Effects of Die Corner Radius and Temperature on the Formability of AA7075-T6 Alloy
Küçük Resim Yok
Tarih
2013
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Chinese Acad Sciences, Inst Metal Research
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This study focused on the formability of aluminium alloy (7075-T6) sheets through hydroforming route. Formability of these sheets was tested using a warm forming setup at three different temperatures and four different die corner radii. Forming limit diagrams (FLD) were generated by measuring the grids of the sheet formed. The results show that the forming limit of AA7075-T6 can be significantly improved when the blank was heated to 140-250 degrees C. It was also observed that as the temperature increases above 140 degrees C, dome height began to decrease. Also the results indicated that both the die corner radius and temperature have a significant effect on the stress-strain curve and warm forming of AA7075-T6 sheets. Thus, with the temperature increased from room temperature (RT) to 140 degrees C, the flow stress decreased and the strain increased, hence, the formability is enhanced. However, further increase in temperature causes decreases the flow stress and strain. Similar changes of the flow curve were seen in die corner radius. Decreasing the die corner radius decreases the flow stress and increase the strain. Moreover, an equation was obtained by establishing correlations between the experimental parameters and their results. In this way, it became possible to make predictions.
Açıklama
Anahtar Kelimeler
Al-Zn-Mg-Cu Alloy, Drawing process, Formability, Forming limit curve, Deformation
Kaynak
Acta Metallurgica Sinica-English Letters
WoS Q Değeri
Q3
Scopus Q Değeri
Q1
Cilt
26
Sayı
5
