Journal article
Damage Susceptibility of Grain Boundaries in HT9 Steel Subjected to High-Temperature Creep
Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.43(10), pp.3539-3546
10/2012
Handle:
https://hdl.handle.net/2376/113319
Abstract
HT9 steel is an attractive ferritic/martensitic steel that is used in components of nuclear and fossil power plants because of its high strength and good swelling resistance. Specific phenomena (such as segregation, voiding, cracking, etc.) are prevalent along grain boundaries since these interfaces act as efficient sources for vacancies. The accumulation of vacancies in grain boundaries may result in intergranular fracture. In this study, HT9 steel was subjected to creep tests at elevated temperature (about 0.5 T
m) and two different creep conditions (where creep lifetimes were about 100 and about 1000 hours, respectively). The grain boundaries in HT9 steel after creep tests were studied by the use of scanning electron microscopy in order to establish the relationship between the grain boundary structure and creep damage. Images and data obtained using electron backscatter diffraction reveal a high susceptibility of high-angle boundaries to creep cavitation, as expected. In addition, the Σ3 boundaries are also susceptible to damage under these conditions at a similar or even higher rate as compared with random high-angle boundaries.
Metrics
10 Record Views
Details
- Title
- Damage Susceptibility of Grain Boundaries in HT9 Steel Subjected to High-Temperature Creep
- Creators
- Zhe Leng - School of Mechanical and Materials Engineering Washington State University Pullman WA 99164-2920 USADavid Field - School of Mechanical and Materials Engineering Washington State University Pullman WA 99164-2920 USA
- Publication Details
- Metallurgical and materials transactions. A, Physical metallurgy and materials science, Vol.43(10), pp.3539-3546
- Academic Unit
- Mechanical and Materials Engineering, School of
- Publisher
- Springer US; Boston
- Identifiers
- 99900547652901842
- Language
- English
- Resource Type
- Journal article