Study of the joining of polycarbonate panels in butt joint configuration through friction stir welding

2018 ◽  
Author(s):  
Antonello Astarita ◽  
Luca Boccarusso ◽  
Luigi Carrino ◽  
Massimo Durante ◽  
Fabrizio Memola Capece Minutolo ◽  
...  
Keyword(s):  
Friction Stir Welding ◽  
Butt Joint ◽  
Joint Configuration ◽  
Friction Stir

scholarly journals The Influence of Pre-Heating on the Weldability of Pure Copper by FSW

2014 ◽  
Vol 8 (1) ◽  
pp. 177-184 ◽  
Author(s):  
Pierpaolo Carlone ◽  
Gaetano S. Palazzo
Keyword(s):  
Experimental Investigation ◽  
Friction Stir Welding ◽  
Material Flow ◽  
Initial Temperature ◽  
Pure Copper ◽  
Tensile Tests ◽  
Butt Joint ◽  
Joint Configuration ◽  
Friction Stir ◽  
Backing Plate

This paper deals with an experimental investigation on the friction stir welding of pure copper. 4 mm thick copper plates have been welded in the butt joint configuration using a conical unthreaded tool, with and without preheating. An electrically heated backing plate has been employed to increase the initial temperature of the plates and to investigate the influence of pre-heating on the weld ability of the considered material. The welded joints have been analyzed by means of macroscopic and microscopic observations, microhardness measurements and tensile tests. Obtained outcomes suggest that more complex pin shape is needed to promote an adequate material flow without preheating.

scholarly journals Effect of Trailing Intensive Cooling on Residual Stress and Welding Distortion of Friction Stir Welded 2060 Al-Li Alloy

2018 ◽  
Vol 37 (5) ◽  
pp. 397-403 ◽  
Author(s):  
Shude Ji ◽  
Zhanpeng Yang ◽  
Quan Wen ◽  
Yumei Yue ◽  
Liguo Zhang
Keyword(s):  
Residual Stress ◽  
Friction Stir Welding ◽  
Plastic Strain ◽  
Welding Process ◽  
Butt Joint ◽  
Welding Distortion ◽  
Welding Temperature ◽  
Friction Stir ◽  
Numerical Simulation Methods ◽  
Conventional Cooling

AbstractTrailing intensive cooling with liquid nitrogen has successfully applied to friction stir welding of 2 mm thick 2060 Al-Li alloy. Welding temperature, plastic strain, residual stress and distortion of 2060 Al-Li alloy butt-joint are compared and discussed between conventional cooling and trailing intensive cooling using experimental and numerical simulation methods. The results reveal that trailing intensive cooling is beneficial to shrink high temperature area, reduce peak temperature and decrease plastic strain during friction stir welding process. In addition, the reduction degree of plastic strain outside weld is smaller than that inside weld. Welding distortion presents an anti-saddle shape. Compared with conventional cooling, the reductions of welding distortion and longitudinal residual stresses of welding joint under intense cooling reach 47.7 % and 23.8 %, respectively.

The microstructure of aluminum A5083 butt joint by friction stir welding

2015 ◽  
Author(s):  
M. A. H. M. Jasri ◽  
M. Afendi ◽  
A. Ismail ◽  
M. Ishak
Keyword(s):  
Friction Stir Welding ◽  
Butt Joint ◽  
Friction Stir

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.

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