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Journal of Materials Engineering and Performance

, Volume 27, Issue 3, pp 1281–1295 | Cite as

Weldability and Impact Energy Properties of High-Hardness Armor Steel

  • Aleksandar Cabrilo
  • Katarina Geric
  • Milos Jovanovic
  • Lazic Vukic
Article
  • 125 Downloads

Abstract

In this study, the weldability of high-hardness armor steel by the gas metal arc welding method has been investigated. The study was aimed at determining the weakness points of manual welding compared to automated welding through microhardness testing, the cooling rate, tensile characteristics and nondestructive analysis. Detailed studies were performed for automated welding on the impact energy and microhardness in the fusion line, as the most sensitive zone of the armor steel weld joint. It was demonstrated that the selection of the preheating and interpass temperature is important in terms of the cooling rate and quantity of diffusible and retained hydrogen in the weld joint. The tensile strength was higher than 800 MPa. The width of the heat-affected zone did not exceed 15.9 mm, measured from the weld centerline, while the impact energy results were 74 and 39 J at 20 and – 40 °C, respectively.

Keywords

gas metal arc welding hardness high-hardness armor steel instrumented Charpy impact toughness porosity 

Notes

Acknowledgments

The authors would like to thank Dr. Zijah Burzic and the Military Technical Institute for mechanical testing. This study was financially supported by the Ministry of Education, Science and Technological Development of the Republic of Serbia through Project No. ON 174004.

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Copyright information

© ASM International 2018

Authors and Affiliations

  • Aleksandar Cabrilo
    • 1
  • Katarina Geric
    • 1
  • Milos Jovanovic
    • 2
  • Lazic Vukic
    • 3
  1. 1.Faculty of Technical SciencesUniversity of Novi SadNovi SadSerbia
  2. 2.Welding InstituteLjubljanaSlovenia
  3. 3.Faculty of EngineeringUniversity of KragujevacKragujevacSerbia

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