Characterization of aluminum based functionally graded composites developed via friction stir processing

An Investigation was conducted to produce Aluminium based Functionally graded material (FGM) composites by Friction stir processing (FSP). A reinforcement strategy featuring the use of Alumina and TiC reinforcements was investigated, where holes were drilled in an Aluminium plate, filled with reinforcements and stirred using FSP. A mathematical model was formulated for positioning of holes in such a manner that the composition of the reinforcements varies from maximum to minimum over a given length. Samples were subjected to various number of FSP passes from one to three with 100% overlap and its influence on particle distribution and homogeneity was studied using Scanning electron microscopy (SEM) at cross sections parallel to the tool traverse direction. A progressive gradient in hardness values was observed for the surface composites at all the passes.

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Thermoluminescence Characterization of Rare Earth-Doped Yttrium Stannate Phosphors Deposited by Friction Stir Processing

Transactions of the Indian Institute of Metals ◽

10.1007/s12666-021-02486-1 ◽

2022 ◽

Author(s):

M. Durukan Gültepe ◽

A. Ege ◽

T. Küçükömeroğlu

Keyword(s):

Rare Earth ◽

Friction Stir Processing ◽

Friction Stir ◽

Rare Earth Doped

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Shape memory alloy based NiTi reinforced functionally graded material for vibration damping

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

10.1177/14644207211035521 ◽

2021 ◽

pp. 146442072110355

Author(s):

Namrata Gangil ◽

Arshad Noor Siddiquee ◽

Sameera Mufazzal ◽

SM Muzakkir ◽

Sachin Maheshwari

Keyword(s):

Titanium Alloy ◽

Shape Memory ◽

Functionally Graded Material ◽

Friction Stir Processing ◽

Vibration Damping ◽

Functionally Graded ◽

Nickel Titanium ◽

Friction Stir ◽

Alloy Particles ◽

Graded Material

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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