A nickel based superalloy reinforced by both Ni3Al and Ni3V ordered-fcc precipitates
Research output: Contribution to journal › Article › peer-review
Authors
Colleges, School and Institutes
External organisations
- Imperial College London
Abstract
A nickel based superalloy has been designed where the fcc γ Ni matrix is reinforced by two different ordered-fcc intermetallic compounds, γ' L12 Ni3Al and γ00 D022 Ni3V. Primary ageing at 900−1000◦C precipitated spherical L12 Ni3Al, whose volume fraction and size were controlled by altering the ageing temperature and time. Secondary ageing at 700◦C for 1−1000h precipitated D022 Ni3V laths. The duplex precipitation increased hardness by up to 85 HV, with ∼ 500 MPa compressive proof strength maintained at 800◦C. Electron microscopy studied the Ni3Al precipitation and confirmed the form of the secondary Ni3V precipitates and their long term stability.
Details
| Original language | English |
|---|---|
| Pages (from-to) | 472-476 |
| Number of pages | 5 |
| Journal | Scripta Materialia |
| Volume | 162 |
| Early online date | 21 Dec 2018 |
| Publication status | Published - 15 Mar 2019 |
Keywords
- Superalloy, Precipitation, Intermetallics, microstructure, mechanical properties