Abstract
The fatigue behaviour of notched and unnotched specimens produced by additively manufactured Inconel 718 were analysed in the as-built and heat-treated conditions. The surfaces display high roughness and defects acting as fatigue initiation sites. In the as-built condition, fine subgrains were found, while in in the heat-treated state, the subgrains were removed and the dislocation density recovered. SN-curves are predicted based on tensile properties, hardness and defects obtained by fractography, using the (Formula presented.) -method.
| Original language | English |
|---|---|
| Pages (from-to) | 2326-2336 |
| Number of pages | 11 |
| Journal | Fatigue and Fracture of Engineering Materials and Structures |
| Volume | 43 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 1 Oct 2020 |
| Externally published | Yes |
Keywords
- Inconel 718
- additive materials
- fatigue
- heat treatment
- selective laser melting
- small defects
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