Per: SUZANE DE SANT'ANA OLIVEIRA (IME - Instituto MILITAR DE ENGENHARIA), Karollyne Gomes de Castro Monsores (IME - Instituto militar de engenharia), Anderson Oliveira da Silva (IME - INSTITUTO MILITAR DE ENGENHARIA), Géssica da Silva Nicolau (IME - INSTITUTO MILITAR DE ENGENHARIA), Ricardo Pondé Weber (IME - INSTITUTO MILITAR DE ENGENHARIA)
Abstract:
Ballistic armors must meet the following criteria: protection, firepower, mobility and transportability. To achieve the necessary properties to meet these criteria, metallic materials can be subjected to tempering and tempering, which allow excellent hardness without loss of toughness. To conciliate these properties in armor is of fundamental importance, since the hardness is responsible for the break of the projectile tip and the toughness for the absorption of the shock and the energy of impact. As the energy absorption is a fundamental property for the shielding, the objective of this work was to evaluate, by means of the Charpy impact test, the amount of energy absorbed in an HHA steel per cm2 at room temperature (~25 ° C), 0 ° C, -10 ° C, -40 ° C and -70 °, in addition to performing an analysis of the fracture surface of the specimens. The results show that the ambient temperature, the HHA steel, presented a great absorption of energy.