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Effect of Hardfaced Interlayer Thickness and Low Hydrogen Ferritic Capping on Ballistic Performance of Shielded Metal Arc Welded Armour Steel Joints

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Abstract

Armour grade quenched and tempered steel closely confirming to AISI 4340 is well known for its superior ballistic performance and hence used in the fabrication of combat vehicles. The traditional filers like austenitic stainless steel showed poor ballistic performance of these welded joints as compared to the base metal. Attempts have been made to deposit hardfaced interlayer between austenitic stainless steel weld metals. Though this method, marginal improvements in ballistic performance can be yielded, and cracks were observed in between base metal and hardfaced layer. Thickness of the hardfaced interlayer plays a vital role for the effective ballistic performance. Thus, an attempt has been made to investigate the effect of hardfaced interlayer thickness on ballistic performance of armour steel welds. The results of effect of buttering, low hydrogen ferritic (LHF) filer and three different hardfaced layer thicknesses (4, 5.5 and 7 mm) on ballistic performance of shielded metal arc welded armour steel joints were given.

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Authors and Affiliations

  1. Center for Materials Joining and Research (CEMAJOR), Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, 608002, Tamil Nadu, India

    M. Balakrishnan (Master) & V. Balasubramanian (Doctor, Professor)

  2. Solidification Technology Division, Metal Joining Group, Defense Metallurgical Research Laboratory (DMRL), Kanchanbagh, 500058, Hyderabad, India

    G. Madhusudhan Reddy

Authors
  1. M. Balakrishnan
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  2. V. Balasubramanian
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  3. G. Madhusudhan Reddy
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Corresponding author

Correspondence to V. Balasubramanian.

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Balakrishnan, M., Balasubramanian, V. & Madhusudhan Reddy, G. Effect of Hardfaced Interlayer Thickness and Low Hydrogen Ferritic Capping on Ballistic Performance of Shielded Metal Arc Welded Armour Steel Joints. J. Iron Steel Res. Int. 20, 82–91 (2013). https://doi.org/10.1016/S1006-706X(13)60220-4

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  • DOI: https://doi.org/10.1016/S1006-706X(13)60220-4

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