Effect of Friction Stir Welding on Electrochemical Behavior of Pure Copper

2016 ◽  
Vol 69 (7) ◽  
pp. 1423-1434 ◽  
Author(s):  
Arash Fattah-alhosseini ◽  
Amir Hossein Taheri ◽  
Mohsen K. Keshavarz
Keyword(s):  
Friction Stir Welding ◽  
Electrochemical Behavior ◽  
Pure Copper ◽  
Friction Stir

scholarly journals Friction Stir Welding with Low-Medium-High Tool Travel Speed of 0.95 Mg-Al-Alloy and Pure Copper: Electrochemical and Surface Studies

2018 ◽  
Author(s):  
Neetesh Soni ◽  
Ambrish Singh
Keyword(s):  
Friction Stir Welding ◽  
Process Parameters ◽  
Pure Copper ◽  
Travel Speed ◽  
Localized Corrosion ◽  
Al Alloy ◽  
Kelvin Probe ◽  
Friction Stir ◽  
Surface Optical ◽  
Joining Process

The aim of this work is to assess the influence of Friction Stir Welding (FSW), process parameters, optimized tool traveling speed, and corrosion resistance of the 0.95 Mg-Al-alloy and pure copper weldment. Samples of aluminum-copper with and without deformation were characterized to investigate the metallurgical effects created during the welding deformation process. Effect of process parameters on microstructure and corrosion rate have been investigated for all the samples. All the electrochemical and polarization tests were done in 3.5 wt.% NaCl solution. Scanning Kelvin Probe (SKP) was done to detect the localized corrosion on the surface. Optical micrography observation indicated that the primary α-Al phase, which was formed during solidification can effectively limit the growth of Cu9Al4 phase. Finer acicular α-Al precipitates were observed in CuAl matrix during joining process that tends to coarser with the increase in tools travel speed. The electrochemical and polarization results showed that among all the tool travelling speed the specimen joined at tool travelling speed of 40 mm/min shows the best non-corrosive property.

scholarly journals Dissimilar Joining of Pure Copper to Aluminum Alloy via Friction Stir Welding

2018 ◽  
Vol 31 (11) ◽  
pp. 1183-1196 ◽  
Author(s):  
Farhad Bakhtiari Argesi ◽  
Ali Shamsipur ◽  
Seyyed Ehsan Mirsalehi
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Pure Copper ◽  
Friction Stir ◽  
Dissimilar Joining

Establishing the Dependence of Output Parameters Depending on Local Process Conditions for Friction Stir Welding of Pure Copper Plates

2018 ◽  
Vol 1146 ◽  
pp. 32-37 ◽  
Author(s):  
Marius Adrian Constantin ◽  
Ana Boşneag ◽  
Eduard Niţu ◽  
Lia Nicoleta Boţilă
Keyword(s):  
Friction Stir Welding ◽  
Process Parameters ◽  
Welding Speed ◽  
Frictional Heating ◽  
Pure Copper ◽  
Fusion Welding ◽  
Process Conditions ◽  
Friction Stir ◽  
Local Process ◽  
Welding Processes

Welding copper and its alloys is usually difficult to achieve by conventional fusion welding processes because of high thermal diffusivity of the copper, which is at least 10 times higher than most steel alloys, in addition to this, there are the well-known disadvantages of conventional fusion welding represented by necessity of using alloying elements, a shielding gas and a clean surface. To overcome these inconveniences, Friction Stir Welding (FSW), a solid state joining process that relies on frictional heating and plastic deformation, is being explored as a feasible welding process. In order to achieve an increased welding speed and a reduction in tool wear, this process is assisted by another one (TIG) which generates and adds heat to the process. The research includes two experiments for the FSW process and one experiment for tungsten inert gas assisted FSW process. The process parameters that varied were the rotational speed of the tool [rpm] and the welding speed [mm/min] while the compressive force remained constant. The purpose of this paper is to correlate the evolution of temperature, tensile strength, elongation and microscopic aspect with the linear position on the joint (local process parameters) for each experimental case and then make comparisons between them, and to identify and present the set of process parameters that has the best mechanical properties for this material.

scholarly journals Microstructure and Conductivity of the Al-Cu Joint Processed by Friction Stir Welding

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Yanni Wei ◽  
Hui Li ◽  
Peng Xiao ◽  
Juntao Zou
Keyword(s):  
Friction Stir Welding ◽  
Rotation Speed ◽  
Pure Copper ◽  
Compound Layer ◽  
Intermetallic Compound Layer ◽  
Interfacial Resistance ◽  
Cross Sectional ◽  
Interface Zone ◽  
Friction Stir ◽  
Good Surface

In this paper, 1060 aluminum and T2 pure copper were joined by friction stir welding. The influence of the rotation speed and inclination on the microstructure and mechanical properties of the joint were investigated. The microstructure and composition of the welded interface region were analyzed. The joints’ strength was tested, and the conductivity of the joints was estimated. Joints having good surface formation and defect-free cross section were successfully obtained. The cross-sectional morphologies of the Al-Cu friction stir welding joints can be divided into three zones: the shoulder impact zone, the weld nugget zone, and the interface zone. The interface zone consisted of a metallurgical reaction layer and a visible mixed structure. The reaction layers were identified as Al2Cu, Al4Cu9 phases. The tensile strength of the joints reaches maximum values of 102 MPa at a rotation speed of 950 rpm and inclination of 0°, which was approximately equal to those of 1060Al base metal. The resistivity of the Al-Cu joint was approximately equal to the theoretical resistivity. The interfacial resistance is directly affected by the joint defects, compound types, and thickness of the intermetallic compound layer.

Improving Friction Stir Welding between Copper and 304L Stainless Steel

2011 ◽  
Vol 409 ◽  
pp. 263-268 ◽  
Author(s):  
Yousef Imani ◽  
M.K. Besharati Givi ◽  
Michel Guillot
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Friction Stir Welding ◽  
Pure Copper ◽  
Dissimilar Materials ◽  
Metallographic Analysis ◽  
304L Stainless Steel ◽  
Friction Stir ◽  
Welding Direction ◽  
Fsw Experiments

As a solid-state welding technology, friction stir welding (FSW) can join dissimilar materials with good mechanical properties. In this paper, friction stir welding between 304L stainless steel and commercially pure copper plates with thicknesses of 3 mm was performed. A number of FSW experiments were carried out to obtain the optimum mechanical properties by adjusting the rotational speed to 1000 rpm and welding speed in the range of 14-112 mm/min and with an adjustable offset of the pin location with respect to the butt line. Microstructural analyses have been done to check the weld quality. Cross-sectioning of the welds for metallographic analysis in planes perpendicular to the welding direction and parallel to the weld crown was also performed. The mechanical properties of the welds were determined using a combination of conventional microhardness and tensile testing. From this investigation it is found that the offset of the pin is an essential factor in producing defect free welds in friction stir welding of copper and steel.

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