Development of an ultrahigh strength low alloy steel for armour applications

作者：Kolla H H; Mishra B^*; Jena P K; Kumar K Siva; Bhat T B; Srinivas M; Reddy A V

来源：Materials Science and Technology, 2011, 27(2): 551-555.

DOI：10.1179/026708309X12560332736476

• Armour steel
• Martensite
• Strength
• Toughness

The present paper describes a steel with yield strength exceeding 1900 MPa and fracture toughness in the range of 40-50 MPa m(1/2), in its optimum heat treated condition. Its strength is similar to that of 18 Ni (300) grade of maraging steel with good fracture toughness. When tempered at 300 degrees C, it shows tempered martensite along with a small amount of retained austenite phase. The steel shows nearly 25% reduction in weight over typical rolled homogeneous armour (RHA) steel against high velocity hard steel core projectiles. The processing, microstructure, mechanical and ballistic properties of the steel are demonstrated.

• 出版日期2011-2