Asymmetry in Material Flow Patterns and Mechanical Properties Along Friction Stir Welding Interface of Dissimilar Metal T-lap Joint

2021 ◽  
pp. 162-167
Author(s):  
Duong Dinh Hao ◽  
Tran Hung Tra ◽  
Masakazu Okazaki
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Material Flow ◽  
Flow Patterns ◽  
Lap Joint ◽  
Friction Stir ◽  
Dissimilar Metal ◽  
Welding Interface

Experimentally Validated Thermo-Mechanically Coupled FE Simulations of Al/Mg Friction Stir Welded Joints

2013 ◽  
Author(s):  
A. H. Kheireddine ◽  
A. H. Ammouri ◽  
G. T. Kridli ◽  
R. F. Hamade
Keyword(s):  
Friction Stir Welding ◽  
Material Flow ◽  
Flow Patterns ◽  
Fe Model ◽  
Friction Stir ◽  
Flow Mixing ◽  
Dissimilar Friction Stir Welding ◽  
Daunting Task ◽  
Simulated Temperature ◽  
Deform 3D

Numerical simulations of the friction stir welding of dissimilar metal joints is a daunting task given the complex issues involved such as the flow mixing action and the phase transformations. In this work, a 3D thermo-mechanical FE model is developed to simulate the dissimilar friction stir welding (DFSW) of aluminum-magnesium bi-metallic joints. The model is built using a manufacturing-processing-specific FEM software package (DEFORM 3D). Suitable constitutive laws are implemented to describe flow stress for both welded constituents: Al and Mg. The flow patterns of the stirring action from the simulations were verified against flow patterns of steel shots reported from experiments published in the literature. Also, the simulated interface patterns were found to be in agreement with microscopic images of welded sections taken from reported experiments. Furthermore, simulated temperature profiles favorably compare with temperature measurements previously published in the literature. The numerical model output includes relevant results such as material flow and volume fractions throughout the joint but most importantly in the recrystallized stir zone.

Effect of Friction Stir Welding pin Shape on Mechanical Properties of AA6061 Alloy Weldment

2013 ◽  
Vol 465-466 ◽  
pp. 1309-1313
Author(s):  
Mohd Hasbullah Idris ◽  
Mohd Shamsul Husin
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Friction Stir Welding ◽  
Material Flow ◽  
Weld Line ◽  
Butt Joint ◽  
Hardness Distribution ◽  
Plunge Depth ◽  
Friction Stir ◽  
Joint Properties

The present study is aimed to determine the effect of friction stir welding pin; square and diamond shape on mechanical properties of butt joint AA6061 weldment. Welding was carried out at different plunge depths of 0.0, 0.2, 0.3 and 0.4 mm together with rotation and transverse speeds of 500 rpm and 40 mm/min, respectively. Material flow, tensile strength and hardness of the weldment were evaluated. The results indicated that joint properties were significantly affected by tool design. It was found that material flow was higher for diamond pin tool compared to that of square pin resulting in considerable increased in tensile strength of the joint. In addition, the highest tensile strength was obtained on the samples welded with square shape pin at 0.4 mm plunge depth whilst the lowest was by diamond shape at the plunge depth of 0.0 mm. Regardless of pin shape and plunge depth; asymmetrical hardness distribution was observed for all weldments. The highest hardness was found to be close to the weld line produced by the diamond shaped pin at 0.0 mm plunge depth.

scholarly journals Effect of Different Tool Probe Profiles on Material Flow of Al–Mg–Cu Alloy Joined by Friction Stir Welding

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6296
Author(s):  
Anton Naumov ◽  
Evgenii Rylkov ◽  
Pavel Polyakov ◽  
Fedor Isupov ◽  
Andrey Rudskoy ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Friction Stir Welding ◽  
Dynamic Viscosity ◽  
Material Flow ◽  
Mechanical Performance ◽  
Strain Rates ◽  
Friction Stir ◽  
Cu Alloy ◽  
First Case ◽  
Positive Effect

Friction Stir Welding (FSW) was utilized to butt−join 2024–T4 aluminum alloy plates of 1.9 mm thickness, using tools with conical and tapered hexagonal probe profiles. The characteristic effects of FSW using tools with tapered hexagonal probe profiles include an increase in the heat input and a significant modification of material flow, which have a positive effect on the metallurgical characteristics and mechanical performance of the weld. The differences in mechanical properties were interpreted through macrostructural changes and mechanical properties of the welded joints, which were supported by numerical simulation results on temperature distribution and material flow. The material flow resulting from the tapered hexagonal probe was more complicated than that of the conical probe. If in the first case, the dynamic viscosity and strain rate are homogeneously distributed around the probe, but in the case of the tapered hexagonal probe tool, the zones with maximum values of strain rates and minimum values of dynamic viscosity are located along the six tapered edges of the probe.

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