Experimental ballistic performance of friction stir processed aluminum (AA6061-B4C) surface composite

• Autores: Ramasamy Nagarajan, Suresh Kumar Sundaram
• Localización: Mechanics based design of structures and machines, ISSN 1539-7734, Vol. 51, Nº. 5, 2023, págs. 2936-2956
• Idioma: inglés
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• Resumen

  • In this paper, the ballistic performance of AA6061-B4C surface composite targets fabricated by Friction Stir Processing (FSP) technique has been investigated. The paper is divided into two stages. Stage I identifies the suitable process parameters namely, the rotational speed and feed to produce defect free surface composite targets. Standard tests such as tensile test, microhardness and macroscopic examination are carried on FSPed AA6061-B4C surface composite to identify the best process parameters. In stage II, ballistic experiments are conducted on FSPed AA6061-B4C targets for both single and multiple hit conditions. The ballistic performances of the targets are measured in by Depth of Penetration (DoP) method. It is seen that, in both single and multiple impact conditions, radial cracks are observed near the crater region of BM AA6061 targets. Especially in multiple hit, severe cracking occurred around the craters present near the edges of BM AA6061 target. On the other hand, no cracks are observed in FSPed AA6061-B4C targets after both single and multiple hit conditions. A 13%–20% DoP is observed in FSPed AA6061 target compared to BM target. It is inferred that, improvement in microhardness and frictional characteristics offered by B4C particles have played a vital role in improving the ballistic performance of FSPed AA6061-B4C targets.