Optimization of Parameters for the Friction Stir Processing and Welding of AA1050 Aluminum Alloy

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Alishavandi Mahdi; Ebadi Mahnam; Kokabi Amir Hossein

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Journal Paper

Paper Information

Journal: Iranian Journal of Materials Science and Engineering Year:2021 | Volume:18 | Issue:2 Page(s): 1-11

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Information Journal Paper

Title

Optimization of Parameters for the Friction Stir Processing and Welding of AA1050 Aluminum Alloy

Author(s)

Alishavandi Mahdi | Ebadi Mahnam | Kokabi Amir Hossein | Issue Writer Certificate

Keywords

friction stir processing

AA1050 aluminum alloy

tool probe shape

grain structure

mechanical properties

rotational and traverse speed

Abstract

Friction-Stir Processing (FSP) was applied on AA1050 aluminum alloy (AA) to find the highest mechanical properties among 28 combinations of the rotational and traverse speed (800-2000 rpm and 50-200 mm.min-1) and four different tool probe shapes (threaded, columnar, square and triangle). To this aim, the AA standard sheet went through a single pass of FSP. The 1600 rpm and 100 mm.min-1 with threaded tool probe was chosen as the best combination of rotational and traverse speed. Grain size at the Stirred Zone (SZ) was studied using Optical Microscopy (OM). The results showed that the SZ’s grain size was refined from 30 μm down to about 12 μm due to dynamic recrystallization during FSP. The processed sample exhibited improved hardness, yield stress, ultimate tensile strength, elongation up to 65, 80, 66, and 14%, respectively, compared to the annealed AA sample. Studying fractographic features by OM and field emission scanning electron microscope (FESEM) revealed a dominantly ductile fracture behavior.

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