Dynamic Tensile Characteristics of TRIP-Type and DP-Type Sheets for an Auto-Body

Abstract:

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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.

Info:

Periodical:

Key Engineering Materials (Volumes 340-341)

Edited by:

N. Ohno and T. Uehara

Pages:

255-262

DOI:

10.4028/www.scientific.net/KEM.340-341.255

Citation:

S. B. Kim et al., "Dynamic Tensile Characteristics of TRIP-Type and DP-Type Sheets for an Auto-Body", Key Engineering Materials, Vols. 340-341, pp. 255-262, 2007

Online since:

June 2007

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Price:

$35.00

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