論文

査読有り 本文へのリンクあり
2019年12月1日

Microstructural deformation process of shock-compressed polycrystalline aluminum

Scientific Reports
  • Kouhei Ichiyanagi
  • ,
  • Sota Takagi
  • ,
  • Nobuaki Kawai
  • ,
  • Ryo Fukaya
  • ,
  • Shunsuke Nozawa
  • ,
  • Kazutaka G. Nakamura
  • ,
  • Klaus Dieter Liss
  • ,
  • Masao Kimura
  • ,
  • Shin ichi Adachi

9
1
開始ページ
7604
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1038/s41598-019-43876-2

© 2019, The Author(s). Plastic deformation of polycrystalline materials under shock wave loading is a critical characteristic in material science and engineering. However, owing to the nanosecond time scale of the shock-induced deformation process, we currently have a poor mechanistic understanding of the structural changes from atomic scale to mesoscale. Here, we observed the dynamic grain refinement of polycrystalline aluminum foil under laser-driven shock wave loading using time-resolved X-ray diffraction. Diffraction spots on the Debye-Scherrer ring from micrometer-sized aluminum grains appeared and disappeared irregularly, and were shifted and broadened as a result of laser-induced shock wave loading. Behind the front of shock wave, large grains in aluminum foil were deformed, and subsequently exhibited grain rotation and a reduction in size. The width distribution of the diffraction spots broadened because of shock-induced grain refinement and microstrain in each grain. We performed quantitative analysis of the inhomogeneous lattice strain and grain size in the shocked polycrysalline aluminum using the Williamson-Hall method and determined the dislocation density under shock wave loading.

リンク情報
DOI
https://doi.org/10.1038/s41598-019-43876-2
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/31110218
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85065992467&origin=inward 本文へのリンクあり
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85065992467&origin=inward

エクスポート
BibTeX RIS