El Fawkhry, M., Fathy, A. (2021). The Effect of Bad Heat Treatment Technology on Failure Mode of Armor Steel Sheet under EN1522 Ballistic Test. International Journal of Materials Technology and Innovation, 1(1), 30-44. doi: 10.21608/ijmti.2021.181110
M. K. El Fawkhry; A. M. Fathy. "The Effect of Bad Heat Treatment Technology on Failure Mode of Armor Steel Sheet under EN1522 Ballistic Test". International Journal of Materials Technology and Innovation, 1, 1, 2021, 30-44. doi: 10.21608/ijmti.2021.181110
El Fawkhry, M., Fathy, A. (2021). 'The Effect of Bad Heat Treatment Technology on Failure Mode of Armor Steel Sheet under EN1522 Ballistic Test', International Journal of Materials Technology and Innovation, 1(1), pp. 30-44. doi: 10.21608/ijmti.2021.181110
El Fawkhry, M., Fathy, A. The Effect of Bad Heat Treatment Technology on Failure Mode of Armor Steel Sheet under EN1522 Ballistic Test. International Journal of Materials Technology and Innovation, 2021; 1(1): 30-44. doi: 10.21608/ijmti.2021.181110
The Effect of Bad Heat Treatment Technology on Failure Mode of Armor Steel Sheet under EN1522 Ballistic Test
2Quality control Department, Ezz Flat Steel, El Shokhna, Egypt
Abstract
Armor steel is a special grade of steel that is commonly designed for providing protection of the army resources from different piercing ammunitions. This steel must be assessed through its mechanical properties, and its ballistic resistant to confirm their ability to withstand the resistance of armor-piercing ammunition, before being subjected to use. Case study of armor steel sheet 6mm thickness that has been subjected for normal ballistic test EN1522, one projectile passed through the sheet, while the other two projectiles have fired at the surface of the sheet. Then, this research was designed to investigate the root cause of failure of this armor steel sheet 6mm under ordinary ballistic test. Constituent structures of steel have been monitored and estimated by using Optical, Scanning electron microscope, Micro hardness tester, and X-ray diffractometer. In addition, hardness map at the surface of the investigated sheet has been detected. Finally, thermal transformation of this steel has been determined by using Dilatometer. The results refer that the root cause of failure should be attributed to the inhomogeneity in the microstructure among the sheet area, which certainly refers to the poor homogeneity at the heat treatment cycle used at the production site.
[1] B. Mishra, B. Ramakrishna, P. K. Jena, K. Siva Kumar, V. Madhu, N. K. Gupta, Experimental studies on the effect of size and shape of holes on damage and microstructure of high hardness armor steel plates under ballistic impact, Materials & Design 43 (2013) 17-24.
[2] A. G. Odeshi, M. N. Bassim, M. Bolduc., Damage mechanism in high hardness armor (HHA) steel subjected to V50 ballistic impact, DYMAT- International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading. Vol. 1. EDP Sciences, (2009) 563-567.
[3] P. P. Senthil, B. B. Singh, K. S. Kumar, A. K. Gogia, Effect of heat treatment on ballistic performance of an armour steel against long rod projectile, International Journal of Impact Engineering 80 (2015) 13-23.
[4] P. K. Jena, Ponguru Senthil P., Siva Kumar K., Effect of tempering time on the ballistic performance of a high strength armour steel, Journal of applied research and technology, 14,1 (2016) 47-53.
[5] K. Maweja, W. Stumpf, The design of advanced performance high strength low-carbon martensitic armour steels: Part 1. Mechanical property considerations, Materials Science and Engineering: A, 485, 1-2 (2008) 140-153.
[6] P. k. Jena, B. Mishra, M. Rameshbabu, A. Babu, A. K. Singh, K. Sivakumar, T. B. Bhat, Effect of heat treatment on mechanical and ballistic properties of a high strength armour steel, International Journal of Impact Engineering, 37,3, (2010) 242-9.
[7] G. Shigesato, T. Fujishiro, T. Hara, Grain boundary segregation behavior of boron in low-alloy steel, Metallurgical and Materials Transactions A, 45,4, (2014) 1876-82.
[8] J. Venezuela, Q. Liu, M. Zhang, Q. Zhou, A. Atrens, A review of hydrogen embrittlement of martensitic advanced high-strength steels, Corrosion Reviews, 34,3, (2016) 153-186.
[9] A. Popławski, P. Kędzierski, A. Morka, Identification of Armox 500T steel failure properties in the modeling of perforation problems, Materials & Design, 190, (2020) 108536.
[10] J. Feng, W. Sun, Z. Liu, C. Cui, X. Wang, An armour-piercing projectile penetration in a double-layered target of ultra-high-performance fiber reinforced concrete and armour steel: Experimental and numerical analyses, Materials & Design, 102, (2016), 131-141.
[11] C. Moreno-Castilla, M. A. Alvarez-Merino, F. Carrasco-Marín, J. L. G. Fierro, Tungsten and tungsten carbide supported on activated carbon: surface structures and performance for ethylene hydrogenation, Langmuir, 17,5,(2001), 1752-1756.
[12] J. Holmberg, A. Steuwer, A. Stormvinter, H. Kristoffersen, M. Haakanen, J. Berglund, Residual stress state in an induction hardened steel bar determined by synchrotron-and neutron diffraction compared to results from lab-XRD, MaterialsScience and Engineering: A, 667(2016),199-207.