| Issue |
J. Phys. IV France
Volume 134, August 2006
EURODYMAT 2006 - 8th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading
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|---|---|---|
| Page(s) | 1085 - 1090 | |
| DOI | https://doi.org/10.1051/jp4:2006134166 | |
| Published online | 26 July 2006 | |
J. Cirne, R. Dormeval, et al.
J. Phys. IV France 134 (2006) 1085-1090
DOI: 10.1051/jp4:2006134166
Influence of uniaxial, biaxial and plane strain pre-straining on the dynamic tensile properties of high strength sheet steels
P. Larour1, P. Verleysen2 and W. Bleck11 RWTH Aachen University, Department of Ferrous Metallurgy, 52056 Aachen, Germany
2 Ghent University, Department of Mechanical Construction and Production, Faculty of Engineering, Sint-Pietersnieuwstraat 41, 9000 Gent, Belgium
Published online: 26 July 2006
Abstract
The influence of pre-straining and microstructure on the
dynamic properties of car body high strength steels has been investigated at
room temperature. The mechanical properties of a dual phase steel DP600, a
TRIP steel TRIP700 and an austenitic steel AISI 301LN2B (1.4318) have been
determined performing high speed servohydraulic and split-Hopkinson bar
tensile tests in the strain rate range from 0.005s-1 up to 950s-1. The pre-straining modes and levels, respectively 10% uniaxial,
10% plane strain and 5% biaxial pre-straining, have been chosen in
this investigation according to industrial use. 10% plane strain
pre-straining brings the highest increase of yield and tensile strength
values. 5% biaxial and 10% uniaxial pre-straining have similar effect
on strength properties. The austenitic steel presents a pronounced minimum
for tensile strength values at around 1/s. A combination of adiabatic
heating and exothermic
transformation produces
some significant softening effects in the austenitic steel grade.
© EDP Sciences 2006