Experimental evaluation of strain and strain rate during rapid cooling friction stir welding of pure copper

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.

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

Acta Metallurgica Sinica (English Letters) ◽

10.1007/s40195-018-0741-5 ◽

2018 ◽

Vol 31 (11) ◽

pp. 1183-1196 ◽

Cited By ~ 11

Author(s):

Farhad Bakhtiari Argesi ◽

Ali Shamsipur ◽

Seyyed Ehsan Mirsalehi

Keyword(s):

Aluminum Alloy ◽

Friction Stir Welding ◽

Pure Copper ◽

Friction Stir ◽

Dissimilar Joining

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Experimental Investigation on Friction Stir Welding of Dissimilar Alloys AA7075 and Pure Copper: Effect of Tool Material and Process Parameters on Mechanical Properties

Lecture Notes in Mechanical Engineering - Advances in Materials and Manufacturing Engineering ◽

10.1007/978-981-15-1307-7_60 ◽

2020 ◽

pp. 533-540

Author(s):

B. Supraja Reddy ◽

B. Ram Gopal Reddy

Keyword(s):

Mechanical Properties ◽

Experimental Investigation ◽

Friction Stir Welding ◽

Process Parameters ◽

Pure Copper ◽

Tool Material ◽

Friction Stir ◽

Dissimilar Alloys ◽

Copper Effect

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1146.32 ◽

2018 ◽

Vol 1146 ◽

pp. 32-37 ◽

Cited By ~ 1

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.

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