| Â
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| | found to be preferential precipitation
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| The gas tungston arc welding (GTAW)is
| |
| | sites.
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| employed for welding of thin plates.In
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| | To prevent this the process is carried
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| GTAW of standard 2205 duplex stainless
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| | out above 1050°C.Above 1050 °C, the
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| steel ( DSS) plate of 5 mm thickness,
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| | volume fraction of ? ferrite increases
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| which is having 22.37% Cr and 5.74% Ni is
| |
| | with annealing temperature. The increase
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| used in this study. Weld beads were
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| | of ? ferrite occurs at a faster rate in
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| produced with ER 2209 filler wire of
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| | the HAZ than in the base metal and fusion
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| higher alloy content (22% Cr and 9% Ni).
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| | zone. Optimal mechanical properties and
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| The shielding gas Argon was employed in
| |
| | an acceptable ferrite/ austenite ratio
|
| this work. The interpass temperatures
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| | throughout the weld regions corresponds
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| were kept as 1100 C.
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| | to annealing at 1050 °C.
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| The phase transformations and mechanical
| |
| | The main aim of this work is to
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| behaviour during welding and
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| | investigate the defect in the weldment by
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| subsequent.Annealing treatment of 2205
| |
| | the use of x-ray (NDT). The macro and
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| duplex stainless steel have been
| |
| | microstructure examinations, as well as
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| investigated. Detailed microstructural
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| | the evaluations of the mechanical
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| examination showed the presence of higher
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| | properties such as impact and hardness
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| ferrite amounts in the heat affected zone
| |
| | were carried out. And also the pitting
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| (HAZ), while higher amounts of austenite
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| | corrosion resistances were evaluated.
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| were recorded in the centre region of the
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| | Results are discussed in detail.
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| weld metal. Generaly Annealing treatments
| |
| | Â
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| in the temperature range of 800-1000 °C
| |
| | Keywords: DSS, GTAW, weld defect, macro
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| resulted in a precipitation of ? phase
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| | and microstructure, mechanical
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| and chromium carbides at the austenite
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| | properties, pitting corrosion.
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| and ferrite (?/?) interfaces that were
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| |
|
