scholarly journals Effect of tool rotational speed on the microstructure and mechanical properties of bobbin tool friction stir welding of Al–Li alloy

2015 ◽  
Vol 86 ◽  
pp. 933-940 ◽  
Author(s):  
F.F. Wang ◽  
W.Y. Li ◽  
J. Shen ◽  
S.Y. Hu ◽  
J.F. dos Santos
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Rotational Speed ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties

Evaluation of Microstructure and Mechanical Properties for Friction Stir Welding of Aluminium HE-30 Plates

2019 ◽  
Vol 969 ◽  
pp. 720-726
Author(s):  
Ajay Kumar Revelly ◽  
B. Rajkumar ◽  
V. Swapna
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Rotational Speed ◽  
Weld Zone ◽  
Tool Geometry ◽  
Welding Parameters ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Microstructure And Mechanical Properties ◽  
Non Destructive

The main aim of the present topic is friction stir welding (FSW) of Aluminium HE-30, which shows that improved microstructures, strong weld and with less of defects. In the other hand, an attempt was made to correlate the welding parameters and mechanical properties. In the present investigation four rotational speeds of 1000 rpm, 1200 rpm, 1400 rpm and 1600 rpm with travelling speed of 30 mm/min. and tool geometry (straight cylindrical) was chosen. It was observed that the tool rotational speed is a sensitive parameter to decide the ultimate tensile strength and yield strength of the present material. Similarly, the hardness of Al plates is improved at the weld zone. Hence, it is suggested that to consider a parameter such as welding tool rotational speed, travelling speed and materials in selecting the welding methods of sound joints, because it influences the microstructure and mechanical properties in various applications. In the present study, non-destructive tests are also confirmed the defective nature of the weld zone of Al plates.

scholarly journals Microstructure and Mechanical Properties of Friction Stir Welded Joints Between Commercially Pure Copper and Al 6351 Alloy

2017 ◽  
Vol 62 (3) ◽  
pp. 1819-1825
Author(s):  
V.C. Sinha ◽  
S. Kundu ◽  
S. Chatterjee
Keyword(s):  
Mechanical Properties ◽  
Welded Joints ◽  
Rotational Speed ◽  
Pure Copper ◽  
Stir Zone ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Commercially Pure ◽  
Microstructure And Mechanical Properties ◽  
Commercially Pure Copper

AbstractIn the present study, the effect of tool rotational speed on microstructure and mechanical properties of friction stir welded joints between commercially pure copper and 6351 Al alloy was carried out in the range of tool rotational speeds of 300-900 rpm in steps of 150 rpm at 30 mm/minutes travel speed. Up to 450 rpm, the interface of the joints is free from intermetallics and Al4Cu9intermetallic has been observed at the stir zone. However, Al4Cu9intermetallic was observed both at the interface and the stir zone at 600 rpm. At 750 and 900 rpm tool rotational speed, the layers of AlCu, Al2Cu3and Al4Cu9intermetallics were observed at the interface and only Al4Cu9intermetallics has been observed in the stir zone. The maximum ultimate tensile strength of ~207 MPa and yield strength of ~168 MPa along with ~6.2% elongation at fracture of the joint have been obtained when processed at 450 rpm tool rotational speed.

Mechanical Property of Friction Stir Welded Retardant Magnesium Alloy Joint

2011 ◽  
Vol 295-297 ◽  
pp. 1929-1932
Author(s):  
Yi Min Tu ◽  
Ran Feng Qiu ◽  
Hong Xin Shi ◽  
Xin Zhang ◽  
Ke Ke Zhang
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Friction Stir Welding ◽  
Magnesium Alloy ◽  
Welding Speed ◽  
Rotational Speed ◽  
Maximum Strength ◽  
Welding Parameters ◽  
Tool Rotational Speed ◽  
Friction Stir

In order to obtain better understanding of the friction stir weldability of the magnesium alloy and provide some foundational information for improving mechanical properties of retardant magnesium alloy joints. A retardant magnesium alloy was weld using the method of friction stir welding. The influence of welding parameters on the strength of the joint was investigated. The maximum strength of 230 MPa was obtained from the joint welded at the tool rotational speed of 1000 r/min and welding speed of 750 mm/min.

scholarly journals Influence of tool rotational speed on the evolution of microstructure and mechanical properties of precipitation-hardened Aluminium 6061 butt joint during friction stir welding

2022 ◽  
Author(s):  
Biplab Ghosh ◽  
Hrishikesh Das ◽  
Asis Samanta ◽  
Jyotsna Dutta Majumdar ◽  
Manojit Ghosh
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Rotational Speed ◽  
Butt Joint ◽  
Tool Rotational Speed ◽  
Nugget Zone ◽  
Friction Stir ◽  
Transmission Electron ◽  
Free Region ◽  
Evolution Of Microstructure

Abstract The present investigation intends to interpret the effect of tool rotational speed on the mechanical properties and microstructural evolution in Aluminium 6061-T6 alloy during friction stir welding. A higher value of tool rotation produces more hardness at the nugget zone, which is attributed to the higher intensity of reprecipitation at higher rpm, revealed by transmission electron microscopy. The nugget zone is revealed as a nearly precipitate-free region, while the thermo-mechanically affected zone contains coarse precipitates, deformed and dynamically recovered grains with a few recrystallized grains. Significant reduction in grain size in the stirred zone is also a key finding. The observations depict the dependence of microstructure, and thus mechanical behaviour on tool rotational speed. A specific combination of process parameters has been determined from experiments, which corresponds to the maximum joint efficiency.

Effects of friction stir welding on corrosion and mechanical properties of AA6063 in sea water

2021 ◽  
pp. 095440622199554
Author(s):  
Laxmana Raju Salavaravu ◽  
Lingaraju Dumpala
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Friction Stir Welding ◽  
Corrosion Rate ◽  
Rotational Speed ◽  
Traverse Speed ◽  
Tool Rotational Speed ◽  
Friction Stir ◽  
Tool Pin Profile ◽  
Tool Pin

Submerged friction stir welding (FSW) is used to improve the weld zones mechanical properties in the present study. This research aims to obtain the optimized process parameters used to fabricate the AA6063 Submerged FSW joint. In the Submerged FSW process, the most important influential factors are tool rotational speed, traverse speed, and pin profile in a seawater environment. The different workpieces are friction stir welded while submerged in seawater at different tool rotational speeds, traverse speeds, and tool pin profiles such as square pin, cylindrical taper pin, and threaded pin. The produced weldments were tested for the mechanical properties of higher tensile strength, microhardness, corrosion rate, and the microstructure of weldments was characterized by using a scanning electron microscope, transmission electron microscope, and X-ray diffractometer. The corrosion rate is investigated by using an electrochemical analyzer by potential dynamic polarization open-circuit technique. For this investigation, The Taguchi method with the L9 orthogonal array design of experimentation is adopted. The maximum UTS was acquired in the weld joint fabricated with 1250 r/min of tool rotational speed, 45 mm/min traverse speed, and a square tool pin. The stirred zone is tested for microhardness. High hardness is achieved with high tool rotational speed and low traverse speed with a square tool pin profile. The corrosion rate is also decreased with high tool rotational speed, low traverse speed, and a square tool pin profile.

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