Influence of Groove Pressing Process on the Drawability (R Value) of Aluminium Alloy AA 5052 Sheets

Abstract:

Aluminium alloy sheets have poor drawability compared to steel sheets as indicated by the values of the plastic strain ratio or the R value. Because of the textures developed during commercial annealing and cold rolling processes, the R value for aluminium alloys is typically less than 1. Since the R value is heavily influenced by the crystallographic texture in the sheet, processes that develop a favourable texture can be utilised to improve the R value. In this study, a severe plastic deformation process called groove pressing has been used to repeatedly deform sheet specimens of aluminium alloy AA 5052. The R values of groove pressed specimens were experimentally determined. X-ray diffraction scans of the groove pressed specimens were carried out to measure the relative intensities of (111) and (002) peaks in the pattern. The largest increase in the R value was for specimens cut at 90° to the rolling direction and groove pressed to four passes. XRD data indicate that the groove pressing process is capable of introducing a favourable shear texture.

• Periodical: Materials Science Forum (Volume 765)
• Pages: 363-367
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.765.363
• Online since: July 2013
• Authors: Ekta Jain, Uday Chakkingal
• Keywords: Aluminium Alloy, Drawability, Groove Pressing, R Value

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