Improving the ballistic immunity of armour steel weldments by plasma transferred arc (PTA) hardfacing |
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| Authors: | S Babu V Balasubramanian G Madhusudhan Reddy TS Balasubramanian |
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| Affiliation: | 1. Department of Metallurgical & Materials Engineering, Indian Institute of Technology – Madras (IITM), Chennai 600 036, Tamil Nadu, India;2. Centre for Materials Joining & Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar 608 002, Tamil Nadu, India;3. Solidification Division, Defence Metallurgical Research Laboratory (DMRL), Kanchanbagh 500 058, Andhra Pradesh, India;4. Fabrication & Integration, Combat Vehicles Research & Development Establishment (CVRDE), Avadi 600 054, Tamil Nadu, India |
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| Abstract: | This investigation describes about improving the ballistic immunity of armour steel joints which are fabricated by sandwiching of plasma transferred arc (PTA) hardfaced interlayers in between soft austenitic stainless steel (ASS) welds. From the results, the welds with sandwiched interlayer stopped all the projectiles successfully, irrespective of processes used, whereas welds without sandwiched interlayer were failed. In order to know the cause of failure, a detailed metallographic examination was carried out. The variation in microstructure and hardness at various zones of the weld are discussed. For the first time, it was found that the armour steel could be hardfaced by the PTA process with tungsten carbide powder. |
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