Repairing cracked aluminum plates by aluminum patch using diffusion method
Autor: | Mehdi Tajdari, Sobhan Dehghanpour, A. R. Nezamabadi, Farzan Barati, Mohammad Mahdi Attar |
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Rok vydání: | 2019 |
Předmět: |
0209 industrial biotechnology
Materials science Bar (music) Mechanical Engineering Diffusion Composite number chemistry.chemical_element Fractional factorial design 02 engineering and technology 020303 mechanical engineering & transports 020901 industrial engineering & automation 0203 mechanical engineering chemistry Mechanics of Materials Aluminium Ultimate tensile strength Adhesive Composite material Diffusion bonding |
Zdroj: | Journal of Mechanical Science and Technology. 33:4735-4743 |
ISSN: | 1976-3824 1738-494X |
DOI: | 10.1007/s12206-019-0914-9 |
Popis: | The aim of this work is to scrutinize the importance of diffusion bonding temperature, pressure and time on the repair of a cracked aluminum plate while the maximum tensile strength under a quasi-static loading has been investigated. The diffusion method was used to connect aluminum patches to repair the central and mode I cracks in thin aluminum plates. Here, the process of repairing cracked pieces made of aluminum or aluminum alloys involved a chemical and mechanical step to remove aluminum oxide and press the patch and piece under the temperature difference at a certain time. The repaired pieces underwent a quasi-static tensile loading while the maximum tolerable amount of force was obtained in different situations. Having assigned five temperatures, 300, 400, 500, 550 and 600 C, as well as four test times 30, 60, 120 and 180 min and five different pressures 10, 20, 50, 80 and 110 bar, we utilized fractional factorial design approach to perform 40 tests while there was seen a 10 mm initial crack in repaired samples. Experimental results showed that the optimum connection was resulted at 550 °C and the pressure of 80 bars within 120 min where the maximum force tolerated by the repaired vs. the unrepaired piece increased by 92 %. Therefore, having weighed the repair method using the diffusion bonding, we suggest that this type of the repair method can be a proper and cheap alternative to composite and adhesive patches. |
Databáze: | OpenAIRE |
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