Thermo-Mechanical Behaviour of TRIP 1000 Steel Sheets Subjected to Low Velocity Perforation by Conical Projectiles at Different Temperatures Articles uri icon

publication date

  • May 2010

start page

  • 1268

end page

  • 1284

issue

  • 9

volume

  • 47

international standard serial number (ISSN)

  • 0020-7683

electronic international standard serial number (EISSN)

  • 1879-2146

abstract

  • This paper presents and analyzes the behaviour of TRIP 1000 steel sheets subjected to low velocity perforation by conical projectiles. The relevance of this material resides in the potential transformation of
    retained austenite to martensite during impact loading. This process
    leads to an increase in strength and ductility of the material. However,
    this transformation takes place only under certain loading conditions
    strongly dependent on the initial temperature and deformation rate. In
    order to study the material behaviour under impact loading, perforation
    tests have been performed using a drop weight tower. Experiments were
    carried out at two different initial temperatures T0 = 213 K and T0 =
    288 K, and within the range of impact velocities 2.5 m/s ≤ V0 ≤ 4.5 m/s.
    The experimental setup enabled the measuring of impact velocity,
    residual velocity, load-time history and failure mode. In addition, dry
    and lubricated contacts between the striker and the plate have been
    investigated. Finally, by using X-ray diffraction it has been shown that
    no martensitic transformation takes place during the perforation
    process. The causes involving the none-appearance of martensite are
    examined.