Fabrication of A1050-A6061 Functionally Graded Aluminum Foam by Friction Stir Processing Route

Shape memory based high performance nickel-titanium alloy particles were embedded by friction stir processing in graded concentration on the surface of light weight commercially pure magnesium cast plates. The novel functionally graded material so developed was analyzed for microhardness evolution and vibration damping effect. The nickel-titanium alloy particles were filled in a 2.5 wide × 3 mm deep slot and embedded on the surface by friction stir processing. A shallower slot 2.5 wide × 1.5 mm deep was milled over the previously embedded surface in which nickel-titanium alloy powder was again filled and embedded on the surface by second pass friction stir processing. This sequence of pass created the graded variation in nickel-titanium alloy concentration. The so fabricated functionally graded material was cut out from the plate and it was hot-forged to 2/3 thickness and subsequently quenched. The microstructural examination confirmed homogeneous dispersion of nickel-titanium alloy particles and clear interface between high and low concentration regions. The microhardness confirmed a uniform graded variation in hardness. The vibration damping tests confirm considerable improvement in the damping capacity of the fabricated functionally graded material.

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Compression Properties of Three-Layered Functionally Graded ADC12 Aluminum Foam Fabricated by Friction Stir Welding

MATERIALS TRANSACTIONS ◽

10.2320/matertrans.me201312 ◽

2013 ◽

Vol 54 (8) ◽

pp. 1268-1273 ◽

Cited By ~ 10

Author(s):

Yoshihiko Hangai ◽

Hiroto Kamada ◽

Takao Utsunomiya ◽

Soichiro Kitahara ◽

Osamu Kuwazuru ◽

...

Keyword(s):

Friction Stir Welding ◽

Aluminum Foam ◽

Functionally Graded ◽

Friction Stir ◽

Compression Properties

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Significance of Al2O3 addition in the aluminum 6063 metal foam formation through friction stir processing route – A comprehensive study

Proceedings of the Institution of Mechanical Engineers Part L Journal of Materials Design and Applications ◽

10.1177/14644207211034531 ◽

2021 ◽

pp. 146442072110345

Author(s):

Sharaf U Nisa ◽

Sunil Pandey ◽

PM Pandey

Keyword(s):

Friction Stir Processing ◽

Metal Foam ◽

Aluminum Matrix ◽

High Energy ◽

Processing Route ◽

Alumina Powder ◽

Foam Formation ◽

Porous Aluminum ◽

Friction Stir ◽

Blowing Agent

Closed-cell porous aluminum is expected to be a prominent material in near future because of its light weight, high specific modulus of elasticity, high energy absorption efficiency and high sound-insulating capacity in the automotive and aerospace industries. Recently, a new method of foaming has been developed in which a precursor is formed using friction stir processing. In the friction stir processing route, a precursor is fabricated by embedding a mixture of blowing agent powder and stabilization agent powder into aluminum alloy plates by the significant stirring action of friction stir processing. By applying the friction stir processing route precursor method, the cost-effective Al-foam formation along with high productivity can be accomplished. In this study, titanium hydride powder has been used as the blowing agent as it is reported to be most compatible with aluminum matrix. The effect of percentage of stabilization agent, i.e. alumina powder on porosity of aluminum foams formed using friction stir processing route is analyzed. The porous aluminum formed with three different percentages of alumina is observed and their porosity is calculated. Also, the compressive performance of the obtained samples is observed in order to examine the alumina powder addition on mechanical properties of the obtained metal foam. This study aims at analyzing the significance of addition of the alumina into the blowing agent while developing the metal foam through friction stir processing route.

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