Local composition and nanoindentation response of δ-phase and adjacent γ′′-free zone in a Ni-based superalloy
| Autor: | Vitor Vieira Rielli, Felix Theska, Yin Yao, James P. Best, Sophie Primig |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Materials Research Letters, Vol 10, Iss 5, Pp 301-309 (2022) |
| Druh dokumentu: | article |
| ISSN: | 21663831 2166-3831 |
| DOI: | 10.1080/21663831.2022.2047817 |
| Popis: | Experimental differentiation of individual strengthening effects from the nanoscale precipitates in Alloy 718 remains challenging due to co-precipitation of γ′ and γ′′. Here, we examine a region adjacent to the δ-phase consisting of γ-matrix containing γ′-precipitates only. The width and compositional profile of this γ′′-free zone is uncovered via high-resolution characterization. Nanomechanical analyses reveal that the lack of γ′′-precipitates lower the hardness of the γ′′-free zone by 10–20%, while the δ-phase is found to be ∼80% harder than the γ-matrix. These findings may guide mechanical modelling and microstructural engineering of stronger superalloys critical to aerospace industry. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|