Phase Identification of Dual-Phase (DP980) Steels by Electron Backscatter Diffraction and Nanoindentation Techniques

Fan Zhang, Annie Ruimi, David P. Field

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Phase identification of multi-phase materials provides essential information relating the material to its mechanical properties. In this study we selected DP980, a type of dual-phase steel, to investigate the content of martensite and ferrite grains. A combination of advanced techniques was used to provide detailed and precise information of the microstructure. Scanning and transmission electron microscopy were used to provide observations of the sample surface at different scales. Martensite and ferrite phases of DP980 were further identified and characterized using electron backscatter diffraction and scanning probe microscopy. Results obtained with nanoindentation tests confirmed that the differences in nanohardness values in single-phase grains are martensite and ferrite with different surface heights shown by scanning probe microscopy. The similarity shown in the image quality map and scanning probe microscopy proves that a large fraction of martensite can be distinguished in this undeformed material using image quality parameters obtained during electron backscatter diffraction imaging.

Original languageEnglish
Pages (from-to)99-107
Number of pages9
JournalMicroscopy and Microanalysis
Volume22
Issue number1
DOIs
Publication statusPublished - 1 Feb 2016

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Keywords

  • dual-phase steel
  • electron backscatter diffraction
  • image quality
  • martensite identification
  • nanoindentation

ASJC Scopus subject areas

  • Instrumentation

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