Incremental Severe Plastic Deformation Effect on Mechanical and Microstructural Characteristics of AA6063

GÜNAY BULUTSUZ A., Chrominski W.

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, vol.74, no.1, pp.69-77, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 74 Issue: 1
  • Publication Date: 2021
  • Doi Number: 10.1007/s12666-020-02122-4
  • Journal Name: TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.69-77
  • Keywords: Severe plastic deformation, AA 6063, I-ECAP, Incremental SPD methods, I-ECAP, HIGH-PRESSURE TORSION, GRAIN-REFINEMENT, REPETITIVE CORRUGATION, HYDROSTATIC EXTRUSION, ECAP-CONFORM, AL, ALLOY, EVOLUTION, BEHAVIOR, FUNDAMENTALS
  • Yıldız Technical University Affiliated: Yes

Abstract

In this experimental study, a commercially available AA 6063 in the form of cold profile extruded and T6 heat treated was processed by Incremental Equal Angular Pressing (I-ECAP) through the B-C route. I-ECAP deformation was applied at room temperature with a feeding rate of 0.1 mm/cycle. Afterward, the effect of I-ECAP on the microstructure and mechanical properties of AA 6063 was investigated in detail. The aim of this study was to investigate the possibilities to improve properties of semi-products of commercially available aluminum alloy, especially for industrial applications. According to the visible light microscope observations 4 passes of I-ECAP resulted in grain size reduction, which was 46%. The hardness and tensile test results showed that the I-ECAP process significantly increased mechanical properties of the billets. The hardness was 56% higher, and the mechanical strength was 37% higher than measured for the initial state. Moreover, the grain size distribution was more homogenous in the 4 I-ECAP passes processed samples than the initial state. According to these results, the I-ECAP method has potential in industrial usage for manufacturing ultrafine and fine-grain semi- and final products with superior mechanical properties.