02061ntm a2200241 a 4500 vtls000083949 KUKTEM 20251117113246.0 141121t2013 my a f m 000 0 eng d THE0007686(Local) 201905171543 fawwaz 201411211200 ariffin UMP TS228.9 .A36 2013 r Bc. Nur Ain Amelia Sathari The effects of single-pass/double-pass technique on friction stir welding of aluminium / Nur Ain Amelia Sathari Kuantan, Pahang : UMP , 2013 xvi, 56 p. : ill. (some col.) ; 30 cm. + 1 CD-ROM Project paper (Bachelor of Mechanical Engineering)-- Universiti Malaysia Pahang - 2013 Bibliography : p. 54-55 Friction stir welding is a solid state welding that use the idea of frictional heat to soften stirred materials without the need of melting. This study is focusing in the effects of single-pass/ double-pass technique on friction stir welding of aluminium. Two pieces aluminium alloy (AA1100) with the same thickness of 6mm were friction stir welded using CNC milling machine. Three different rotational speeds of 1400 rpm, 1600 rpm and 1800 rpm respectively were used for both groups of single-pass and double-pass. Microstructure observation of welded area was studied using metallurgy microscope. All the specimens were tested by using tensile test and Vickers hardness test to evaluate its mechanical properties. Results indicated that at low rotational speeds (rpm) due to defects such as ‘surface lack of fill’ and tunnel in the welded area contributed to the decreases the result in mechanical properties of the specimens. Welded specimens using double-pass technique shows increasing value of tensile strength and hardness value. Therefore, the optimum parameters in FSW process were double-pass technique with rotational speed of 1800 rpm. Friction welding 0 0 0 1 20000 20000 2019-09-04 0 TS228.9 .A36 2013 r Bc. 0000086324 2019-09-04 00:00:00 1 2019-09-04 PSM 0 0 0 1 20000 20000 2019-09-04 0 CD 8103 | TS228.9 .A36 2013 r Bc. 0000086325 2019-09-04 00:00:00 1 2019-09-04 PSM VIRTUA40 5626 5632 VTLSSORT0080*0200*0400*0900*1000*2450*2600*3000*5020*5040*5200*6500*9992