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Phase Analysis on Dual-Phase Steel Using Band Slope of Electron Backscatter Diffraction Pattern

Published online by Cambridge University Press:  06 August 2013

Jun-Yun Kang ,
Seong-Jun Park  and
Man-Been Moon
Jun-Yun Kang*
Affiliation:
Ferrous Alloy Department, Korea Institute of Materials Science, 797 Changwon-daero, Changwon, Gyeongsangnam-do 641-831, Republic of Korea
Seong-Jun Park
Affiliation:
Automotive Steel R&D Team, Hyundai HYSCO Dangjin Works, 313 Donggok, Dangjin, Chungcheongnam-do 343-831, Republic of Korea
Man-Been Moon
Affiliation:
Automotive Steel R&D Team, Hyundai HYSCO Dangjin Works, 313 Donggok, Dangjin, Chungcheongnam-do 343-831, Republic of Korea
*
*Corresponding author. E-mail: firice@kims.re.kr
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Abstract

A quantitative and automated phase analysis of dual-phase (DP) steel using electron backscatter diffraction (EBSD) was attempted. A ferrite–martensite DP microstructure was produced by intercritical annealing and quenching. An EBSD map of the microstructure was obtained and post-processed for phase discrimination. Band slope (BS), which was a measure of pattern quality, exhibited much stronger phase contrast than another conventional one, band contrast. Owing to high sensitivity to lattice defect and little orientation dependence, BS provided handiness in finding a threshold for phase discrimination. Its grain average gave a superior result on the discrimination and volume fraction measurement of the constituent phases in the DP steel.

Keywords

phase analysiselectron backscatter diffractionpattern qualityband slopedual-phase steelmartensite
Type
Research Article
Information
Microscopy and Microanalysis , Volume 19 , Supplement S5: IUMAS , August 2013 , pp. 13 - 16
Copyright
Copyright © Microscopy Society of America 2013 

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