Volume 4, Issue 1 (Journal OF Welding Science and Technology of Iran 2018)                   JWSTI 2018, 4(1): 43-54 | Back to browse issues page

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Tavoosi M, Arjmand S, Solgi S. The Influence of Heat-Input on Structural and Mechanical Properties of 2205 Duplex Stainless Steel. JWSTI 2018; 4 (1) :43-54
URL: http://jwsti.iut.ac.ir/article-1-122-en.html
1- Malek-Ashtare university of Technology , ma.tavoosi@gmail.com
2- Malek-Ashtare university of Technology
Abstract:   (5555 Views)

The influence of heat-input and pre-heat treatment on the structure, mechanical and corrosion behaviors of 2205 duplex stainless steel joint by means of GMAW process was the goal of this study. In this regards, the welding process was done using different heat input in the range of 0.6 to 1.4 kJ/mm and different pre-heating treatments in the range of 25 to 100 oC. The microstructural properties of prepared samples were evaluated using x-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques. Based on archived results, the microstructure of as-welded samples were combinations of Widmaneshtaten austenite which nucleated from boundaries and growth toward central part of ferrite grains. By increasing the heat-input, the percentages of ferrite and austenite phases decreased and increased, respectively. In this condition, the highest value of strength and ductility was achieved in as-weld samples with medium (1.0 kJ/mm) heat-input. The corrosion studies showed that the heat-input has negligible effects on corrosion behaviors of 2205 duplex stainless steel joint. It was also found that the pre-heating treatment has adverse effect on the mechanical properties of the junction.    

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Type of Study: Research | Subject: Special

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