High strength and high ductility behavior of 6061-T6 alloy after laser shock processing

Gencalp Irizalp S., SAKLAKOĞLU N.

Optics and Lasers in Engineering, cilt.77, ss.183-190, 2016 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 77
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1016/j.optlaseng.2015.08.004
  • Dergi Adı: Optics and Lasers in Engineering
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.183-190
  • Anahtar Kelimeler: Laser shock processing, Mechanical properties, Microstructure
  • Manisa Celal Bayar Üniversitesi Adresli: Evet

Özet

The plastic deformation behavior of 6061-T6 alloy which was subjected to severe plastic deformation (SPD) at high strain rates during laser shock processing (LSP) was researched. In LSP-treated materials, the near surface microstructural change was examined by TEM and fracture surfaces after tensile testing were examined by SEM. An increase in strength of metallic materials brings about the decrease in ductility. In this study, the results showed that LSP-treated 6061-T6 alloy exhibited both high strength and high ductility. TEM observation showed that stacking fault (SF) ribbon enlarged, deformation twins formed and twin boundary increased in LSP-treated 6061-T6 alloy. This observation was an indication of stacking fault energy (SFE) decrease. Work hardening capability was recovered after LSP impacts.