TY - JOUR
T1 - Effect of martensite fraction on tensile properties of dual-phase steels
AU - Hasegawa, Kohei
AU - Toji, Yuki
AU - Minami, Hidekazu
AU - Ikeda, Hiroshi
AU - Morikawa, Tatsuya
AU - Higashida, Kenji
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2012
Y1 - 2012
N2 - Effects of martensite fraction on tensile properties and inhomogeneous deformation of microstructures in dual-phase steels have been investigated by TEM, SEM-EBSD and strain mapping using high-precision grid markers drawn by electron beam lithography. As is well known, when volume fraction of martensite is increased from 25% to 75%, yield and tensile strengths markedly increase while elongation decreases. It was found by EBSD that the average value of kernel average misorientation in ferrite increase with martensite fraction. Strain mapping using the marker method showed that both equivalent plastic strains of ferrite and martensite increase with martensite fraction, where it is to be noted that the strain increase of martensite is larger than that of ferrite, suggesting that the stress redistribution between ferrite and martensite is enhanced with increasing the martensite fraction.
AB - Effects of martensite fraction on tensile properties and inhomogeneous deformation of microstructures in dual-phase steels have been investigated by TEM, SEM-EBSD and strain mapping using high-precision grid markers drawn by electron beam lithography. As is well known, when volume fraction of martensite is increased from 25% to 75%, yield and tensile strengths markedly increase while elongation decreases. It was found by EBSD that the average value of kernel average misorientation in ferrite increase with martensite fraction. Strain mapping using the marker method showed that both equivalent plastic strains of ferrite and martensite increase with martensite fraction, where it is to be noted that the strain increase of martensite is larger than that of ferrite, suggesting that the stress redistribution between ferrite and martensite is enhanced with increasing the martensite fraction.
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U2 - 10.2355/tetsutohagane.98.320
DO - 10.2355/tetsutohagane.98.320
M3 - Article
AN - SCOPUS:84862236576
SN - 0021-1575
VL - 98
SP - 320
EP - 327
JO - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
JF - Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
IS - 6
ER -