Impact testing to evaluate the toughness of ultra-high hardness steel for ballistic applications

Authors

  • Charles Hudson Martins de Vasconcelos Instituto Militar de Engenharia
  • CRISTHIAN RICARDO LOAYZA LOAYZA Universidade Federal do Pará
  • ADEMIR ÂNGELO CASTRO FILHO Universidade Federal do Pará
  • EDUARDO DE MAGALHÃES BRAGA Universidade Federal do Pará
  • ANDERSAN DOS SANTOS PAULA Instituto Militar de Engenharia
  • RICARDO PONDÉ WEBER Instituto Militar de Engenharia

DOI:

https://doi.org/10.22491/rmct.v40i3.11270.pt

Keywords:

toughness, ductile-brittle transition temperature, impact testing, ultrahigh hardness steel

Abstract

Ultra-high hardness armor grade steels are commonly used in sectors such as patrol vehicles, cash-in-transit vehicles, armored personnel carriers, building protection, among others. The aim of this work was to evaluate the toughness of a material in this class by determining the ductile-to-brittle transition temperature (DBTT) using some of its definitions. Charpy impact tests were conducted and the fracture faces of the specimens were evaluated through both macroscopic and microscopic analysis. The tests were conducted at temperatures ranging from -60°C to room temperature, using specimens extracted longitudinally to the rolling direction. Micrographic analyses indicated that determining the DBTT using the energy absorption criterion is appropriate and reliable. The obtained results show that, based on an absorbed energy of 12.92 J, the transition temperature is -27.73°C.

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Published

2026-02-18

How to Cite

Vasconcelos, C. H. M. de, RICARDO LOAYZA LOAYZA, C., ÂNGELO CASTRO FILHO, A., DE MAGALHÃES BRAGA, E., DOS SANTOS PAULA, A., & PONDÉ WEBER, R. (2026). Impact testing to evaluate the toughness of ultra-high hardness steel for ballistic applications. Revista Militar De Ciência E Tecnologia, 40(3). https://doi.org/10.22491/rmct.v40i3.11270.pt