Influence of the finish cutting operations on the fatigue performance of Ti-6Al-4V parts produced by Selective Laser Melting
| Autor: | E. Picot, Joël Rech, C. Grosjean, Fabien Lefebvre, M. Dumas, R. Kaminski, Frédéric Cabanettes, Frédéric Valiorgue |
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| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
Materials science Mechanical engineering chemistry.chemical_element Polishing 02 engineering and technology Surface finish 021001 nanoscience & nanotechnology 020901 industrial engineering & automation chemistry Machining Residual stress Surface roughness General Earth and Planetary Sciences Selective laser melting 0210 nano-technology General Environmental Science Surface integrity Titanium |
| Zdroj: | Procedia CIRP. 71:429-434 |
| ISSN: | 2212-8271 |
| Popis: | The production of parts by additive manufacturing technologies is a hot topic for industry. The Selective Laser Melting process is among the most widely used nowadays. Unfortunately the geometrical accuracy, as well as the surface roughness are very poor. Functional surfaces therefore require further machining operations in order to fulfill the specifications of the designer. However the influence of finishing operations on the surface integrity of such parts needs to be further investigated. This paper aims at analyzing the influence of milling or polishing operations on the rotary bending fatigue resistance of titanium samples generated by SLM. It is highlighted that finishing operations are able to improve significantly the fatigue resistance compared to the initial state after SLM + heat treatment. The fatigue results are also discussed in light of the surface integrity (roughness parameters and residual stresses). It is found that the surface topography skewness is an interesting parameter which correlates with the fatigue performance. None of these finishing techniques are able to lead to a fatigue resistance comparable to the one obtained with a wrought titanium part. |
| Databáze: | OpenAIRE |
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