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FRACTURE TOUGHNESS AND FATIGUE CRACK GROWTH TESTS OF FRICTION STIR WELDED PLATES

Mokhtar, Siti Nur Farhin (2012) FRACTURE TOUGHNESS AND FATIGUE CRACK GROWTH TESTS OF FRICTION STIR WELDED PLATES. Universiti Teknologi Petronas. (Unpublished)

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Abstract

Friction stir welding has been demonstrated as a viable replacement to conventional fusion welding in various engineering applications. In most cases, the suitable welding parameters were selected based primarily on the tensile tests performed on welded test joints. In this project, a study on fracture toughness and fatigue crack growth of friction stir welded aluminium plates was performed. Two types of tests were conducted according to ASTM Standard Test Method £647-08 for fatigue crack growth and £399-08 for fracture toughness. The objectives of the project were to perform Fracture Toughness and Fatigue Crack Growth test on Friction Stir Welded aluminium plates, determining the plane strain fracture toughness K1c, establishing the rate of fatigue crack growth of the A6061 welded plates, and comparing those properties with non-welded A6061 plates. Friction stir welding was conducted using CNC milling machine with a tool pin of 8 mm length, pin diameter of 6 mm and shoulder diameter of 12 mm at 1600 rpm tool rotational speed, 12 mmlmin weld speed and 12s dwell time. The results indicated that the friction stir welded plates exhibited lower fracture toughness and higher cracks propagation rate than nonwelded plates.

Item Type: Final Year Project
Academic Subject : Academic Department - Mechanical Engineering - Manufacturing - Welding - Metal welding
Subject: T Technology > TP Chemical technology
Divisions: Engineering > Mechanical
Depositing User: Users 2053 not found.
Date Deposited: 22 Oct 2013 09:22
Last Modified: 25 Jan 2017 09:41
URI: http://utpedia.utp.edu.my/id/eprint/8948

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