Effect of repeated TIG welding cycles on microstructure evolution and pitting corrosion behavior of UNS 32760 super duplex stainless steel

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Abstract

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.

Original languageEnglish
Article number012032
JournalIOP Conference Series: Materials Science and Engineering
Volume478
Issue number1
DOIs
Publication statusPublished - 26 Feb 2019
Event2nd Mineral Processing and Technology International Conference, MineProceT 2018 - Tangerang, Banten Province, Indonesia
Duration: 1 Nov 20181 Nov 2018

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