| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1469511 | Corrosion Science | 2012 | 9 Pages |
The effect of laser-beam welding and subsequent short-time post-weld heat treatment at different temperatures and holding time on microstructure evolution and pitting corrosion behavior of UNS S31803 duplex stainless steel was investigated. The results showed the as-welded joint displayed impaired pitting corrosion resistance and that pitting preferentially occurred at ferrite grain in the fusion zone. Short-time heat treatment enhanced the pitting corrosion resistance of welded joint. Optimal post-weld heat treatment of 3 min heat treatment at 1080 °C was identified at which the joint restored the pitting corrosion resistance lost during welding process.
► Pitting corrosion is investigated before and after post-weld heat treatment. ► The Cr2N precipitation is studied by SEM, TEM and AFM. ► The best short-time post-weld heat treatment condition is determined. ► The cause of pitting corrosion resistance variation is discussed in detail.
