Mechanical properties of multi-directional forged Al-7Si-4Zn-3Cu alloy

ALEMDAĞ Y., KARABIYIK S., YANAR H., PÜRÇEK G.

13th International Conference on Superplasticity in Advanced Materials, ICSAM 2018, Petersburg, Rusya, 19 - 22 Ağustos 2018, cilt.385 DDF, ss.250-255 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 385 DDF
  • Doi Numarası: 10.4028/www.scientific.net/ddf.385.250
  • Basıldığı Şehir: Petersburg
  • Basıldığı Ülke: Rusya
  • Sayfa Sayıları: ss.250-255
  • Anahtar Kelimeler: Al-Si based alloys, Grain refinement, Multi directional forging, Severe plastic deformation
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

© 2018 Trans Tech Publications, SwitzerlandIn this study, Al-7Si-4Zn-3Cu alloy was processed by multi-directional forging (MDF) at 3, 6 and 9 passes corresponding to one, two and three cycle, respectively. The structural and mechanical properties of the alloys were investigated in the as-cast, homogenized and MDFed states. The MDF resulted in a severely deformed and refined microstructure with eliminated casting defects like micro-porosity with nearly homogeneous distributed fine silicon particles. The ultimate tensile strength (UTS) and yield strength (YS) of the alloy increased up to two cycle, above which they decreased, while the percent elongation (E%) increased continuously with the cycle number. The compressive strength (CS) and micro and macro hardness of the alloy decreased with increasing MDF cycles. The results were evaluated according to microstructural changes depending on MDF cycles.