Designing an Fe-Ni-Ti maraging steel tailor-made for laser additive manufacturing
| Autor: | Kürnsteiner, Philipp, Barriobero-Vila, Pere, Bajaj, Priyanshu, De Geuser, Frédéric, Wilms, Markus B., Jägle, Eric A., Raabe, Dierk |
|---|---|
| Přispěvatelé: | Universitat Politècnica de Catalunya. Departament de Ciència i Enginyeria de Materials, Universitat Politècnica de Catalunya. CIEFMA-PROCOMAME - Disseny Microestructural i Fabricació Avançada de Materials |
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: |
History
Refractory materials Materials refractaris Polymers and Plastics Additive manufacturing Fabricació additiva Maraging steel Enginyeria dels materials [Àrees temàtiques de la UPC] Alloy design Industrial and Manufacturing Engineering Directed energy deposition (DED) High-energy X-ray diffraction (HEXRD) Business and International Management Atom probe tomography (APT) |
| Zdroj: | Additive manufacturing 73, 103647 (2023). doi:10.1016/j.addma.2023.103647 |
| DOI: | 10.3204/pubdb-2023-03911 |
| Popis: | Additive manufacturing 73, 103647 (2023). doi:10.1016/j.addma.2023.103647 Laser additive manufacturing (LAM) offers high flexibility in the production of customized and geometrically complex parts. The technique receives great interest from industry and academia but faces substantial challenges regarding processability and insufficient mechanical properties of LAM-produced material. One reason is that currently mainly conventional alloys are being used in LAM, which were developed for different processes such as casting. Since these alloys are not optimized for the specific process conditions encountered in LAM such as fast cooling and cyclic re-heating, they cannot be expected to perform ideally in such processes regarding processability and resulting mechanical properties. Here we present the development of a new, simple ternary Fe-Ni-Ti maraging-type alloy tailor-made for LAM. We used compositionally graded samples to screen Ti compositions from 0 to 21 at. % and efficiently identify promising microstructures and mechanical properties. Under LAM solidification conditions the desired mainly martensitic microstructure needed for a maraging steel formed at Ti compositions ranging from 0 to 7 at. %. Within this composition range, the intended microstructure is formed and additionally some unique process conditions of LAM such as cyclic re-heating can be exploited. Specifically, in-situ phase transformations can be controlled during LAM, via the thermal history. At higher Ti compositions two different eutectic microstructures with different primary phases were found that show a high hardness of up to 700 HV. Published by Elsevier, Amsterdam [u.a.] |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|