Dynamic Tensile Characteristics of TRIP-type and DP-type Sheets for an Auto-body

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This paper investigates the dynamic tensile characteristics of TRIP600, TRIP800, DP600 and DP800 at the range of strain rate from 0.003 to 200/s. The tensile test acquires stressstrain curves and the strain rate sensitivity of each material. Experimental results show two important aspects for TRIP-type and DP-type sheets quantitatively: the flow stress increases as the strain rate increases; the elongation is not a monotonic function of the strain rate and increases at the same level of the strain rate even when the strain rate increases. In order to investigate the pre-strain effect for two types of metals at the high strain rate, TRIP600 and DP600 were elongated with the pre-strain of 5 and 10% at the strain rate of 0.003/s. Then, dynamic tensile tests were carried out at the strain rate of 0.003, 1, 10 and 100/s. The results demonstrate that the material properties of TRIP600 and DP600 are noticeably influenced by the pre-strain when the strain rate was over 1/s. The ultimate tensile strength as well as the yield stress increases due to the pre-strain effect.
Publisher
Trans Tech Publications
Issue Date
2007-01-09
Description

AEPA 2006, Nagoya, Japan, pp.255~262, 2006.

Keywords

TRIP-type sheets; DP-type sheets; Strain rate; Dynamic tensile characteristics; Pre-strain effect

Citation

Key Engineering Materials Vols. 340-341 (2007) pp. 255-262

ISSN
1013-9826
URI
http://hdl.handle.net/10203/3295
Link
http://www.scientific.net/0-87849-433-2/255/
Appears in Collection
ME-Conference Papers(학술회의논문)

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