scholarly journals Experimental and Numerical Analysis of Refill Friction Stir Spot Welding of Thin AA7075-T6 Sheets

Materials ◽  
2021 ◽  
Vol 14 (23) ◽  
pp. 7485
Author(s):  
Venkata Somi Reddy Janga ◽  
Mokhtar Awang ◽  
Mohd Fadillah Yamin ◽  
Uceu F. H. Suhuddin ◽  
Benjamin Klusemann ◽  
...  
Keyword(s):  
Numerical Model ◽  
Material Flow ◽  
Mechanical Model ◽  
Spot Welding ◽  
Three Dimensional ◽  
Friction Stir Spot Welding ◽  
Experimental Results ◽  
Thermal Cycles ◽  
Friction Stir ◽  
Joint Quality

The refill friction stir spot welding (refill FSSW) process is a solid-state joining process to produce welds without a keyhole in spot joint configuration. This study presents a thermo-mechanical model of refill FSSW, validated on experimental thermal cycles for thin aluminium sheets of AA7075-T6. The temperatures in the weld centre and outside the welding zone at selected points were recorded using K-type thermocouples for more accurate validation of the thermo-mechanical model. A thermo-mechanical three-dimensional refill FSSW model was built using DEFORM-3D. The temperature results from the refill FSSW numerical model are in good agreement with the experimental results. Three-dimensional material flow during plunging and refilling stages is analysed in detail and compared to experimental microstructure and hardness results. The simulation results obtained from the refill FSSW model correspond well with the experimental results. The developed 3D numerical model is able to predict the thermal cycles, material flow, strain, and strain rates which are key factors for the identification and characterization of zones as well for determining joint quality.

Numerical Simulation of Friction Stir Spot Welding

2016 ◽  
Vol 834 ◽  
pp. 43-48 ◽  
Author(s):  
Marius Adrian Constantin ◽  
Ana Boşneag ◽  
Monica Iordache ◽  
Claudiu Bădulescu ◽  
Eduard Niţu
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Spot Welding ◽  
Frictional Heating ◽  
Three Dimensional ◽  
High Strength Steels ◽  
High Strength ◽  
Friction Stir Spot Welding ◽  
Fe Model ◽  
Friction Stir

Friction Stir Spot Welding (FSSW) is a solid state joining process that relies on frictional heating and plastic deformation realized at the interaction between a non-consumable welding tool that rotates on the contact surfaces of the workpieces. Friction Stir Spot Welding (FSSW) is an evolving technique that has received considerable attention from automotive industries to replace electric resistance spot welding, which shows poor weldability for advanced high-strength steels as well as aluminium alloys. Because of the interest shown by the industry towards this process, an attempt to optimize it is imperative. But the experiments are often time consuming and costly. To overcome these problems, numerical analysis has frequently been used in the last years. The purpose of this paper is to develop a three-dimensional fully coupled thermal-stress finite element (FE) model of FSSW process for thin aluminium alloy Al 6061-T6. Numerical simulation being helpful for better understanding and observation of the influence of input parameters on the resulting phenomena. It is described the algorithm and are presented the activities needed to be performed in order to develop a valid numerical model for FSSW. The validation of the numerical model being achieved by comparing the resulted temperatures from the numerical simulation with the experimentally determined temperatures for the same material

Effect of Tool Geometry on Material Flow Behavior of Refill Friction Stir Spot Welding

2016 ◽  
Vol 70 (6) ◽  
pp. 1417-1430 ◽  
Author(s):  
Shude Ji ◽  
Yue Wang ◽  
Zhengwei Li ◽  
Yumei Yue ◽  
Peng Chai
Keyword(s):  
Material Flow ◽  
Spot Welding ◽  
Flow Behavior ◽  
Friction Stir Spot Welding ◽  
Tool Geometry ◽  
Friction Stir

Material flow during friction stir spot welding

2006 ◽  
Vol 11 (1) ◽  
pp. 61-71 ◽  
Author(s):  
P. Su ◽  
A. Gerlich ◽  
T. H. North ◽  
G. J. Bendzsak
Keyword(s):  
Material Flow ◽  
Spot Welding ◽  
Friction Stir Spot Welding ◽  
Friction Stir

scholarly journals Friction Stir Spot Welding of Aluminum and Copper: A Review

Materials ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 156 ◽  
Author(s):  
Mingshen Li ◽  
Chaoqun Zhang ◽  
Dayong Wang ◽  
Li Zhou ◽  
Daniel Wellmann ◽  
...  
Keyword(s):  
Material Flow ◽  
Spot Welding ◽  
Dissimilar Materials ◽  
Industrial Applications ◽  
Friction Stir Spot Welding ◽  
Research Progress ◽  
Current Status ◽  
Friction Stir ◽  
Dissimilar Metal ◽  
Metal Materials

Aluminum (Al) and copper (Cu) have been widely used in many industrial fields thanks to their good plasticity, high thermal conductivity and excellent electrical conductivity. An effective joining of dissimilar Al and Cu materials can make full use of the special characteristics of these two metals. Friction stir spot welding (FSSW), as an efficient solid-state welding method suitable for joining of dissimilar metal materials, has great prospects in future industrial applications. In this paper, the FSSW studies on Al-Cu dissimilar materials are reviewed. The research progress and current status of Al-Cu FSSW are reviewed with respect to tool features, macroscopic characteristics of welded joints, microstructures, defects in welds and mechanical properties of joints. In addition, some suggestions on further study are put forward in order to promote the development and progress of Al-Cu FSSW studies in several respects: material flow, thermal history, addition of intermediate layer, auxiliary methods and functionalization of Al-Cu FSSW joint.

Sign in / Sign up

Export Citation Format

Share Document