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.

scholarly journals A Cooler Weld

2003 ◽  
Vol 125 (03) ◽  
pp. D10-D16 ◽  
Author(s):  
Matt Hansen
Keyword(s):  
Friction Stir Welding ◽  
Solid State ◽  
Arc Welding ◽  
Federal Aviation Administration ◽  
Phase Changes ◽  
Fusion Welding ◽  
Friction Stir ◽  
State Process ◽  
Joining Technology ◽  
The Us

This article provides details of a low-temperature joining technology called friction stir welding. Friction stir welding (FSW) uses a cylindrical, shouldered tool with a profiled pin that is rotated and slowly plunged into the joint line between two pieces of sheet or plate material. According to an engineer, stir welding eliminated 60 percent of the rivets that the plane would have otherwise required. Eclipse Aviation Corp., Albuquerque, NM, is building a separate plant to house its stir welding operations for commercial production, once its plane receives certification by the US Federal Aviation Administration. FSW is a solid-state process, more like forging and extruding than to fusion welding. Since the process is solid state, the joint is not subject to any shrinkage because of phase changes. The process also introduces minimal heat into the weld, so the heat-affected zone is relatively small in comparison to arc welding.

scholarly journals Friction Stir Welding of Dissimilar Aluminum Alloy Combinations: State-of-the-Art

Metals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 270 ◽  
Author(s):  
Vivek Patel ◽  
Wenya Li ◽  
Guoqing Wang ◽  
Feifan Wang ◽  
Achilles Vairis ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Tool Geometry ◽  
Welding Parameters ◽  
Great Success ◽  
Lightweight Structures ◽  
Friction Stir ◽  
Dissimilar Aluminum Alloys ◽  
And Performance

Friction stir welding (FSW) has enjoyed great success in joining aluminum alloys. As lightweight structures are designed in higher numbers, it is only natural that FSW is being explored to join dissimilar aluminum alloys. The use of different aluminum alloy combinations in applications offers the combined benefit of cost and performance in the same component. This review focuses on the application of FSW in dissimilar aluminum alloy combinations in order to disseminate research this topic. The review details published works on FSWed dissimilar aluminum alloys. The detailed summary of literature lists welding parameters for the different aluminum alloy combinations. Furthermore, auxiliary welding parameters such as positioning of the alloy, tool rotation speed, welding speed and tool geometry are discussed. Microstructural features together with joint mechanical properties, like hardness and tensile strength measurements, are presented. At the end, new directions for the joining of dissimilar aluminum alloy combinations should guide further research to extend as well as to improve the process, which is expected to raise further interest on the topic.

Properties of welded joints of layered composite materials based on aluminum alloys

2020 ◽  
pp. 199-203
Author(s):  
V.V. Ovchinnikov ◽  
S.V. Yakutina ◽  
I.A. Kurbatova ◽  
E.V. Luk’yanenko
Keyword(s):  
Composite Material ◽  
Composite Materials ◽  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Arc Welding ◽  
Spot Welding ◽  
Layered Composite ◽  
Bend Angle ◽  
Butt Joints ◽  
Friction Stir

The properties and structure of the joints of the layered composite material based on aluminum alloys 1570— 1915—1570, made by resistance spot welding, automatic argon arc welding and friction stir welding are presented. The spot, lap and butt joints are made. The strength of the joints made by automatic argon arc welding with the AMg63 fi lling wire was 333...377 MPa at 180° bend angle. The butt joints obtained by the friction stir welding have strength factor of 0.90...0.92 from the strength of the base metal.

Mechanical property and characterization of 7A04-T6 aluminum alloys bonded by friction stir welding

2020 ◽  
Vol 52 ◽  
pp. 263-269 ◽  
Author(s):  
Jianing Li ◽  
Molin Su ◽  
Wenjun Qi ◽  
Chen Wang ◽  
Peng Zhao ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Friction Stir Welding ◽  
Aluminum Alloys ◽  
Friction Stir

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.

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