Design of Joint Properties by Friction Powder Processing

2010 ◽  
Vol 638-642 ◽  
pp. 2058-2063 ◽  
Author(s):  
Koji Inada ◽  
Hidetoshi Fujii ◽  
Young Su Ji ◽  
Yoshiaki Morisada ◽  
Kiyoshi Nogi
Keyword(s):  
Friction Stir Welding ◽  
Powder Processing ◽  
Friction Stir ◽  
Probe Diameter ◽  
Shoulder Diameter ◽  
Joint Properties ◽  
First Pass ◽  
Al Powder ◽  
Pure Cu ◽  
Grain Diameter

Friction powder processing (FPP) has been developed based on the principle of friction stir welding (FSW) or friction stir processing (FSP). The FPP is a method to design the properties of the processed area by performing FSP after powder with a controlled composition is placed in the gap between two plates. The FPP experiments were performed using a tool with the shoulder diameter of 15mm and the probe diameter of 6mm. The tool traveled at 100mm/min and rotated at 1500rpm. A1050 aluminum was used as the plate. Pure Al powder (89μm average grain diameter) and pure Cu powder (106μm average grain diameter) were used as the additives. When using pure Al powder, the pure Al powder left in the base metal after the first pass is sufficiently stirred by performing the second pass and then a good joint without defects is obtained. However, more than three passes are not effective for improving the strength of the welded area. When using pure Cu powder, nanoscale Al2Cu precipitates are uniformly formed in the stir zone, and accordingly, the hardness is significantly increased.

Tool Geometry for Friction Stir Welding—Optimum Shoulder Diameter

2011 ◽  
Vol 42 (9) ◽  
pp. 2716-2722 ◽  
Author(s):  
M. Mehta ◽  
A. Arora ◽  
A. De ◽  
T. DebRoy
Keyword(s):  
Friction Stir Welding ◽  
Tool Geometry ◽  
Friction Stir ◽  
Shoulder Diameter

Effects of Tool Pin Profile and Tool Shoulder Diameter on the Tensile Behaviour of Friction Stir Welded Joints of Aluminium Alloys

2014 ◽  
Vol 984-985 ◽  
pp. 586-591 ◽  
Author(s):  
R. Ashok Kumar ◽  
M.R. Thansekhar
Keyword(s):  
Friction Stir Welding ◽  
Aluminium Alloy ◽  
Tensile Properties ◽  
Welded Joints ◽  
Tensile Behaviour ◽  
Light Weight ◽  
Friction Stir ◽  
Tool Shoulder ◽  
Shoulder Diameter ◽  
Weight Structures

— For fabricating light weight structures, it requires high strength-to weight ratio. AA6061 aluminium alloy is widely used in the fabrication of light weight structures. A356 aluminium alloy has wide spread application in aerospace industries. Friction stir welding is solid state joining process which is conducting for joining similar and dissimilar materials. The friction stir welding parameters play an important role for deciding the strength of welded joints. In this investigation, A356 and AA6061 alloys were friction stir welded by varying triangular, square, hexagonal pin profiles of tool keeping the remaining parameters same and AA6061 alloys were friction stir welded by varying tool shoulder diameter as 12mm,15mm,18mm without changing other parameters. Tensile properties of each joint have been analyzed microscopically. From the experimental results, it is observed that hexagonal pin profiled tool and 15mm shoulder diameter tool provides higher tensile properties when compared to other tools.

Measurement and evaluation of joint properties in friction stir welding of ABS sheets reinforced by nanosilica addition

Measurement ◽  
2018 ◽  
Vol 127 ◽  
pp. 198-204 ◽  
Author(s):  
Reza Bagherian Azhiri ◽  
Ramin Mehdizad Tekiyeh ◽  
Ebrahim Zeynali ◽  
Masoud Ahmadnia ◽  
Farid Javidpour
Keyword(s):  
Friction Stir Welding ◽  
Friction Stir ◽  
Joint Properties ◽  
Measurement And Evaluation

The joint properties of dissimilar aluminum plates joined by friction stir welding

2010 ◽  
Vol 101 (5) ◽  
pp. 692-699 ◽  
Author(s):  
Furkan Sarsilmaz ◽  
Ulaş Çaydaş ◽  
Ahmet Hasçalik ◽  
Levent Tanriover
Keyword(s):  
Friction Stir Welding ◽  
Friction Stir ◽  
Joint Properties ◽  
Aluminum Plates

An overview of R&D work in friction stir welding at SMU

10.30544/381 ◽  
2006 ◽  
Vol 12 (4) ◽  
pp. 275-295 ◽  
Author(s):  
V. SOUNDARARAJAN ◽  
M. VALANT ◽  
R. KOVACEVIC
Keyword(s):  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Arc Welding ◽  
Production Costs ◽  
Friction Stir ◽  
Dissimilar Metal ◽  
Joining Technology ◽  
Joint Properties ◽  
Dissimilar Alloys ◽  
And Performance

Friction stir welding (FSW) is an innovative solid-state material joining method invented by The Welding Institute (TWI) in 1991 and has been one of the most significant joining technology developments in the last two decades. It has evolved into a process focused on joining arc weldable (5xxx and 6xxx) and unweldable (2xxx and 7xxx) aluminum alloys to a point where it can be implemented by the aerospace and automotive industries for their joining needs.Research towards the further extension of the process to join dissimilar metal combinations like Fe-Al and Al-Cu is currently underway. A few of the important advantages of FSW over conventional joining techniques include improved joint properties and performance, low-deformation of the workpieces, a significant reduction in production costs and the freeing of skilled labor for use in other tasks. Compared to the conventional arc-welding of aluminum alloys, FSW produces a smaller heat affected zone, and it also allows the successful joining of aluminum alloys, steel, titanium, and dissimilar alloys with a stronger joint.

The Effect of Top Surface Lubrication on the Friction Stir Welding of Polycarbonate Sheets

2021 ◽  
Vol 36 (1) ◽  
pp. 94-102
Author(s):  
M. M. Z. Ahmed ◽  
A. Elnaml ◽  
M. Shazly ◽  
M. M. El-Sayed Seleman
Keyword(s):  
Tensile Strength ◽  
Friction Stir Welding ◽  
Rotation Speed ◽  
Transverse Cross Section ◽  
Joint Zone ◽  
Friction Stir ◽  
Tool Shoulder ◽  
Shoulder Diameter ◽  
Fsw Parameters ◽  
Spherulitic Structure

Abstract In this work, top surface lubrication during friction stir welding of polycarbonate sheets was applied. A homogenous layer of Paraffin wax has been placed on the top surface of the joint area with a width that ensures to cover the shoulder diameter. Then FSW was applied using conventional FSW tool with rotating pin and shoulder at different FSW parameters (Rotation speeds of 1 000, 1500, 2 000 min–1 and welding speeds of 25, 50, 75,100 mm/min). The main objective of using the wax is to act as a lubricant that reduces the friction between the shoulder and the polycarbonate surface. The joints produced were investigated in terms of surface quality, internal defects, and mechanical properties. During FSW the wax is melted and played as lubricant between the tool shoulder and the polycarbonate surface and resulted in defect-free surface with no thickness reduction of the original plate. The transverse cross-section showed defect-free joints for the majority of the FSW parameters investigated. Tensile testing results showed a reduction of the tensile strength after FSW, and an enhancement in the tensile strength with the increase of welding speed or rotation speed. The fracture occurs at the joint zone and the fracture surface investigation using SEM showed the existence of spherulitic structure in the weld joint.

Effect of Shoulder Diameter on the Resulting Interfacial Regions of Friction Stir Welds between Aluminium and Copper

2011 ◽  
Vol 299-300 ◽  
pp. 1146-1150
Author(s):  
Esther Titilayo Akinlabi ◽  
Stephen Akinlabi
Keyword(s):  
Friction Stir Welding ◽  
Feed Rate ◽  
Rotational Speed ◽  
Force Feedback ◽  
Welding Process ◽  
Microstructural Characterization ◽  
Stir Zone ◽  
Vertical Force ◽  
Friction Stir ◽  
Shoulder Diameter

This paper reports the effect of shoulder diameter on the resulting interfacial regions of joints between aluminium and copper produced by the friction stir welding process. The welds were produced using three shoulder diameter tools, viz; 15, 18 and 25 mm. This paper focuses on welds produced at a constant rotational speed of 600 rpm and feed rate of 50 mm/min varying the shoulder diameters. Analysis of the force feedback revealed that the advancing force, the downward vertical force and the torque increases as the shoulder diameter increases. Microstructural characterization was conducted on the joint interfaces and it was observed that the widths of the interfacial regions comprising of the Stir Zone and the Thermo – Mechanically Affected Zone (TMAZ) increases as the shoulder size increases.

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