Publication: Thermo-mechanical behaviour of TRIP 1000 steel sheets subjected to low velocity perforation by conical projectiles at different temperatures
Loading...
Identifiers
Publication date
2010-05-01
Defense date
Advisors
Tutors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Impact
Export
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.
Description
17 pages, 36 figures.
"Dedicated to Professor Wojciech Nowacki, director of IPPT, who passed away on August 14, 2009".
"Dedicated to Professor Wojciech Nowacki, director of IPPT, who passed away on August 14, 2009".
Keywords
Martensitic transformation, Sheet steel, Perforation, Dynamic plasticity, Dynamic failure
Bibliographic citation
International Journal of Solids and Structures, 2010, vol. 47, n. 9, p. 1268-1284