Multi-scale deformation behavior for multi-layered steel by in-situ FE-SEM

Y. Tanaka, S. Kishimoto, F. Yin, M. Kobayashi, Toru Tomimatsu, K. Kagawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The multi-scale deformation behavior of multi-layered steel during tensile loading was investigated by in-situ FE-SEM observation coupled with multi-scale pattern. The material used was multi-layered steel sheet consisting of martensitic and austenitic stainless steel layers. Prior to in-situ tensile testing, the multi-scale pattern combined with a grid and random dots were fabricated by electron beam lithography on the polished surface in the area of 1 mm2 to facilitate direct observation of multi-scale deformation. Both of the grids with pitches of 10 μm and a random speckle pattern ranging from 200 nm to a few μm sizes were drawn onto the specimen surface at same location. The electron moiré method was applied to measure the strain distribution in the deformed specimens at a millimeter scale and digital images correlation method was applied to measure the in-plane deformation and strain distribution at a micron meter scale acquired before and after at various increments of straining. The results showed that the plastic deformation in the austenitic stainless steel layer was larger than the martensitic steel layer at millimeter scale. However, heterogeneous intrinsic grain-scale plastic deformation was clearly observed and it increased with increasing the plastic deformation.

Original languageEnglish
Title of host publicationFourth International Conference on Experimental Mechanics
DOIs
Publication statusPublished - 2010 Dec 1
Event4th International Conference on Experimental Mechanics - Singapore, Singapore
Duration: 2009 Nov 182009 Nov 20

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7522
ISSN (Print)0277-786X

Other

Other4th International Conference on Experimental Mechanics
Country/TerritorySingapore
CitySingapore
Period09/11/1809/11/20

Keywords

  • In-situ FE-SEM observation
  • Multi-layered steel
  • Multi-scale pattern

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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