Friction Stir Spot Welding of Advanced High-Strength Steels - A Feasibility Study

2005 ◽  
Author(s):  
Z. Feng ◽  
M. L. Santella ◽  
S. A. David ◽  
R. J. Steel ◽  
S. M. Packer ◽  
...  
Keyword(s):  
Feasibility Study ◽  
Spot Welding ◽  
High Strength Steels ◽  
High Strength ◽  
Friction Stir Spot Welding ◽  
Friction Stir ◽  
Advanced High Strength Steels

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

The Backing Bar Role in Heat Transfer on Aluminium Alloys Friction Stir Welding

2010 ◽  
Vol 636-637 ◽  
pp. 459-464 ◽  
Author(s):  
M.J.C. Rosales ◽  
N.G. Alcantara ◽  
Jorge Santos ◽  
R. Zettler
Keyword(s):  
Heat Transfer ◽  
Friction Stir Welding ◽  
Aluminium Alloys ◽  
High Strength Steels ◽  
High Strength ◽  
Advanced Materials ◽  
Mechanical Degradation ◽  
Great Effort ◽  
Friction Stir ◽  
Advanced High Strength Steels

Although new structural and advanced materials have been used in the automotive and aircraft industries, especially lightweight alloys and advanced high strength steels, the successful introduction of such materials depends on the availability of proven joining technologies that can provide high quality and performance joints. Solid-state joining techniques such as Friction Stir Welding (FSW) are a natural choice since their welds are produced at low temperatures, so the low heat input provides limited, slight distortion, microstructural and mechanical degradation. Great effort has currently been devoted to the joining of Al-Cu-Mg and the Al-Mg-Si alloys because of their high strength, improved formability, and application in airframe structures. FSW is a continuous, hot shear, autogenous process involving a non-consumable and rotating tool plunged between two abutting workpieces. The backing bar plays an important role in heat transfer from stir zone (SZ), which can influence the weld microstructure as well as the consolidation of material in the root of the join. This study aims at investigating issues concerning heat generation, within the SZ of friction stir welded aircraft aluminium alloys.

Resistance spot welding and weldbonding of advanced high strength steels

2010 ◽  
Vol 41 (11) ◽  
pp. 931-939 ◽  
Author(s):  
G. Weber ◽  
H. Thommes ◽  
H. Gaul ◽  
O. Hahn ◽  
M. Rethmeier
Keyword(s):  
Resistance Spot Welding ◽  
Spot Welding ◽  
High Strength Steels ◽  
High Strength ◽  
Resistance Spot ◽  
Advanced High Strength Steels
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