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Effect of Different Welding Tool Pin Shapes on Friction Stir Welding Plates Microstructure

Ilias, Ummu Hani (2012) Effect of Different Welding Tool Pin Shapes on Friction Stir Welding Plates Microstructure. Universiti Teknologi Petronas. (Unpublished)

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Abstract

Friction Stir Welding (FSW) is a method to join solid-state metal plates. This teclmi.que was started in 1991 and since then, many studies and research have been done in order. to improve this method. People are really interested in this technique because they realized this technique has more advantages and have many potential for improvement. In this project, the effect of different tool pin geometry on the welding plat<;'s microstructure will be investigated. Three different geometry tools pin, round, square, and triangular will be used to fabricate the joints. After that, the formations of friction stir plate's microstructural zone will be analyzed. There are several parameters that will effects the formation of the microstrutural zone. In this project, since our main purpose is to study the effect of tool pin profiles on the microstructure of friction stir weldinK plates, others parameter such as tool rotational speed, and welding speed, and axial force are constant. It is found that rectangular tools (Sample 5) have the best microstructure quality out of all three tools. Sample 5 shown smallest grain size. Smaller grain size is preferable because it result in more grain boundaries that strengthen the material. Grain boundaries increase the strength of aluminum by resisting the movement of dislocations in the microstructure. Therefore, more force is required to deform a material when it has large quantity of grain boundaries. In FSW, a good weld quality could be defined base on the strength of the joint To fulfill the desired strength, proper welding parameters should be selected.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Manufacturing - Welding - Metal welding
Subject: T Technology > TJ Mechanical engineering and machinery
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 30 Sep 2013 16:49
Last Modified: 25 Jan 2017 09:41
URI: http://utpedia.utp.edu.my/id/eprint/7318

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