.01.1997, p. 127-132.

Research output: Contribution to journalArticle

Matsuoka, Saiji ; Morita, Masahiko ; Furukimi, Osamu ; Obara, Takashi. / Structural variation along thickness direction of extra-low carbon sheet steels rolled in ferrite region. In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan. 1997 ; Vol. 83, No. 2. pp. 127-132.
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