Özdemir U.Sayer S.Yeni C.2019-10-262019-10-2620120025-53000025-5300https://doi.org/10.3139/120.110322https://hdl.handle.net/11454/18979The effect of pin penetration depth on the mechanical properties of friction stir spot welded (FSSW) aluminum alloy 1050 and pure copper has been investigated. For a certian tool geometry, constant tool rotation speed and penetration time, the materials have been friction stir spot welded in three different penetration depths, namely 2.8 mm, 4 mm and 5 mm. Tensile shear tests, microhardness measurements and micostruc-tural investigation have been carried out on the welded specimens in order to investigate the effect of penetration depth. 2.8 mm plunge depth has resulted in a weak joint, whereas 4 mm and 5 mm plunge depths offer acceptable tensile shear results. Presence of intermetallic phases had an influence on the tensile shear and hardness values. © Car Hanser Verlag, München.en10.3139/120.110322info:eu-repo/semantics/closedAccessArticle544233239Q2