The effect of the aging time on microstructure and mechanical properties of the AA7075 alloy after T6 heat treatment
Küçük Resim Yok
Tarih
2019
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
G.V. Kurdyumov Institute for Metal Physics of N.A.S. of Ukraine
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
In this study, the effect of the aging time on microstructure and mechanical properties of the AA7075 alloy after T6 heat treatment is investigated. The AA7075 alloys are quenched after solid solution treatment at 485°C for 2 hours and artificially aged at 120°C using five different aging times. Hardness measurements, microstructure examinations (SEM + EDS, XRD), and tensile tests are performed for the aged alloys. Fractured surfaces are also examined using SEM images after the tensile testing. The results of the studies conducted show that the hardness value of the alloys can be increased by increasing aging time, and the maximum hardness value of 192 HV is obtained for the alloy aged for 25 hours. Tensile tests also show that the tensile strength of the alloy can be increased by increasing aging time, and the maximum tensile strength value of 580 MPa is obtained for the alloy aged for 25 hours. Fractured surface examinations revealed that the ductile fracture mechanism is mostly dominant, while the planar fracture mechanism is observed as well. © 2019 G. V. Kurdyumov Institute for Metal Physics, National Academy of Sciences of Ukraine.
Açıklama
Anahtar Kelimeler
AA7075 alloy, Aging time, Mechanical properties, Microstructure, Tensile strength
Kaynak
Metallofizika i Noveishie Tekhnologii
WoS Q Değeri
Scopus Q Değeri
Q3
Cilt
41
Sayı
6
