| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1469361 | Corrosion Science | 2013 | 9 Pages |
Effects of chemical composition on grain boundary microchemistry and stress corrosion cracking (SCC) in two kinds of modified Alloy 182 with different hot-cracking resistance were investigated. The results showed that while decreasing concentrations of C, P and S but increasing the concentration ratio of (Nb + Ta)/Si can enhance hot-cracking resistance of the alloy, SCC susceptibility in primary water was promoted simultaneously, which is most likely due to the lowered creep resistance by a lower precipitate density and less P segregation at the grain boundary in the alloy.
► Composition effect on grain boundary chemistry and SCC in two Alloys 182 was studied. ► Alloy 182–1 has higher concentrations of C, P, S and a lower ratio of (Nb + Ta)/Si. ► Segregation of P and Si and more precipitates at the grain boundary in Alloy 182–1. ► Alloy 182–1 showed a higher resistance to SCC in primary water than Alloy 182–2. ► P segregation and more tortuous grain boundaries caused higher SCC resistance.
