Mechanical and Fine-Grain Structure Properties to Improve Ultrasonic-Assisted Surface Ball Deep Rolling of Aluminum Sheets AA6061-T6

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Bagheri Bami A.R.; AMINI S.; TEYMOURI R.

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Journal: Modares Mechanical Engineering Year:2020 | Volume:20 | Issue:2 Page(s): 483-496

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Title

Mechanical and Fine-Grain Structure Properties to Improve Ultrasonic-Assisted Surface Ball Deep Rolling of Aluminum Sheets AA6061-T6

Author(s)

Bagheri Bami A.R. | AMINI S. | TEYMOURI R. | Issue Writer Certificate

Keywords

UltrasonicQ1

Tensile TestQ1

TopographyQ2

RoughnessQ2

HardnessQ2

Abstract

The ball deep rolling process is used to improve the surface properties of the workpiece. In this research, the optimum state was determined using the design of the experiment to improve the properties including optimum Hardness and Roughness. It was determined 3 passes and the type of traditionally and Ultrasonic process and proposed regression model at the speed of 1000mm/min. In this case, it showed the Hardness of 131 micro vickers and also determined minimum Roughness in the mean Roughness of 0. 179 microns and the maximum Roughness of 1. 01 microns. The microstructure and Tensile Tests have been investigated in the optimal sample, compared to the surface topographic reference sample. The microstructure has been shown the decreases from about 30-50 microns to about 300 nanometers in thickness at about 50 microns below the surface by scanning electron microscopy. The tensile stress and percentage increase in length were determined by 10% and 29% increase, respectively by the tensile strength test. Topography has also shown the reduction of Roughness by 40%. The Hardness of the subsurface was studied in the thickness of the workpiece and it was compared to the same traditional and modern optimum specimen. The result showed the effect of increasing the Hardness due to the of the structure fracture and strain rate.

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APA: Copy

Bagheri Bami, A.R., AMINI, S., & TEYMOURI, R.. (2020). Mechanical and Fine-Grain Structure Properties to Improve Ultrasonic-Assisted Surface Ball Deep Rolling of Aluminum Sheets AA6061-T6. MODARES MECHANICAL ENGINEERING, 20(2 ), 483-496. SID. https://sid.ir/paper/178295/en

Vancouver: Copy

Bagheri Bami A.R., AMINI S., TEYMOURI R.. Mechanical and Fine-Grain Structure Properties to Improve Ultrasonic-Assisted Surface Ball Deep Rolling of Aluminum Sheets AA6061-T6. MODARES MECHANICAL ENGINEERING[Internet]. 2020;20(2 ):483-496. Available from: https://sid.ir/paper/178295/en

IEEE: Copy

A.R. Bagheri Bami, S. AMINI, and R. TEYMOURI, “Mechanical and Fine-Grain Structure Properties to Improve Ultrasonic-Assisted Surface Ball Deep Rolling of Aluminum Sheets AA6061-T6,” MODARES MECHANICAL ENGINEERING, vol. 20, no. 2 , pp. 483–496, 2020, [Online]. Available: https://sid.ir/paper/178295/en

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