Microstructure and Mechanical Properties of the Al/AlN Composite Layer Formed In Situ on Aluminum by FSP in the Presence of Nitrogen Gas

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Shamsipur Ali; Hojatian Farzad

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Paper Information

Journal: IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING Year:2019 | Volume:14 | Issue:38 Page(s): 69-78

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Information Journal Paper

Title

Microstructure and Mechanical Properties of the Al/AlN Composite Layer Formed In Situ on Aluminum by FSP in the Presence of Nitrogen Gas

Author(s)

Shamsipur Ali | Hojatian Farzad | Issue Writer Certificate

Keywords

Friction stir processingQ1

AluminumQ2

Surface compositeQ1

Aluminum nitrideQ2

WearQ2

Abstract

For the first time, nitrogen gas was used in Friction stir processing (FSP) to form an Al/AlN composite surface layer on Aluminum plate. Investigating the microstructure of the layers by X-ray diffraction, scanning electron microscopy and optical microscopy showed the formation of Aluminum nitride particles on the surface layer of commercially pure Aluminum. These particles found to have non-uniform distribution in the layer. While the percentage of composite reinforcements is not more than 10%, the Aluminum grain size reduced from 100 to 70 μ m due to restoring processes resulting from severe plastic deformation and significant improvement in surface properties observed. Due to extreme thermo-mechanical process, the surface layers have a finer grain size and high levels of hardness. As a result, the grain size ranged from an average of 100 μ m to 70 μ m and a hardness of 22 to a maximum of 38 Hv, which is about 1. 7 times the base metal hardness. The Wear resistance of the sample also improved up to 1. 1 times with respect to fine graining of the surface layer and the presence of hard nitride particles. The coefficient of friction reduced from 1. 2 to 0. 9, indicating an improvement in the tribological properties of the sample.

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APA: Copy

Shamsipur, Ali, & Hojatian, Farzad. (2019). Microstructure and Mechanical Properties of the Al/AlN Composite Layer Formed In Situ on Aluminum by FSP in the Presence of Nitrogen Gas. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, 14(38 ), 69-78. SID. https://sid.ir/paper/402386/en

Vancouver: Copy

Shamsipur Ali, Hojatian Farzad. Microstructure and Mechanical Properties of the Al/AlN Composite Layer Formed In Situ on Aluminum by FSP in the Presence of Nitrogen Gas. IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING[Internet]. 2019;14(38 ):69-78. Available from: https://sid.ir/paper/402386/en

IEEE: Copy

Ali Shamsipur, and Farzad Hojatian, “Microstructure and Mechanical Properties of the Al/AlN Composite Layer Formed In Situ on Aluminum by FSP in the Presence of Nitrogen Gas,” IRANIAN JOURNAL OF SURFACE SCIENCE AND ENGINEERING, vol. 14, no. 38 , pp. 69–78, 2019, [Online]. Available: https://sid.ir/paper/402386/en

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