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