Plane-strain fracture toughness of thin additively manufactured maraging steel samples

This study aimed to evaluate the aging effects on mechanical properties of 18Ni (300) maraging steel processed by additive manufacturing powder bed fusion and subjected to different aging conditions. The aging temperatures were 470 °C, 510 °C, and 530 °C, with exposure times ranging from 0.33 to 96 ...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Additive manufacturing 2022-01, Vol.49, p.102509, Article 102509
Hauptverfasser: Santos, Pedro L.L., Avila, Julian A., da Fonseca, Eduardo B., Gabriel, André H.G., Jardini, André L., Lopes, Éder S.N.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:This study aimed to evaluate the aging effects on mechanical properties of 18Ni (300) maraging steel processed by additive manufacturing powder bed fusion and subjected to different aging conditions. The aging temperatures were 470 °C, 510 °C, and 530 °C, with exposure times ranging from 0.33 to 96 h, followed by air cooling. Despite the layer-by-layer material consolidation mechanism, weak preferred orientation was found in the as-built condition; moreover, only martensite and austenite were found in the X-ray diffraction results. This alloy showed a steep increase in hardness, compressive strength, and tensile strength, while the work-hardening ability decreased with aging. Despite using thin single-edge bending samples (5 mm), the plane-strain fracture toughness (KIC) size requirement was met, and valid KIC results were 49 ~ 64 MPam. This result could help design new additive manufacturing applications of high-strength steel, such as thin-walled, lattice structures, and reduced cross-section parts projected to minimize weight in different industries. [Display omitted]
ISSN:2214-8604
2214-7810
DOI:10.1016/j.addma.2021.102509