Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Evidence that carbide precipitation produces hydrogen traps in Ni-17Cr-8Fe alloys
Ist Teil von
Scripta materialia, 1997-03, Vol.36 (6), p.713-719
Ort / Verlag
New York, NY: Elsevier Ltd
Erscheinungsjahr
1997
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
•
1. Carbide precipitation produces grain boundary hydrogen trap sites in both wrought and welded Ni-17Cr-8Fe alloys.
•
2. Mill annealing (<lOOO °C) produces strong trap sites (~55 KJ/mol binding energy) capable of retaining relatively large amounts (~1.8 ppm) of hydrogen while sensitization (6OO °C/24hrs) produces weaker traps (19–28 KJ/mol binding energy) which dissolve less hydrogen (~1 ppm) relative to the mill annealed material. The difference in the trap sites may be related to the predominant type of carbide (M
7C
3 in mill annealed vs. M
23C
6 in sensitized).
•
3. Correlation of grain boundary trapping with SCC behavior in high temperature deaerated water suggests that the strong grain boundary hydrogen traps present in the mill annealed material are beneficial to the intergranular SCC of Ni-Cr-Fe alloys.