Microstructural and Mechanical Properties of Al 7003 Alloy Processed by Dual Equal Channel Lateral Extrusion

Abstract:

In this paper, the Al 7003 alloy in the as-annealed condition was processed by dual equal channel lateral extrusion (DECLE) at room temperature. The microstructure and mechanical properties of the as-annealed and DECLEed alloys were examined. The results showed that the microstructure of as-annealed Al 7003 alloys was refined by the formation of deformation bands, with dislocation cells and subgrains inside these bands. The final grains with an average size of about 250nm are observed. Due to DECLE, tensile yield strength and ultimate tensile strength increase by 84.5%, 35.4%, respectively. Meanwhile, elongation to failure decreases by 40.4%. The fracture was characterized by ductile fracture due to existence of a large number of dimples.

• Periodical: Advanced Materials Research (Volume 852)
• Pages: 214-218
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.852.214
• Online since: January 2014
• Authors: Zhao Hua Liu, Hua Rong Qi, Xiao Wang, Shi Qi, Nan Qing
• Keywords: Equal-Channel Angular Pressing (ECAP), Grain Refinement, Severe Plastic Deformation

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