INVESTIGATION ON THE EFFECTS OF USING NANO-SIZE AL2O3 POWDER ON THE MECHANICAL AND MICROSTRUCTURAL IN THE MULTI-PASSES CONTINUOUS FRICTION STIR WELDING OF THE 2024-T6

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NAZARI MOHAMMAD; BESHARATI GIVI MOHAMMAD KAZEM; FARAHANI MOHAMMAD REZA; MOLLAEI MILANI JAVAD; MOHAMMADZAEH JAMALIYAN HASAN

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Journal: Modares Mechanical Engineering Year:2015 | Volume:14 | Issue:12 Page(s): 85-90

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Title

INVESTIGATION ON THE EFFECTS OF USING NANO-SIZE AL2O3 POWDER ON THE MECHANICAL AND MICROSTRUCTURAL IN THE MULTI-PASSES CONTINUOUS FRICTION STIR WELDING OF THE 2024-T6

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Keywords

FRICTION STIR WELDINGQ2

ULTIMATE TENSILE STRENGTHQ2

MICRO-HARDNESSQ2

NANO-SIZE AL2O3Q2

GRAIN SIZEQ1

Abstract

The main aim of this experiment is to investigate the effects of Nano-size Al2O3 on the mechanical properties and microstructure of multi-passes FRICTION STIR WELDING of Al 2024 lap joint. Nano particles were added into the joint line. A combination of rotational speed and travelling speeds were performed. Optical microscopy and scanning electron microscope were used to investigate the microstructure and fracture surface of samples respectively. Optimum condition (sample) was selected due to highest ULTIMATE TENSILE STRENGTH (UTS). It was seen that sample which included Nano particles and fabricated by 1400 rev/min rotational speed and 16 mm/min travelling speed in second pass of continues welding had improvement in UTS in comparison to one pass welded sample of particle free and after that increasing the number of passes reduce the UTS. The average micro hardness of the sample which was particle rich were increased in comparison to particle free sample in nugget zone. Increasing the number of passes was not effect average micro hardness in nugget zone signiicantly. GRAIN SIZEs were reduced by 2 passes welding and after that no significant reduction has been seen.

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APA: Copy

NAZARI, MOHAMMAD, BESHARATI GIVI, MOHAMMAD KAZEM, FARAHANI, MOHAMMAD REZA, MOLLAEI MILANI, JAVAD, & MOHAMMADZAEH JAMALIYAN, HASAN. (2015). INVESTIGATION ON THE EFFECTS OF USING NANO-SIZE AL2O3 POWDER ON THE MECHANICAL AND MICROSTRUCTURAL IN THE MULTI-PASSES CONTINUOUS FRICTION STIR WELDING OF THE 2024-T6. MODARES MECHANICAL ENGINEERING, 14(12), 85-90. SID. https://sid.ir/paper/177667/en

Vancouver: Copy

NAZARI MOHAMMAD, BESHARATI GIVI MOHAMMAD KAZEM, FARAHANI MOHAMMAD REZA, MOLLAEI MILANI JAVAD, MOHAMMADZAEH JAMALIYAN HASAN. INVESTIGATION ON THE EFFECTS OF USING NANO-SIZE AL2O3 POWDER ON THE MECHANICAL AND MICROSTRUCTURAL IN THE MULTI-PASSES CONTINUOUS FRICTION STIR WELDING OF THE 2024-T6. MODARES MECHANICAL ENGINEERING[Internet]. 2015;14(12):85-90. Available from: https://sid.ir/paper/177667/en

IEEE: Copy

MOHAMMAD NAZARI, MOHAMMAD KAZEM BESHARATI GIVI, MOHAMMAD REZA FARAHANI, JAVAD MOLLAEI MILANI, and HASAN MOHAMMADZAEH JAMALIYAN, “INVESTIGATION ON THE EFFECTS OF USING NANO-SIZE AL2O3 POWDER ON THE MECHANICAL AND MICROSTRUCTURAL IN THE MULTI-PASSES CONTINUOUS FRICTION STIR WELDING OF THE 2024-T6,” MODARES MECHANICAL ENGINEERING, vol. 14, no. 12, pp. 85–90, 2015, [Online]. Available: https://sid.ir/paper/177667/en

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