Abstract
The evolution of morphological characteristics associated with creep induced cavities in a cast polycrystalline superalloy under various hot isostatic pressing conditions was investigated. Concentrically oriented N type γ′ rafting structures near the sintering cavities were formed during sintering. The stress gradient causing a chemical potential gradient around the cavity plays a dominant role in solute diffusion, resulting in the nucleation and continuous growth of the solid solution on the cavity surface to achieve healing.
| Original language | English |
|---|---|
| Pages (from-to) | 1018-1021 |
| Number of pages | 4 |
| Journal | Materials Science and Technology (United Kingdom) |
| Volume | 28 |
| Issue number | 8 |
| DOIs | |
| State | Published - 2012 |
Keywords
- Creep
- HIP
- Sintering
- Superalloy
- γ′ raft
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