Characterization of Al-7075/T651 Alloy by RRA Heat Treatment and Different Pre-deformation Effects

In this study, microstructural transformations, hardness and tensile properties of Al-7075/T651 alloy were investigated by applying different RRA (retrogression and re-aging) heat treatment procedures. The conventional RRA method involves 10 min of retrogression of the sample at 200 °C, followed by...

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Bibliographic Details
Published in:Transactions of the Indian Institute of Metals 2021-12, Vol.74 (12), p.3025-3033
Main Authors: Altuntaş, Gözde, Altuntaş, Onur, Bostan, Bülent
Format: Article
Language:English
Subjects:
Aging (metallurgy)
Aluminum base alloys
Chemistry and Materials Science
Corrosion and Coatings
Deformation effects
Dislocation density
Elongation
Heat treating
Heat treatment
Materials Science
Metallic Materials
Microstructure
Original Article
Predeformation
Room temperature
Tensile properties
Tribology
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Summary:In this study, microstructural transformations, hardness and tensile properties of Al-7075/T651 alloy were investigated by applying different RRA (retrogression and re-aging) heat treatment procedures. The conventional RRA method involves 10 min of retrogression of the sample at 200 °C, followed by room temperature quenching and re-aging at 120 °C for 2–32 h, respectively. RRA heat treatment applied with pre-deformation effect was carried out with two different methods and deformation rates. Thus, the effects of pre-deformation amount on microstructure and tensile properties during RRA heat treatment on Al-7075 alloy with T651 heat treatment were investigated. Distribution of secondary phases, dislocation density, micro-strain and interplanar peaks were calculated by XRD analysis. During the RRA heat treatment, the break elongation value of the alloy increased by up to 20% with the applied pre-deformation amount of 5%.
ISSN:0972-2815
0975-1645
DOI:10.1007/s12666-021-02369-5