Influence of Surface Preparation and Heat Treatment on Mechanical Behavior of Hybrid Aluminum Parts Manufactured by a Combination of Laser Powder Bed Fusion and Conventional Manufacturing Processes
| Autor: | Alessio Tommasi, Flavia Gili, David Jerónimo Busquets Mataix, Andrea Bertinetti, Julien Bajolet, Pavel Penchev, Nathalie Maillol, Daniele Pullini |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
lcsh:TN1-997
0209 industrial biotechnology Materials science heat treatments Automotive industry 02 engineering and technology Welding Substrate (printing) casting/forging processes 7. Clean energy Forging law.invention 020901 industrial engineering & automation law General Materials Science Process engineering lightweight Throughput (business) laser powder bed fusion (LPBF) lcsh:Mining engineering. Metallurgy direct metal laser sintering (DMLS) business.industry Metals and Alloys Process (computing) hybrid manufacturing 021001 nanoscience & nanotechnology Direct metal laser sintering Casting (metalworking) surface preparation 0210 nano-technology business additive manufacturing |
| Zdroj: | Metals, Vol 11, Iss 522, p 522 (2021) Metals Volume 11 Issue 3 |
| ISSN: | 2075-4701 |
| Popis: | Today, in industry, laser-based additive manufacturing (LAM) is used to produce high-value parts of very complex designs that are not manufacturable by conventional technologies this process’ low production throughput and high cost prevent it from being used more extensively. One way to exploit the benefits of LAM in industry is to have it combined with lower-cost manufacturing technologies. In a hybrid approach, LAM can be integrated within an assembly line’s welding station to complete the manufacturing of a product by depositing a foreign material on a substrate only where needed, or by building structures of complex 3D geometries (e.g., lattice structures) directly onto inexpensive preforms. To pave the way for using a hybrid approach design in real applications, as a prime requirement, the chosen technology must grant comparable structural integrity to its products with respect to its conventional counterparts. In this work, different types of surface pretreatments for substrates were investigated as a key enabling factor to tailor the bi-material system’s mechanical properties in use. Hybrid samples were made by depositing AlSi10Mg by direct metal laser sintering onto A356-T6 aluminum bases prefabricated by casting and forging, and their properties were compared with fully homogeneous samples that were conventionally produced. Specifically referring to the automotive use case, both these alloy grades were chosen for their extensive use in the production of motor vehicles. The testing campaign, characterized by microscopy, mechanical testing, and fatigue, revealed that the structural integrity of the hybrid samples is comparable with the benchmarks when standard heat treatments are adopted. This result makes the prospect of the exploitation of the hybridization concept as conceived very promising for the future. |
| Databáze: | OpenAIRE |
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