Investigation of the tool effect on the strength of friction stir spot welded aluminum specimens: A comparative study

GÜLER ÖZGÜL H.

MATERIALS TESTING, cilt.57, sa.3, ss.239-244, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 57 Sayı: 3
  • Basım Tarihi: 2015
  • Doi Numarası: 10.3139/120.110695
  • Dergi Adı: MATERIALS TESTING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.239-244
  • Anahtar Kelimeler: Al-alloys, friction stir spot welding, mechanical properties, failure modes, MECHANICAL-PROPERTIES, STATIC STRENGTH, ALLOY, MICROSTRUCTURE, GEOMETRY, SHEETS
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

Aluminum and its alloys are widely used in the automotive industry because of their light weight and good formability as well as malleability, and an alternative welding technique, the friction stir spot welding process, can be successfully used to join these materials. In this study, friction stir spot welding is applied to an AA 5754-H111 alloy to compare the effect of tool geometry and tool material on shear strength. Welds are made using different rotational speeds of tool and dwell times ranging from 500 to 1500 rpm and 6 s to 21 s, respectively. The experimental results showed that the combination of dwell time and rotational speed of tool as well as tool geometry and tool material have an important role in the strength of the joints. The total thickness and weld nugget diameter were also investigated in this study.