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

Y. Ozaki, Y. Mugita, M. Aramaki, Osamu Furukimi, S. Oue, F. Jiang, T. Tsuji, A. Takeuchi, M. Uesugi, K. Ashizuka

研究成果: Contribution to journalArticle査読

1 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)146-154
ページ数9
ジャーナルPowder Metallurgy
62
2
DOI
出版ステータス出版済み - 3 15 2019

All Science Journal Classification (ASJC) codes

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

フィンガープリント 「Four-dimensional observation of ductile fracture in sintered iron using synchrotron X-ray laminography」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル