放射光高エネルギー X 線・中性子回折と共焦点レーザー走査型顕微鏡:バルクナノ結晶金属のその場特性評価技術1

Translated title of the contribution: Synchrotron High-Energy X-ray & Neutron Diffraction, and Laser-Scanning Confocal Microscopy: In-Situ Characterization Techniques for Bulk Nanocrystalline Metals

Megumi Kawasaki, Jae Kyung Han, Xiaojing Liu, Suk Chun Moon, Klaus Dieter Liss

Research output: Contribution to journalReview articlepeer-review

Abstract

This report is aimed at giving an overview of the significance of the novel and innovative microstructural and microscopic characterization techniques for bulk nanostructured metals processed by severe plastic deformation, specifically high-pressure torsion(HPT). In practice, the microstructural relaxation behavior upon heating of nanostructured 316L stainless steel and CoCrFeNi high-entropy alloy was characterized by in-situ heating neutron diffraction measurements; the heterogeneous phase distribution of an HPT-bonded hetero-nanostructured Al-Mg alloy was examined using synchrotron high-energy X-ray diffraction; and the microstructural evolution upon heating of a nanostructured CoCrFeNiMn high-entropy alloy was examined by laser-scanning confocal microscopy. These novel techniques are complementary to each other and any other in- or ex-situ testing methods, especially when nanocrystalline metals are transforming microstructurally and compositionally with temperature and time in a hierarchical manner. The outcomes of the studies emphasize the importance of the methodologies and the development of characterization techniques for further in-depth exploration in the research field of severe plastic deformation.

Translated title of the contributionSynchrotron High-Energy X-ray & Neutron Diffraction, and Laser-Scanning Confocal Microscopy: In-Situ Characterization Techniques for Bulk Nanocrystalline Metals
Original languageUndefined/Unknown
Pages (from-to)93-105
Number of pages13
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume89
Issue number1
DOIs
StatePublished - 2025
Externally publishedYes

Keywords

  • high-pressure torsion
  • laser-scanning confocal microscopy
  • nanocrystalline metals
  • neutron diffraction
  • synchrotron high-energy X-rays

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