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

Altuntaş G., Altuntaş O., Bostan B.

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS, cilt.74, sa.12, ss.3025-3033, 2021 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 74 Sayı: 12
  • Basım Tarihi: 2021
  • Doi Numarası: 10.1007/s12666-021-02369-5
  • Dergi Adı: TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Communication Abstracts, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.3025-3033
  • Anahtar Kelimeler: Al-7075, T651, RRA heat treatment, Crystallographic analysis, Pre-deformation, AL-ZN-MG, 7075 ALUMINUM-ALLOY, CU ALLOY, PRECIPITATION BEHAVIOR, MECHANICAL-PROPERTIES, STRENGTH, MICROSTRUCTURE, RETROGRESSION, RESISTANCE, CORROSION
  • Gazi Üniversitesi Adresli: Evet

Özet

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 degrees C, followed by room temperature quenching and re-aging at 120 degrees 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%.