Enhancing mechanical properties and corrosion performance of AA6063 aluminum alloys through constrained groove pressing technique

FAN R., ATTARILAR S., SHAMSBORHAN M., EBRAHIMI M., GÖDE C., VAROL ÖZKAVAK H.

Transactions of Nonferrous Metals Society of China (English Edition), vol.30, no.7, pp.1790-1802, 2020 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 7
  • Publication Date: 2020
  • Doi Number: 10.1016/s1003-6326(20)65339-0
  • Journal Name: Transactions of Nonferrous Metals Society of China (English Edition)
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.1790-1802
  • Keywords: aluminum alloy, constrained groove pressing technique, corrosion resistance, grain refinement, hardness distribution homogeneity, mechanical properties
  • Isparta University of Applied Sciences Affiliated: Yes

Abstract

The use of a constrained groove pressing (CGP) method to plastically deform AA6063 aluminum alloy led to the improved surface properties. It was found that hardness magnitude is dramatically improved and its uniformity is considerably decreased after the first pass, while subsequent passes result in better hardness behavior for the processed material. Also, the elongated grains formed in the first pass of the CGP are gradually converted to the equiaxed counterparts by adding pass numbers. Eventually, higher corrosion resistance of the sample by imposing the CGP process is related to the quick formation of passivation film and the change in the morphology of the second phase and precipitates which hinder their electrochemical reactions and decrease the potential localized attack sites.