On the role of cooling and tool rotational direction on microstructure and mechanical properties of friction stir processed AZ91

ASADI P., Besharati Givi M., Parvin N., Araei A., Taherishargh M., Tutunchilar S.

International Journal of Advanced Manufacturing Technology, cilt.63, sa.9-12, ss.987-997, 2012 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 63 Sayı: 9-12
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1007/s00170-012-3971-0
  • Dergi Adı: International Journal of Advanced Manufacturing Technology
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.987-997
  • Anahtar Kelimeler: Friction stir processing, Magnesium alloy, Tensile properties, Wear resistance
  • Marmara Üniversitesi Adresli: Evet

Özet

Abstract This paper deals with an experimental investigation focused on the effects of water cooling treatment, friction stir processing pass number, and tool rotational direction on the microstructure and mechanical properties of friction stir processed AZ91 magnesium alloy. Specimens were produced using different combinations of process parameters. Parallel to increasing the amount of oxide particles in the processed area, water cooling was found to reduce the final grain size and enhance their hardness and strength. Changing the rotational direction in each pass reduces the grain size severely (from 150 to ∼4 μm) and increases the hardness (from 63 to 98 HV) and strength (from ∼130 to ∼250 MPa). However, no significant difference was found in wear resistance of the specimens produced with different process parameters. ©Springer-Verlag London Limited 2012.