Abstract
The novel idea for designing quaternary superalloys by two kinds of binary alloys with coherent structure was applied to Ir-Nb-Ni-Al superalloys. Eight alloys were prepared by combining two sorts of binary alloys, Ir-Nb and Ni-Al, in different proportions. The effects of the mole fraction of Ir-based alloy or the L12 alloy on the microstructure and the 0.2% flow stress of quaternary alloys were investigated. Two sorts of coherent structure, fcc/L12-Ir3Nb and fcc/L12-Ni3Al, were observed in the quaternary superalloys. The new developed quaternary Ir-based superalloys are of the advantages of Ir-based alloys and Ni-based superalloys. The 0.2% flow stress of Ir-Nb-Ni-Al at 1200°C could reach up to 350 MPa and the compressive strains were improved greatly compared with Ir-based alloys.
| Original language | English |
|---|---|
| Pages (from-to) | 619-622 |
| Number of pages | 4 |
| Journal | Intermetallics |
| Volume | 8 |
| Issue number | 5-6 |
| DOIs | |
| Publication status | Published - 2000 |
| Event | 5th IUMRS International Conference on Advanced Materials - Symposium D: Intermetallic Compounds and Bulk Metallic Glasses - Beijing, China Duration: 1999 Jun 13 → 1999 Jun 18 |
Keywords
- A. Multiphase intermetallics
- B. Mechanical properties at high temperature
- B. Precipitates
- C. Heat treatment
ASJC Scopus subject areas
- Chemistry(all)
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry