Abstract
The fcc/Ll2 coherent structure formed in the quaternary Ir-Nb-Ni-Al alloys. The ductility of quaternary Ir-Nb alloy was drastically improved by mixing with Ni-Al binary alloy. The two investigated alloys exhibited higher high-temperature 0.2% flow stress (e.g. above 1000 MPa at 1200 °C) and better ductility (≈ 20% both at room temperature and 1200 °C). An excellent balance of high-temperature strength and ductility was obtained. The improvement of ductility was attributed to change the fracture mode from intergranular to transgranular.
Original language | English |
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Pages (from-to) | 481-485 |
Number of pages | 5 |
Journal | Materials Science and Engineering A |
Volume | 329-331 |
DOIs | |
Publication status | Published - 2002 Jun |
Externally published | Yes |
Keywords
- Ductility
- High-temperature strength
- Microstructure
- Quaternary Ir-base alloys
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering