Observation of Localized Corrosion of Ni-Based Alloys Using Coupled Orientation Imaging Microscopy and Atomic Force Microscopy
We present a method for assessing the relative vulnerabilities of distinct classes of grain boundaries to localized corrosion. Orientation imaging microscopy provides a spatial map which identifies and classifies grain boundaries at a metal surface. Once the microstructure of a region of a sample surface has been characterized, a sample can be exposed to repeated cycles of exposure to a corrosive environment alternating with topographic measurement by an atomic force microscope in the same region in which the microstructure had been mapped. When this procedure is applied to Ni and Ni-based alloys, we observe enhanced attack at random grain boundaries relative to special boundaries and twins in a variety of environments.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP) (US)
- DOE Contract Number:
- W-7405-Eng-48
- OSTI ID:
- 792714
- Report Number(s):
- UCRL-JC-136608; TRN: US200302%%212
- Resource Relation:
- Journal Volume: 586; Conference: Materials Research Society 1999 Fall Conference, Boston, MA (US), 11/19/1999--12/03/1999; Other Information: PBD: 24 Nov 1999
- Country of Publication:
- United States
- Language:
- English
Orientation imaging microscopy: Application to the study of cube recrystallization texture in aluminum
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journal | December 1992 |
Orientation imaging: The emergence of a new microscopy
|
journal | April 1993 |
Orientation imaging microscopy: application to the measurement of grain boundary structure
|
journal | July 1993 |
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