Microstructure evolution and pitting corrosion behavior in repeated TIG welding cycles of UNS32760 super duplex stainless steel were studied. The microstructural evolution was observed through optical electron microscope. Meanwhile, pitting corrosion was investigated by means of potentiodynamic polarization and gravimetric test. The specimens were evaluated to simulate repeated welding cycles of original weld, Repair-1 (R1), Repair-2 (R2) and Repair-3 (R3) respectively. The result show that the chromium nitride precipitates starts appear in heat-affected zone R-2 welding cycles which followed by the growth of metastable pits.
|Journal||IOP Conference Series: Materials Science and Engineering|
|Publication status||Published - 26 Feb 2019|
|Event||2nd Mineral Processing and Technology International Conference, MineProceT 2018 - Tangerang, Banten Province, Indonesia|
Duration: 1 Nov 2018 → 1 Nov 2018