| dc.contributor.advisor | Berto, Filippo | |
| dc.contributor.advisor | Razavi, Seyed Mohammed Javad | |
| dc.contributor.author | Flo, Oscar Benjamin | |
| dc.date.accessioned | 2018-09-10T14:01:52Z | |
| dc.date.available | 2018-09-10T14:01:52Z | |
| dc.date.created | 2018-06-11 | |
| dc.date.issued | 2018 | |
| dc.identifier | ntnudaim:18929 | |
| dc.identifier.uri | http://hdl.handle.net/11250/2561835 | |
| dc.description.abstract | Selective Laser Melting (SLM) is an Additive Manufacturing (AM) technique that can produce metallic parts of arbitrary geometry with densities greater than 99.7%. However, complex shapes lead to notches with different radii of curvature that may reduce load bearing capacities. This work is aimed to assess the effect of 650°C heat-treatment on fatigue behaviour of Ti-6Al-4V notched samples produced by SLM. The microstructures was investigated through optical microscope(OM) on polished and etched surfaces. After conducting fatigue tests, the fracture surfaces of the failed samples were analyzed using Scanning Electron Microscopy(SEM) in order to identify crack initiation points and fracture mechanisms. The heat-treatment induced some microstructural changes and increased the fatigue performance. Process-induced defects were not affected by the heat-treatment. Due to surface-treatment the process-induced defects became the leading failure mechanism during cyclic loading.
Keywords: Additive Manufacturing, Selective Laser Melting, Heat-treatment,Fatigue, Notch, Titanium Alloy | |
| dc.language | eng | |
| dc.publisher | NTNU | |
| dc.subject | Produktutvikling og produksjon, Produktutvikling og materialer | |
| dc.title | The Effect of Heat-Treatment on Notched Ti-6Al-4V Specimens Produced by Selective Laser Melting Under Fatigue Loading | |
| dc.type | Master thesis | |
