Four-dimensional observation of ductile fracture in sintered iron using synchrotron X-ray laminography

Yukiko Ozaki, Y. Mugita, Masatoshi Aramaki, O. Furukimi, Satoshi Oue, F. Jiang, Takeshi Tsuji, A. Takeuchi, M. Uesugi, K. Ashizuka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Synchrotron X-ray laminography was used to examine the time-dependent evolution of the three-dimensional (3D) morphology of micropores in sintered iron during the tensile test. 3D snapshots showed that the networked open pores grow wider than 20 µm along the tensile direction, resulting in the internal necking of the specimen. Subsequently, these pores initiated the cracks perpendicular to the tensile direction by coalescing with the surrounding pre-existing microvoids or with the secondary-generated voids immediately before fracture. Topological analysis of the barycentric positions of these microvoids showed that they form the two-dimensional networks within the ∼20 µm of radius area. These observations strongly indicate that the microvoid coalescence could occur on shear planes formed close to the enlarged open pores or between closed pores by strain accumulation and play an important role in the crack initiation.

Original languageEnglish
Pages (from-to)146-154
Number of pages9
JournalPowder Metallurgy
Volume62
Issue number2
DOIs
Publication statusPublished - Mar 15 2019

Fingerprint

Ductile fracture
Synchrotrons
Coalescence
Crack initiation
synchrotrons
Iron
Cracks
porosity
iron
X rays
coalescing
x rays
crack initiation
tensile tests
voids
cracks
shear
radii
Direction compound

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Four-dimensional observation of ductile fracture in sintered iron using synchrotron X-ray laminography. / Ozaki, Yukiko; Mugita, Y.; Aramaki, Masatoshi; Furukimi, O.; Oue, Satoshi; Jiang, F.; Tsuji, Takeshi; Takeuchi, A.; Uesugi, M.; Ashizuka, K.

In: Powder Metallurgy, Vol. 62, No. 2, 15.03.2019, p. 146-154.

Research output: Contribution to journalArticle

Ozaki, Yukiko ; Mugita, Y. ; Aramaki, Masatoshi ; Furukimi, O. ; Oue, Satoshi ; Jiang, F. ; Tsuji, Takeshi ; Takeuchi, A. ; Uesugi, M. ; Ashizuka, K. / Four-dimensional observation of ductile fracture in sintered iron using synchrotron X-ray laminography. In: Powder Metallurgy. 2019 ; Vol. 62, No. 2. pp. 146-154.
@article{d7e02aebcc0a45649b20d083ccc5272d,
title = "Four-dimensional observation of ductile fracture in sintered iron using synchrotron X-ray laminography",
abstract = "Synchrotron X-ray laminography was used to examine the time-dependent evolution of the three-dimensional (3D) morphology of micropores in sintered iron during the tensile test. 3D snapshots showed that the networked open pores grow wider than 20 µm along the tensile direction, resulting in the internal necking of the specimen. Subsequently, these pores initiated the cracks perpendicular to the tensile direction by coalescing with the surrounding pre-existing microvoids or with the secondary-generated voids immediately before fracture. Topological analysis of the barycentric positions of these microvoids showed that they form the two-dimensional networks within the ∼20 µm of radius area. These observations strongly indicate that the microvoid coalescence could occur on shear planes formed close to the enlarged open pores or between closed pores by strain accumulation and play an important role in the crack initiation.",
author = "Yukiko Ozaki and Y. Mugita and Masatoshi Aramaki and O. Furukimi and Satoshi Oue and F. Jiang and Takeshi Tsuji and A. Takeuchi and M. Uesugi and K. Ashizuka",
year = "2019",
month = "3",
day = "15",
doi = "10.1080/00325899.2019.1585032",
language = "English",
volume = "62",
pages = "146--154",
journal = "Powder Metallurgy",
issn = "0032-5899",
publisher = "Maney Publishing",
number = "2",

}

TY - JOUR

T1 - Four-dimensional observation of ductile fracture in sintered iron using synchrotron X-ray laminography

AU - Ozaki, Yukiko

AU - Mugita, Y.

AU - Aramaki, Masatoshi

AU - Furukimi, O.

AU - Oue, Satoshi

AU - Jiang, F.

AU - Tsuji, Takeshi

AU - Takeuchi, A.

AU - Uesugi, M.

AU - Ashizuka, K.

PY - 2019/3/15

Y1 - 2019/3/15

N2 - Synchrotron X-ray laminography was used to examine the time-dependent evolution of the three-dimensional (3D) morphology of micropores in sintered iron during the tensile test. 3D snapshots showed that the networked open pores grow wider than 20 µm along the tensile direction, resulting in the internal necking of the specimen. Subsequently, these pores initiated the cracks perpendicular to the tensile direction by coalescing with the surrounding pre-existing microvoids or with the secondary-generated voids immediately before fracture. Topological analysis of the barycentric positions of these microvoids showed that they form the two-dimensional networks within the ∼20 µm of radius area. These observations strongly indicate that the microvoid coalescence could occur on shear planes formed close to the enlarged open pores or between closed pores by strain accumulation and play an important role in the crack initiation.

AB - Synchrotron X-ray laminography was used to examine the time-dependent evolution of the three-dimensional (3D) morphology of micropores in sintered iron during the tensile test. 3D snapshots showed that the networked open pores grow wider than 20 µm along the tensile direction, resulting in the internal necking of the specimen. Subsequently, these pores initiated the cracks perpendicular to the tensile direction by coalescing with the surrounding pre-existing microvoids or with the secondary-generated voids immediately before fracture. Topological analysis of the barycentric positions of these microvoids showed that they form the two-dimensional networks within the ∼20 µm of radius area. These observations strongly indicate that the microvoid coalescence could occur on shear planes formed close to the enlarged open pores or between closed pores by strain accumulation and play an important role in the crack initiation.

UR - http://www.scopus.com/inward/record.url?scp=85062549428&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85062549428&partnerID=8YFLogxK

U2 - 10.1080/00325899.2019.1585032

DO - 10.1080/00325899.2019.1585032

M3 - Article

VL - 62

SP - 146

EP - 154

JO - Powder Metallurgy

JF - Powder Metallurgy

SN - 0032-5899

IS - 2

ER -