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Impact of Dry Friction Stir Processing on Microstructure, Micro-Hardness and Tensile Characteristics of Mg-Al-Zn Alloy

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Abstract:

Mg-Al-Zn alloy, an Mg alloy having Al and Zn as the major constituents, is exceptionally lightweight and has potential to become an essential component of modern engineering applications and healthcare systems. This paper presents valuable insights to the friction stir processing (FSP) applied to Mg-Al-Zn alloy in dry conditions. FSP induced extreme plastic deformation in the metal alloy which causes substantial microstructural alterations. These changes were investigated using optical microscope. Microstructural evaluation of FSP-processed zone indicated that average grain diameter of the FSP-processed zone increased in proportion to tool rotating speed. This is attributed to the frictional zone's degree of plastic deformation. In alignment with results obtained from optical microscopy, morphological study conducted using scanning electron microscope (SEM) also demonstrated the synthesis of refined grains. In addition, the study includes evaluation of the FSP-processed alloy's micro-hardness and tensile characteristics in contrast to the base (unprocessed) alloy.

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Periodical:

Key Engineering Materials (Volume 1036)

Pages:

27-36

DOI:

https://doi.org/10.4028/p-4uNckL

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Online since:

December 2025

Authors:

Sambeet Kumar Sahu*

Keywords:

AZ91 Alloy, Elongation, FSP, Microstructure, Tensile Strength

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© 2025 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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