| Title |
The Characteristics of SCC Crack Propagation in 22Cr - 5.5 Ni - 3 Mo Duplex Stainless Steel Weldment |
| Authors |
김충언(Choong Un Kim); 강춘식(Choon Sik Kang) |
| Abstract |
The characteristics of SCC crack propagation in duplex stainless steel weldment made by SMAW GTAW and GMAW processes were investigated in 42% MgCl₂,142℃ boiling solution. From these experiments, it could be concluded that the strycture anisotrpy of y phase as well as the phase ratio played an important role in SCC resistance. GTA and GMA weld metal showed higher SCC resistance than base meta1 because of randomly distributed γ phase. The crack in weld metal had same opportunity of receiving keying effect as that in base metal, but it had less possibility of intersecting γ phase. The SCC resistance of the SMA weld metal and the HAZ was lower than that of the base metal because their phase ratio deviated from the proper phase ratio. |