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Volume 13, Issue 25 (9-2017)
Marine Engineering 2017, 13(25): 77-90 |
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ahmadi M, farzadi A, Yazdipour A. Effect of Repeated Repair on Microstructure, Mechanical Properties and Corrosion Behavior of 5083-H321 Aluminum Alloy Welded Joints Using Pulsed MIG. Marine Engineering 2017; 13 (25) :77-90
URL: http://marine-eng.ir/article-1-536-en.html
URL: http://marine-eng.ir/article-1-536-en.html
1- 1Advanced Materials Research Center, Faculty of Materials Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
2- Assistance professor, Department of Mining and Metallurgical Engineering, Amirkabir University of technology, Tehran, Iran
3- Director of the Research Department of Welding Engineering, Institute of Materials Engineering, University Complex materials and manufacturing technologies, Malek Ashtar University of technology campus-Tehran
2- Assistance professor, Department of Mining and Metallurgical Engineering, Amirkabir University of technology, Tehran, Iran
3- Director of the Research Department of Welding Engineering, Institute of Materials Engineering, University Complex materials and manufacturing technologies, Malek Ashtar University of technology campus-Tehran
Abstract: (4123 Views)
In the marine industries, defects in welded joints are repaired to improve the performance. It is possible that a welded joint is repaired once or twice. In this research, effect of repair on microstructure, mechanical properties and corrosion behavior of welded joints of 5083-H321 aluminum alloy using pulsed MIG process was investigated. The results show that excess heat due to increasing the number of repair causes recrystallization, grain growth and increasing the grain size in the heat affected zone. The results of tensile test and micro hardness show loss of mechanical properties in heat affected zone of the sample that subjected to repair twice. Also, this sample shows a substantially passive region in the weld metal and the heat affected zone and hence more stable resistance to pitting corrosion.
Type of Study: Research Paper |
Subject:
Marine Structures and near shore
Received: 2016/08/30 | Accepted: 2017/02/9
Received: 2016/08/30 | Accepted: 2017/02/9
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