Szczegóły publikacji
Opis bibliograficzny
Impact of chemical composition changes during ultrasound atomization and laser powder bed fusion of low alloy steel / Piotr LEDWIG, Hubert PASIOWIEC, Bartłomiej Truczka, Jan FALKUS // Steel Research International ; ISSN 1611-3683. — Tytuł poprz.: Steel Research. — 2025 — vol. 96 iss. 5 art. no. 2400257, s. 1–14. — Bibliogr. s. 13–14, Abstr. — Publikacja dostępna online od: 2024-08-31
Autorzy (4)
Dane bibliometryczne
| ID BaDAP | 159788 |
|---|---|
| Data dodania do BaDAP | 2025-05-09 |
| Tekst źródłowy | URL |
| DOI | 10.1002/srin.202400257 |
| Rok publikacji | 2025 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Steel Research International |
Abstract
This study investigates the effect of changing the chemical composition during ultrasonic atomization (UA) and laser powder bed fusion (LPBF) of low-alloy steel. UA is used to produce a spherical powder with d50 equal to 49 μm. During UA, the chemical composition of the material changes, which is associated with selective evaporation of Mn from 1.42% to 0.35% and B from 0.0012% to <0.0001%. Thermodynamic calculations confirm that during atomization, mostly Mn and Fe evaporate. To achieve a high density of 3D printed parts, in situ remelting in LPBF is applied. A microstructure consisting of fine grains of tempered martensite and bainite in crystallized meltpools is observed. The selected high-quality LPBF samples are austenitized in the temperature range of 900–1200 °C for 20 min and quenched in oil. The samples are characterized by light and scanning electron microscopy, as well as Vickers hardness. Changes in chemical composition result in a decrease in the hardenability of the material, and quenching only at 1200 °C produces a martensitic microstructure. LPBF samples show a hardness higher than that of the postheat-treated sample, but still significantly lower than that of the as-delivery condition, which is related to the change in chemical composition.
