Effect of processing parameters on static strength of dissimilar friction stir spot welds between different aluminium alloys

2007 ◽  
Vol 30 (2) ◽  
pp. 143-148 ◽  
Author(s):  
Y. TOZAKI ◽  
Y. UEMATSU ◽  
K. TOKAJI
Keyword(s):  
Aluminium Alloys ◽  
Processing Parameters ◽  
Static Strength ◽  
Spot Welds ◽  
Friction Stir

The Use of Bobbin Tools for Friction Stir Welding of Aluminium Alloys

2010 ◽  
Vol 638-642 ◽  
pp. 1179-1184 ◽  
Author(s):  
Philip L. Threadgill ◽  
M.M.Z. Ahmed ◽  
Jonathan P. Martin ◽  
Jonathan G. Perrett ◽  
Bradley P. Wynne
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Friction Stir Welding ◽  
Cross Section ◽  
Axial Force ◽  
Aluminium Alloys ◽  
Processing Parameters ◽  
Machine Design ◽  
Friction Stir ◽  
Triangular Zone

The use of a double sided friction stir welding tool (known as a bobbin tool) has the advantage of giving a processed zone in the workpiece which is more or less rectangular in cross section, as opposed the triangular zone which is more typically found when conventional friction stir welding tool designs are used. In addition, the net axial force on the workpiece is almost zero, which has significant beneficial implications in machine design and cost. However, the response of these tools in generating fine microstructures in the nugget area has not been established. The paper presents detailed metallographic analyses of microstructures produced in 25mm AA6082-T6 aluminium wrought alloy, and examines grain size, texture and mechanical properties as a function of processing parameters and tool design, and offers comparison with data from welds made with conventional tools.

A comprehensive review on the effect of precipitation on mechanical properties of friction stir welded aluminium alloys

2021 ◽  
pp. 095440622110115
Author(s):  
C Shyamlal ◽  
S Rajesh ◽  
S Suresh Kumar
Keyword(s):  
Mechanical Properties ◽  
Aluminium Alloys ◽  
Joint Strength ◽  
Welded Joint ◽  
Welding Process ◽  
Processing Parameters ◽  
Noticeable Effect ◽  
Comprehensive Review ◽  
Friction Stir

Friction Stir Welding (FSW) is one of the excellent metals joining processes in terms of joint strength efficiency, quality of the weld and eco-friendliness. The strength of the joint and quality of the weld depend upon the FSW processing parameters. This paper aims to provide overview of the FSW process by considering the effect of alloying elements and its precipitates on mechanical properties of aluminium and its alloys. The importance of grain growth and its effect on mechanical properties after welding is also analysed and discussed in detail. The interesting observation is that the precipitates and its size, residual stress play an important role in changing the hardness, tensile strength and fatigue strength across the weld zones. In general, the hardness of the stir zone is lesser when compared to base metal and this is noticed for all series of aluminium and its alloys, irrespective of the precipitates and its structure. Grain size and its morphology also have significant role in affecting the mechanical properties of the welded joint and it is found that post welding process has noticeable effect on the mechanical properties closer to base aluminium and its alloys.

scholarly journals Effects of processing parameters on mechanical, material flow and wear behaviour of friction stir welded 6101-T6 and 7075-T651 aluminium alloys

2020 ◽  
Vol 7 ◽  
pp. 1 ◽  
Author(s):  
Olatunji P. Abolusoro ◽  
Esther T. Akinlabi
Keyword(s):  
Rotational Speed ◽  
Aluminium Alloys ◽  
Material Flow ◽  
Travel Speed ◽  
Processing Parameters ◽  
Wear Behaviour ◽  
Tensile Behaviour ◽  
Nugget Zone ◽  
Friction Stir ◽  
Dissimilar Friction Stir Welding

Dissimilar friction stir welding (FSW) between 6101-T6 and 7075-T651 aluminium alloys was conducted. Three different parameters each were investigated for rotational speed and travel speed, and the effects of these parameters on the tensile behaviour, hardness and wear were evaluated. The results indicate that the ultimate tensile strength increases with an increase in the feed rate. However, the increase in rotational speed decreases the ultimate tensile values. The fractured analysis of the tensile samples shows similarities in the fractured pattern as all the samples failed at heat affected zone close to the 6101-T6 alloy. The hardness varies across the heat affected zones and nugget zone both at constant rotational speed and welding speeds. The highest resistance to wear occurred at 65 mm min−1 and 1850 rpm welding speed and rotational speed respectively while better material mixing was achieved at the nugget zone of the welds at 1250 rpm and 110 mm/min.

The Influence of Processing Parameters on Microstructure of Al 5754 Friction Stir Spot Welds

2006 ◽  
Vol 519-521 ◽  
pp. 1107-1112 ◽  
Author(s):  
A. Gerlich ◽  
G. Avramovic-Cingara ◽  
T.H. North
Keyword(s):  
Processing Parameters ◽  
Spot Welds ◽  
Friction Stir
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