Mechanical Properties Of AA 6061-T6 Aluminum Alloy Friction Stir Welds

Abstract

The different parameters  on  mechanical  and  microstructural  properties  of  aluminium  alloy  6061-T6 Friction  stir-welded  (FSW) joints  were investigated in the  present study. Different welded  specimens were produced by employing variable rotating  speeds and welding speeds. Tensile strength of the produced joints  was tested at room  temperature and the the effecincy was assessed, it was 75% of the base metal at rotational speed 1500 rpm and weld speed 50 mm/min. Hardness of various zones of FSW welds are presented and  analyzed by  means of  brinell hardness number . Besides to thess tests the bending properties  investigated and showed good results in some specimen and not in onother the mamximum stress was 240 N/mm² at rotational speed 1500 rpm and weld speed 50 mm/min , while the maximum stress at 1250 rpm and 75  mm/min 94 N/mm² , hardness results shwed lower values in heat affected and nugget zones than the base metal with improving of hardness at 1500 rpm, 75 mm/min  .