| DOI | Resolve DOI: https://doi.org/10.1080/0950083031000064399 |
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| Author | Search for: Chen, Kuiying1; Search for: Zhao, L. R.1; Search for: Tse, John S.2 |
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| Affiliation | - National Research Council Canada. NRC Institute for Aerospace Research
- National Research Council Canada. NRC Steacie Institute for Molecular Sciences
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| Format | Text, Article |
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| Abstract | Fully first-principles calculations have been performed to investigate the alloying effect on the sulphur embrittlement of the ?- ?' interface of nickel-based single-crystal superalloys. The shear and cohesive strengths of the inter-face are calculated in terms of Mayer bond orders (BOs), and the ratio R BO of shear strength over cohesive strength is analysed as a function of alloying element substitution. The interface characteristics are also studied using the electron charge-density distribution. It is found that the interplay between shear and cohesive strengths has a significant influence on the interfacial embrittlement. Using the phenomenological theory of fracture as well as the calculated ratio R BO , we propose a new mechanism responsible for relieving sulphur embrittlement of the ?- ?' interface through alloying substitution. |
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| Publication date | 2003 |
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| In | |
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| Language | English |
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| NPARC number | 12327572 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 73361dc3-37cb-48a2-a6ab-7cdd7e6dd462 |
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| Record created | 2009-09-10 |
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| Record modified | 2020-04-02 |
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