Combination of nano-particle deposition system and friction stir spot welding for fabrication of carbon/aluminum metal matrix composite joints of dissimilar aluminum alloys

Friction stir welding (FSW) has been generating interest in association with friction stir processing (FSP), a new technique that employs FSW tooling. FSP is being investigated as a thermo-mechanical processing tool to transform a heterogeneous microstructure into a more homogenous microstructure.However, very little data is available on the use of FSW for processing composite materials. In this study, a novel method of local manufacture of metal matrix composites (MMCs) using FSW is proposed and its application to friction stir spot welding (FSSW) is described. Trials investigating local manufacture of aluminum oxide particulate reinforced 6063 Al by friction stirring were carried out on a modified milling machine. The results are discussed in terms of weldability and residual microstructure.

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Friction Stir Spot Welding with Additional Bonding of Thick Sheet Aluminum Joints

Metals ◽

10.3390/met9070732 ◽

2019 ◽

Vol 9 (7) ◽

pp. 732 ◽

Cited By ~ 3

Author(s):

Marcel Hatzky ◽

Antonia Frank ◽

Stefan Böhm

Keyword(s):

Aluminum Alloys ◽

Spot Welding ◽

Sheet Thickness ◽

High Strength ◽

Friction Stir Spot Welding ◽

Glass Beads ◽

Welding Parameters ◽

Thick Sheet ◽

Friction Stir ◽

Body Construction

The high-strength aluminum alloys offer great potential for realizing lightweight constructions in car body construction. However, the use of aluminum alloys increases the overall thickness of the material, which poses new challenges for potential joining processes. This paper examines a process combination of friction stir spot welding (FSSW) and bonding for 4 mm EN AW 6082-T6 sheets. For the investigations, adhesive or glass beads were applied between the joining components and then the sheets were welded using FSSW. The analysis shows that the adhesive and the glass beads have a very small influence on the joint formation. The use of glass beads in FSSW with bonding is recommended because less adhesive is displaced from the joint area, which increases the joint strength. The target of obtaining high weld spot strengths without strength-reducing adhesive burn-off could not be achieved because a certain residence time is necessary to form a weld spot with high strength at this sheet thickness in order to sufficiently plasticize the material. Adhesive burn-up cannot be completely avoided. For this reason, it is necessary to weigh up which characteristics are required for the specific application and adjust the welding parameters accordingly.

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Refill friction stir spot welding of surface-treated aerospace aluminum alloys with faying-surface sealant

Journal of Manufacturing Processes ◽

10.1016/j.jmapro.2019.04.027 ◽

2019 ◽

Vol 42 ◽

pp. 113-120 ◽

Cited By ~ 7

Author(s):

Enkhsaikhan Boldsaikhan ◽

Shintaro Fukada ◽

Mitsuo Fujimoto ◽

Kenichi Kamimuki ◽

Hideki Okada

Keyword(s):

Aluminum Alloys ◽

Spot Welding ◽

Friction Stir Spot Welding ◽

Friction Stir ◽

Faying Surface ◽

Surface Sealant

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Tool Path Design in Friction Stir Spot Welding of AA6082-T6 Aluminum Alloys

Sheet Metal 2007 - Key Engineering Materials ◽

10.4028/0-87849-437-5.767 ◽

2007 ◽

pp. 767-774 ◽

Cited By ~ 1

Author(s):

G. Buffa ◽

Livan Fratini ◽

Mario Piacentini

Keyword(s):

Aluminum Alloys ◽

Spot Welding ◽

Tool Path ◽

Friction Stir Spot Welding ◽

Friction Stir ◽

Path Design

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Trials of Developing a Magnetic Aluminum Metal Matrix Composite through Friction Stir Spot Forming

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.777.17 ◽

2018 ◽

Vol 777 ◽

pp. 17-21 ◽

Cited By ~ 2

Author(s):

Hamed Mofidi Tabatabaei ◽

Tetta Tajima ◽

Tadashi Nishihara

Keyword(s):

Magnetic Properties ◽

Aluminum Alloy ◽

Iron Oxide ◽

Metal Matrix Composite ◽

Matrix Composite ◽

Metal Matrix ◽

Friction Stir ◽

Aluminum Metal ◽

Aluminum Metal Matrix Composite ◽

Steel Balls

In present study, possibility of developing a new magnetic aluminum-based composite material by using principles of friction stir forming (FSF) is studied. Friction stir forming is a new materials forming technique which uses frictional heat to plasticize and plastically deform the alloy. Local magnetizing and local hardening of A6061 aluminum alloy is discussed by attempts of embedding and dispersing iron oxide powder and steel balls into A6061 aluminum alloy through spotted friction stir forming. Experiments revealed that FSF can be used to mechanically interlock steel balls and iron oxide with aluminum alloy and develop an aluminum metal matrix composite with improved magnetic properties. Results are discussed in terms of microstructural observation, hardness and magnetic properties.

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