Abstract
The NiCoCrAl alloy sheet was fabricated by electron beam physical vapor deposition technique and the effects of the heat treatment on the microstructure and tensile strength of the NiCoCrAl alloy sheet were investigated. The heat treatment at 1050 °C is favorable to improve the interface bonding between the columnar structures due to the disappearance of the intergranular gaps. Comparing with the thin NiCoCrAl alloy sheet before heat treatment, the Ni 3Al phase appears in the NiCoCrAl alloy sheet after heat treatment, which is favorable to improve the interface bonding between the columnar structures. The increase in the tensile strength and elongation is attributed to the improvement of the interface bonding between the columnar structures. The residual stress in the NiCoCrAl alloy sheet after heat treatment is reduced significantly, which also confirms that the interface bonding is improved by the heat treatment.
| Original language | English |
|---|---|
| Pages (from-to) | 2395-2401 |
| Number of pages | 7 |
| Journal | Transactions of Nonferrous Metals Society of China (English Edition) |
| Volume | 22 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 2012 |
| Externally published | Yes |
Keywords
- heat treatment
- mechanical properties
- microstructure
- nickel-base alloys
- physical vapor deposition