Ageing behaviour of spray cast Al-Zn-Mg-Cu alloys
Küçük Resim Yok
Tarih
2001
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Three 7xxx series aluminium SS70, N707 and 7075 alloys containing copper, zinc and magnesium were spray deposited using rapid solidification. Ageing of the 7075 alloy resulted in a peak hardnesses of 147, 186 and 191 MPa after 2, 24 and 48 h at temperatures of 175°C, 130°C and 120°C respectively. The other two alloys, SS70 and N707, were aged at 120°C, and both reached peak hardness after 24 h; SS70 had a peak hardness of 229 MPa and N707 of 228 MPa. A double ageing treatment at 105°C for 5 h then at 175°C for 1 h significantly increased the peak hardness to 185.6 MPa compared to a single stage of ageing at the higher temperatures in the 7075 alloy. TEM analysis of aged specimens revealed two types of precipitate that contributed to age hardening: ?1 and ? (MgZn2).
Açıklama
Anahtar Kelimeler
7xxx series aluminium alloys, Age hardening, Ageing precipitates, Spray casting, TEM
Kaynak
Turkish Journal of Engineering and Environmental Sciences
WoS Q Değeri
Scopus Q Değeri
N/A
Cilt
25
Sayı
6
