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Articles by Firouz Fadaeifard
Total Records ( 2 ) for Firouz Fadaeifard
  Firouz Fadaeifard , Farhad Gharavi , Khamirul Amin Matori , Abdul Razak Daud , Mohd Khairol Anuar Mohd Ariffin and Mokhtar Awang
  Friction stir welding of Aluminum alloys has been increasingly used in the industry on the ground of higher welding quality in comparison with conventional methods. However, not enough studies have been done on a lap joint of AA 6061-T6 which widely been used in aerospace industries. In this article, friction stir lap welding of 6061-T6 aluminium alloy with 5 mm thickness was carried out by using various welding speeds. The effect of welding speed on microstructure, lap shear performance, micro hardness, failure mode and effective plate thickness was investigated. Results showed that tensile shear strength of weld increased by the rising welding speed. Rising welding speed caused hooking and thinning approaches to two plate interfaces which in turn concluding in higher tensile shear strength. The fracture surface of welds was analyzed by field emission scanning electron microscopy (FE-SEM). Study of the fracture surface of the nugget zone by EDX indicated the Fe compounds in that region.
  Khamirul Amin Matori , Mehran Tamjidy , Firouz Fadaeifard , Farhad Gharvi , Hang Tuah Baherodin and Shahla Paslar
  Friction stir welding as a new method of joining is getting more popular whereas the statistical approach as an advanced method of quality management is widely used. Here, a full factorial design 22 (two factors at two levels) with replicates was conducted to investigate the influence of the factors rotational speed (900 and 1200 rpm) and the welding speed (40 and 60 mm min-1) in the Friction Stir Lap Welding (FSLW) process for the purpose of UTS-AS, UTS-RS, grain size-WZ, grain size-HAZ and EPT. The study used plates of Al-alloys AA6061-T6. The factors rotational speed and welding speed were significant and an increase in the welding speed and a decrease in the rotational speed contributed to all the responses in FSLW. Effect of interaction was not significant for all responses such as UTS-AS, grain size-WZ, grain size-HAZ and EPT and the contribution of this effect to the UTS-RS were positive, but less than 18%. The response surface analysis and table of ANOVA indicate that the most effective level of factors for FSLW process in this study was achieved using a 900 rpm and 60 mm min-1 solution of rotational speed and a welding speed, respectively.
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