A study on commercial pure Al (1050) after cold rolling at room temperature with various deformations using positron annihilation

• Published in: Journal of materials engineering and performance 2003-04, Vol.12 (2), p.190-195
• Main Authors: GOMAA, E, MOSTAFA, N, MOHSEN, M, TAHA, A. S
• Format: Article
• Language: English
• Subjects: Aluminum; Annealing; Applied sciences; Cold rolling; Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization; Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Cross-disciplinary physics: materials science; rheology; Deformation; Doppler; Doppler effect; Exact sciences and technology; Materials science; Metals. Metallurgy; Physics; Positron annihilation; Recrystallization; Treatment of materials and its effects on microstructure and properties
• ISSN: 1059-9495; 1544-1024
• DOI: 10.1361/105994903770343349

Positron annihilation lifetime (PAL), Doppler broadening (DB), and Vickers microhardness measurements (Hv) were performed to study the isochronal annealing of commercial pure Al (1050) in the temperature range from room temperature (RT) to 823 K after cold rolling at RT with various deformations of 16%, 37%, and 54%. PAL measurements show a decrease in the average lifetime of positron (τ ^sub av^) followed by saturation at 190 ps as a function of annealing temperature. The results of Doppler broadening of annihilation radiation (S and W parameters) are found to be consistent with PAL measurements. The correlation between the characteristics of positron annihilation and Hv shows three annealing stages of microstructure in commercial Al, which are attributed to recovery, partial recrystallization, and complete recrystallization.[PUBLICATION ABSTRACT]