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NanoMat 2018
Nano Research & Applications
ISSN: 2471-9838
Page 86
April 26-27, 2018
Rome, Italy
17
th
Edition of International Conference on
Emerging Trends in
Materials Science and
Nanotechnology
Nano Res Appl, Volume:4
DOI: 10.21767/2471-9838-C1-009
D
ual phase steel is widely used in manufacturing for its
excellent combination of strength with plasticity. Previously,
much attention has been paid in the strengthening mechanism of
dual phase steel and a great deal of papers have been published
while the plastic deformation mechanism has not been further
discussed. In this paper, combining the nanoindentation test with
finite element modeling the single phase constitutive equations
of dual phase steel was established. To solve the P-h curve,
reverse analysis algorithms and five dimensionless function
are adopted. In addition, the nanoindentation is simulated by
ABAQUS to validate the accuracy of numerical calculation. A
representative stress and corresponding representative strain
are solved by dimensionless functions and updated with finite
element modeling. Forty nanoindentation sites are tested and
simulated to investigate the impact of friction and tip shape of
indenter in modeling. Finally, we will give a complete method of
solving constitutive relation from nanoindentation and provide a
theoretical basis for the further study of dual phase steel’s plastic
behavior. The constitutive relation of ferrite and martensite are
completed, which reveals the average yield stress and strain
hardening index of martensite and ferrite are 830.06MPa, 0.182,
360.34MPa, 0.226 respectively. For complete martensite steel,
the yield stress and strain hardening index are 1352.85MPa and
0.130. The uniaxial tensile results are 416.81MPa and 0.2.
haoleiwork@gmail.comThe single phase constitutive relation of dual phase steel
based on nanoindentation test and finite element modeling
HAO Lei-lei
1
, GUO Cheng-yu
1
, KANG Yong-lin
1
, LI Sheng-ci
2
,
and
He Bai-zhi
2
1
University of Science and Technology Beijing, China
2
Jiangxi University of Science and Technology, China