Ballistic Efficacy of Carbide Free High Strength Nano Structured Bainitic Armour Steels

Pub Date : 2023-03-09 DOI:10.14429/dsj.73.18634

Bidyapati Mishra, G Sukumar, P P Senthil, P R S Reddy, B B Singh, B Ramakrishna, K Siva Kumar, V Madhu

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引用次数: 1

Abstract

Carbide free nano-structured bainitic steels typically have strength more than 2.0 GPa and impact toughness of 7 J or less. Most of this class of steels have sluggish kinetics and takes 16-72 h for complete bainitic transformation. The present work discusses key perspectives in developing carbide free nano-structured bainitic steel having strength more than 2.0 GPa and toughness more than 15 J. Further, ballistic evaluation of newly developed carbide free nano-structured bainitic steels having strength more than 2.0 GPa and high toughness of 20 J was carried out to understand the adaptability of these steels in combat vehicle applications. A comparison is made between newly developed high strength and tough carbide free nano-structured bainitic steels with typical martensite based ARMOX 500 class of armour steels. The developed nano-structured bainite showed ballistic performance much superior to ARMOX 500 steel. Monolithic plates of bainite provide complete protection against 7.62 AP projectiles at an areal density of 120 kgm-2. The ballistic efficiency of monolithic plates was further enhanced by using perforated geometrical configurations.

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无碳化物高强度纳米结构贝氏体装甲钢的弹道效能

无碳化物纳米结构贝氏体钢的强度通常大于2.0 GPa，冲击韧性为7j或更低。大多数这类钢的动力学缓慢，需要16-72 h才能完全转变为贝氏体。本工作讨论了开发强度大于2.0 GPa、韧性大于15 J的无碳化物纳米贝氏体钢的关键观点。此外，对新开发的强度大于2.0 GPa、高韧性为20 J的无碳化物纳米贝氏体钢进行了弹道评估，以了解这些钢在作战车辆应用中的适应性。将新开发的高强韧无碳化物纳米组织贝氏体钢与典型的马氏体基ARMOX 500装甲钢进行了比较。所制备的纳米贝氏体的弹道性能明显优于ARMOX 500钢。贝氏体整体板提供了对面密度为120kgm -2的7.62 AP弹丸的完全保护。采用穿孔几何结构进一步提高了整体式板的弹道效率。

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