| Autor: |
Varmus, Tibor, Konecna, Radomila, Nicoletto, Gianni |
| Zdroj: |
Transportation Research Procedia; January 2023, Vol. 74 Issue: 1 p756-762, 7p |
| Abstrakt: |
Numerous studies on Laser Powder Bed Fusion (L-PBF) have demonstrated the necessity to refine microstructure of additive manufactured (AM) parts to eliminate hot cracking and anisotropy to improve L-PBF processability. It has been shown that ceramic nanoparticles based on Ti can be extremely effective inoculant resulting in fine grains structure for high strength aluminum alloys without hot cracking. The company ELEMENTUM 3D has patented production process of reactive additive manufacturing (RAM) with a low content of ceramic nanoparticles as Al2024-RAM2. This contribution presents results of an experimental determination of high cycle fatigue life of L-PBF Al2024-RAM2 alloy with as-built (i.e., rough) and polished surface. Experiments were done on miniature specimens printed on a SLM 280 HL system with a layer thickness of 60 µm. The specimens were tested in cyclic plane bending at a load ratio of R = 0 at a frequency of 25 Hz. Moreover, the microstructure was investigated by means of scanning and transmission electron microscopy. |
| Databáze: |
Supplemental Index |
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