Effect of tempering time on the ballistic performanceof a high strength armour steel

Abstract

The investigation describes and analyses the effect of tempering time on the mechanical and ballistic performance of a high strength armoursteel. The steel is subjected to tempering at 300?C for 2, 24 and 48 h. A marginal variation in strength and hardness is observed with increase intempering time, whereas ductility and Charpy impact values are found to be decreasing. Ballistic performance of the samples are evaluated byimpacting 7.62 mm and 12.7 mm armour piercing projectiles at 0?angle of impact. Results show a small variation in the ballistic performancewhen impacted with 7.62 mm armour piercing projectile. A decrease in ballistic performance of the material is observed with increasing temperingtime when impacted with 12.7 mm armour piercing ammunition.