Investigation of surface hardness and roughness on formability of aluminum alloy sheet AA2024-T3 subjected to the shot peening process by silica shots

Authors

  • Jurarat SAWANGPAN King Mongkut’s University of Technology North Bangkok, 1518 Pracharat 1 Rd., Wongsawang, Bangsue, Bangkok 10800, Thailand
  • Sansot PANICH King Mongkut’s University of Technology North Bangkok, 1518 Pracharat 1 Rd., Wongsawang, Bangsue, Bangkok 10800, Thailand
  • Tanakorn JANTARASRICHA Pibulsongkram Rajabhat University, Amphoe Mueang, Phitsanulok, 65000, Thailand
  • Anak KHANTACHAWANA King Mongkut’s University of Technology Thonburi, 126 Pracha Uthit Rd., Bang Mod Thung Khru, Bangkok, 10140, Thailand

DOI:

https://doi.org/10.55713/jmmm.v33i1.1594

Keywords:

Shot peening, Aluminum alloy 2024-T3, Formability, Hole expansion test, Erichsen cupping test

Abstract

Shot peening is one type of modified surface treatment that produces a residual compressive stress on the material subsurface and improves surface properties while generating plastic deformation on the surface. This research work aims to improve surface properties, which include the enhanced material formability of aluminum alloy 2024-T3 sheet having 1.2 mm of thickness, by providing residual compressive stress on the surface using the shot peening process, which uses silica particles of 0.1 mm in diameter. First, shot peening was performed using various process parameters: compressed air, distance from nozzle to target, and duration time. Based on the obtained peening sheet, the surface hardness and roughness tests were experimentally performed on the peened surfaces. Additionally, the residual tension created in the sheet after the shot peening is calculated using the X-ray diffraction technique. Consequently, the shot-peened and unpeened sheets were put through hole expansion and Erichsen cupping tests to compare the results of the formability between the shot-peened and unpeened sheets. It was found that peened sheets had a low surface roughness and increased surface hardness, which is better than the unpeened sheet. Moreover, the residual compressive stresses were higher than on the original sheet. Last, the shot peening condition, which changed the surface properties the most, was tested on the hole expansion and Ericshen cupping tests, where the formability results were very significant.

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Published

2023-03-28

How to Cite

[1]
J. SAWANGPAN, S. PANICH, T. JANTARASRICHA, and A. KHANTACHAWANA, “Investigation of surface hardness and roughness on formability of aluminum alloy sheet AA2024-T3 subjected to the shot peening process by silica shots”, J Met Mater Miner, vol. 33, no. 1, pp. 56–64, Mar. 2023.

Issue

Section

Original Research Articles