The detrimental effect of elemental contaminants when using B additions to improve the creep properties of a Ni-based superalloy
The effect of Si contamination when using B to improve the creep properties of a Ni-based superalloy was investigated using advanced characterization techniques and first-principles simulations on alloys with high and low B levels with varying Si contents. The positive effect of B segregation along...
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| Veröffentlicht in: | Scripta materialia 2021-08, Vol.201 (C), p.113971, Article 113971 |
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| container_title | Scripta materialia |
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| creator | Detrois, Martin Pei, Zongrui Liu, Tao Poplawsky, Jonathan D. Gao, Michael C. Jablonski, Paul D. Hawk, Jeffrey A. |
| description | The effect of Si contamination when using B to improve the creep properties of a Ni-based superalloy was investigated using advanced characterization techniques and first-principles simulations on alloys with high and low B levels with varying Si contents. The positive effect of B segregation along grain boundaries on the creep properties was mitigated by the presence of Si which showed a similar segregation preference. Density functional theory calculations were used for validation by calculating grain boundary cleavage energies. Silicon was shown to decrease grain boundary cohesion which offsets the positive effect of B.
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| doi_str_mv | 10.1016/j.scriptamat.2021.113971 |
| format | Article |
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| ispartof | Scripta materialia, 2021-08, Vol.201 (C), p.113971, Article 113971 |
| issn | 1359-6462 1872-8456 |
| language | eng |
| recordid | cdi_osti_scitechconnect_1782338 |
| source | Elsevier ScienceDirect Journals |
| subjects | Atom-probe tomography Boron Creep Interfaces Superalloy |
| title | The detrimental effect of elemental contaminants when using B additions to improve the creep properties of a Ni-based superalloy |
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