Influence of Microstructure of Friction Stir Welded Joints on Growth and Properties of Microarc Oxidation Coatings on Az31b Magnesium Alloy

The effects of underwater friction stir welding (UFSW) on mechanical properties, strain hardening behavior, and formability of dissimilar materials of AA5052-O and AA6061-T6 welded joints were investigated. The mechanical properties of the UFSW joints exhibited higher strength and higher joint efficiency than the conventional friction stir welded joints (CFSW). The maximum joint efficiency of 73% has been attained for UFSW joints, which is due to the effect of welding atmosphere. The hardness of the stir zone (SZ) and heat affected zone (HAZ) are also obtained higher for the UFSW joints. Moreover, the hardening capacity, strain hardening exponent and formability of the UFSW joints were greatly improved over the CFSW joints. The improvement in mechanical properties of the UFSW joints is mainly due to faster cooling rate during welding. The microstructural characteristics revealed the formation of fine grains in the UFSW joints compared to the CFSW joints.

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Analysis and Characterization of Forming Behavior on Dissimilar Joints of Aa5052-O to Aa6061-T6 Using Underwater Friction Stir Welding

Babu

Muthukumaran

Narayanan

et al. 2019

Surf. Rev. Lett.

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Modeling and Optimization of Process Parameters of the Piston Alloy-Based Composite Produced by FSP Using Response Surface Methodology

et al. 2023

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In this paper, A356/B4C composites were fabricated using the friction stir processing (FSP) method. The process’s input parameters, including rotational and transverse speed, were optimized using the response surface methodology (RSM). Three factors and three levels with nine experimental runs made up the design of the experiments. An analysis of variance (ANOVA) was employed to determine whether the constructed model was adequate at a 95% confidence level. This study found that transverse speed was the most critical variable affecting the composites’ silicon (Si) particle size, UTS, and force. The findings demonstrate that the Si particle size of the parent material and the dispersion quality of B4C particles in the aluminum matrix are considerably influenced by the FSP factors, such as rotating speed and transverse speed. Second, tests for tensile strength were conducted to examine the composites’ mechanical properties. Then, using a specially designed fixture to measure force during the process, the forces on the tool, which play a decisive role in determining the tool’s life, were measured in different input parameters. The findings demonstrate that FSP transforms the mechanism of the fracture from brittle to extremely ductile in composites from the as-received metal.

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Influence of Microstructure of Friction Stir Welded Joints on Growth and Properties of Microarc Oxidation Coatings on Az31b Magnesium Alloy

Cited by 2 publications

References 27 publications

Analysis and Characterization of Forming Behavior on Dissimilar Joints of Aa5052-O to Aa6061-T6 Using Underwater Friction Stir Welding

Analysis and Characterization of Forming Behavior on Dissimilar Joints of Aa5052-O to Aa6061-T6 Using Underwater Friction Stir Welding

Modeling and Optimization of Process Parameters of the Piston Alloy-Based Composite Produced by FSP Using Response Surface Methodology

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