Imperial College London
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DrNanLi

Faculty of Engineering, Dyson School of Design Engineering

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 8853n.li09 Website

 
 
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Location

 

1M03Royal College of ScienceSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Li:2015:10.1016/j.jmatprotec.2015.09.043,
author = {Li, N and Sun, C and Guo, N and Mohamed, M and Lin, J and Matsumoto, T and Liu, C},
doi = {10.1016/j.jmatprotec.2015.09.043},
journal = {Journal of Materials Processing Technology},
pages = {2--10},
title = {Experimental investigation of boron steel at hot stamping conditions},
url = {http://dx.doi.org/10.1016/j.jmatprotec.2015.09.043},
volume = {228},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The effect of deformation temperature and strain rate on the fracture and strain hardening of boron steel was investigated through the analysis of large amount of experimental data tested using a Gleeble (3800) materials simulator. These features were further modelled by using a set of unified viscoplastic damage constitutive equations. To study the deformation behavior, isothermal uniaxial tension tests of 1500 MPa boron steel at different strain rates of 0.01–5.0 s−1 and different deformation temperatures of 550–850 °C were performed on a Gleeble 3800 materials simulator. Considering the difference between the deformation of the necking cross section and the centre measuring cross section of specimen at necking stage, a correction method of measuring strain at the necking cross section was developed. In addition, by taking temperature rise during deformation into account, a correction method of measuring stress was proposed. The true stress-strain curves were obtained based on the two corrections methods. The influence of deformation temperature and strain rate on the fracture and hardening was analyzed. A set of unified constitutive equations was adopted and determined from experimental data. The correlation between the numerical-computed and experimental true stress-strain data is presented. The average relative error is within the range of allowable experimental conditions and the predicted and experimental values can almost be consistent.
AU  - Li,N
AU  - Sun,C
AU  - Guo,N
AU  - Mohamed,M
AU  - Lin,J
AU  - Matsumoto,T
AU  - Liu,C
DO  - 10.1016/j.jmatprotec.2015.09.043
EP  - 10
PY  - 2015///
SN  - 0924-0136
SP  - 2
TI  - Experimental investigation of boron steel at hot stamping conditions
T2  - Journal of Materials Processing Technology
UR  - http://dx.doi.org/10.1016/j.jmatprotec.2015.09.043
UR  - http://hdl.handle.net/10044/1/30162
VL  - 228
ER  -
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