Exfoliation behavior of EN AW 7020 with T6, step aging and ultrasonic impact peening processes

Yurdgülü H. I., Sadeler R., Koç B.

MATERIALS TESTING, cilt.5, sa.66, ss.687-695, 2024 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 5 Sayı: 66
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1515/mt-2023-0373
  • Dergi Adı: MATERIALS TESTING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex
  • Sayfa Sayıları: ss.687-695
  • Anahtar Kelimeler: EN AW 7020, exfoliation corrosion, T6 heat treatment, two-step aging, ultrasonic impact peening, weldment
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this study the effect of T6 heat treatment, two-step aging treatment and ultrasonic impact peening on the exfoliation corrosion behavior of welded EN AW 7020 was investigated. Exfoliation tests were performed according to the ASTM G34-01 standard. As expected, as a result of the tests, the base material region of all three samples were showed better corrosion resistance than the heat-affected region. Ultrasonic impact peening and two-step aging treatment was observed that improved EXCO sensitivity in the weld area. When sorting was made by considering the resistance to corrosion of the heat affected zone of the samples, it was observed that the best resistance was shown by the sample with two-step aging treatment, and the worst resistance was shown by the sample with T6 heat treatment.