Influence of grain boundary character distribution on sensitization and intergranular corrosion of alloy 600
- Univ. of Toronto, Ontario (Canada). Dept. of Metallurgy and Materials Science
- Ontario Hydro Technologies, Toronto, Ontario (Canada)
- Queen`s Univ., Kingston, Ontario (Canada). Dept. of Materials and Metallurgical Engineering
The objective of this study was to assess, for the first time, the potential impact of ``Grain Boundary Design and Control`` on the bulk sensitization and intergranular corrosion resistance of a commercial corrosion resistant nickel-based austenitic alloy: Alloy 600 (UNS N06600). Increasing the special grain boundary ({Sigma} {le} 29) frequency in thermomechanically processed Alloy 600 from 37% to 71% has been shown to result in commensurate decreases in bulk intergranular corrosion susceptibility in both the solution annealed and sensitized condition; these findings being attributed to both the intrinsic corrosion resistance, and resistance to solute segregation and precipitation exhibited by structurally-ordered low {Sigma} grain boundaries. These results provide considerable promise for the practical application of grain boundary design and control considerations in the general field of corrosion prevention and control.
- OSTI ID:
- 116065
- Journal Information:
- Scripta Metallurgica et Materialia, Vol. 33, Issue 9; Other Information: PBD: 1 Nov 1995
- Country of Publication:
- United States
- Language:
- English
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