Voids nucleation and growth examination during tensile deformation for IF steel by synchrotron X-ray laminography and EBSD

Osamu Furukimi, Yuji Takeda, Masayuki Yamamoto, Masatoshi Aramaki, Shinji Munetoh, Akihisa Takeuchi, Hirofumi Ide, Morihiko Nakasaki

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The mechanism behind the large elongation of Ti-added interstitial free (IF) steel has been investigated from the view point of voids’ nucleation, growth and coalescence in a local elongation region of tensile tests. Electron back scatter diffraction showed that in the case of IF steel, 50% of the voids nucleated at grain boundaries, 20% nucleated at Ti (C, N) on grain boundaries, 30% nucleated at Ti (C, N) in matrix. In the case of industrial pure iron, 70% of the voids nucleated at large angle grain boundaries while 30% nucleated at non-recrystallized grain boundaries. Synchrotron X-ray Laminograph observation showed that the voids in the IF steel grew, however, the coalescence was suppressed until a large plastic strain as compared with the pure industrial iron. Nano-indentation hardness (HIT) was measured when the tensile test stopped at a maximum load. This result showed that HIT at the grain boundaries of the industrial pure iron largely increased during tensile tests as compared with the IF steel. This finding was an indication that the industrial pure iron has heterogeneity of strain near grain boundaries previously in the region of uniform deformation. This finding also suggested that the large local elongation in the IF steel is caused by lowering heterogeneity of strain in the uniform deformation region followed by the suppression of voids’ growth and coalescence in the local elongation region.

Original languageEnglish
Pages (from-to)475-482
Number of pages8
JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
Volume103
Issue number8
DOIs
Publication statusPublished - Jan 1 2017

Fingerprint

tensile deformation
Steel
Synchrotrons
voids
interstitials
synchrotrons
Grain boundaries
Nucleation
grain boundaries
examination
nucleation
steels
X rays
elongation
Elongation
Iron
tensile tests
Coalescence
coalescing
iron

All Science Journal Classification (ASJC) codes

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

Cite this

Voids nucleation and growth examination during tensile deformation for IF steel by synchrotron X-ray laminography and EBSD. / Furukimi, Osamu; Takeda, Yuji; Yamamoto, Masayuki; Aramaki, Masatoshi; Munetoh, Shinji; Takeuchi, Akihisa; Ide, Hirofumi; Nakasaki, Morihiko.

In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan, Vol. 103, No. 8, 01.01.2017, p. 475-482.

Research output: Contribution to journalArticle

Furukimi, Osamu ; Takeda, Yuji ; Yamamoto, Masayuki ; Aramaki, Masatoshi ; Munetoh, Shinji ; Takeuchi, Akihisa ; Ide, Hirofumi ; Nakasaki, Morihiko. / Voids nucleation and growth examination during tensile deformation for IF steel by synchrotron X-ray laminography and EBSD. In: Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan. 2017 ; Vol. 103, No. 8. pp. 475-482.
@article{beb880009f844720b71eff91a6da6dae,
title = "Voids nucleation and growth examination during tensile deformation for IF steel by synchrotron X-ray laminography and EBSD",
abstract = "The mechanism behind the large elongation of Ti-added interstitial free (IF) steel has been investigated from the view point of voids’ nucleation, growth and coalescence in a local elongation region of tensile tests. Electron back scatter diffraction showed that in the case of IF steel, 50{\%} of the voids nucleated at grain boundaries, 20{\%} nucleated at Ti (C, N) on grain boundaries, 30{\%} nucleated at Ti (C, N) in matrix. In the case of industrial pure iron, 70{\%} of the voids nucleated at large angle grain boundaries while 30{\%} nucleated at non-recrystallized grain boundaries. Synchrotron X-ray Laminograph observation showed that the voids in the IF steel grew, however, the coalescence was suppressed until a large plastic strain as compared with the pure industrial iron. Nano-indentation hardness (HIT) was measured when the tensile test stopped at a maximum load. This result showed that HIT at the grain boundaries of the industrial pure iron largely increased during tensile tests as compared with the IF steel. This finding was an indication that the industrial pure iron has heterogeneity of strain near grain boundaries previously in the region of uniform deformation. This finding also suggested that the large local elongation in the IF steel is caused by lowering heterogeneity of strain in the uniform deformation region followed by the suppression of voids’ growth and coalescence in the local elongation region.",
author = "Osamu Furukimi and Yuji Takeda and Masayuki Yamamoto and Masatoshi Aramaki and Shinji Munetoh and Akihisa Takeuchi and Hirofumi Ide and Morihiko Nakasaki",
year = "2017",
month = "1",
day = "1",
doi = "10.2355/tetsutohagane.TETSU-2017-011",
language = "English",
volume = "103",
pages = "475--482",
journal = "Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan",
issn = "0021-1575",
publisher = "一般社団法人 日本鉄鋼協会",
number = "8",

}

TY - JOUR

T1 - Voids nucleation and growth examination during tensile deformation for IF steel by synchrotron X-ray laminography and EBSD

AU - Furukimi, Osamu

AU - Takeda, Yuji

AU - Yamamoto, Masayuki

AU - Aramaki, Masatoshi

AU - Munetoh, Shinji

AU - Takeuchi, Akihisa

AU - Ide, Hirofumi

AU - Nakasaki, Morihiko

PY - 2017/1/1

Y1 - 2017/1/1

N2 - The mechanism behind the large elongation of Ti-added interstitial free (IF) steel has been investigated from the view point of voids’ nucleation, growth and coalescence in a local elongation region of tensile tests. Electron back scatter diffraction showed that in the case of IF steel, 50% of the voids nucleated at grain boundaries, 20% nucleated at Ti (C, N) on grain boundaries, 30% nucleated at Ti (C, N) in matrix. In the case of industrial pure iron, 70% of the voids nucleated at large angle grain boundaries while 30% nucleated at non-recrystallized grain boundaries. Synchrotron X-ray Laminograph observation showed that the voids in the IF steel grew, however, the coalescence was suppressed until a large plastic strain as compared with the pure industrial iron. Nano-indentation hardness (HIT) was measured when the tensile test stopped at a maximum load. This result showed that HIT at the grain boundaries of the industrial pure iron largely increased during tensile tests as compared with the IF steel. This finding was an indication that the industrial pure iron has heterogeneity of strain near grain boundaries previously in the region of uniform deformation. This finding also suggested that the large local elongation in the IF steel is caused by lowering heterogeneity of strain in the uniform deformation region followed by the suppression of voids’ growth and coalescence in the local elongation region.

AB - The mechanism behind the large elongation of Ti-added interstitial free (IF) steel has been investigated from the view point of voids’ nucleation, growth and coalescence in a local elongation region of tensile tests. Electron back scatter diffraction showed that in the case of IF steel, 50% of the voids nucleated at grain boundaries, 20% nucleated at Ti (C, N) on grain boundaries, 30% nucleated at Ti (C, N) in matrix. In the case of industrial pure iron, 70% of the voids nucleated at large angle grain boundaries while 30% nucleated at non-recrystallized grain boundaries. Synchrotron X-ray Laminograph observation showed that the voids in the IF steel grew, however, the coalescence was suppressed until a large plastic strain as compared with the pure industrial iron. Nano-indentation hardness (HIT) was measured when the tensile test stopped at a maximum load. This result showed that HIT at the grain boundaries of the industrial pure iron largely increased during tensile tests as compared with the IF steel. This finding was an indication that the industrial pure iron has heterogeneity of strain near grain boundaries previously in the region of uniform deformation. This finding also suggested that the large local elongation in the IF steel is caused by lowering heterogeneity of strain in the uniform deformation region followed by the suppression of voids’ growth and coalescence in the local elongation region.

UR - http://www.scopus.com/inward/record.url?scp=85026727069&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85026727069&partnerID=8YFLogxK

U2 - 10.2355/tetsutohagane.TETSU-2017-011

DO - 10.2355/tetsutohagane.TETSU-2017-011

M3 - Article

AN - SCOPUS:85026727069

VL - 103

SP - 475

EP - 482

JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan

JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan

SN - 0021-1575

IS - 8

ER -