KIT | KIT-Bibliothek | Impressum | Datenschutz

Effective Platform Heating for Laser Powder Bed Fusion of an Al-Mn-Sc-Based Alloy

Bayoumy, Dina; Boll, Torben ORCID iD icon 1; Karapuzha, Amal Shaji; Wu, Xinhua; Zhu, Yuman; Huang, Aijun
1 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)

Abstract:

Platform heating is one of the effective strategies used in laser powder bed fusion (LPBF) to
avoid cracking during manufacturing, especially when building relatively large-size components,
as it removes significant process-induced residual strains. In this work, we propose a novel and
simple method to spare the elaborate post-processing heat treatment typically needed for LPBF Al-Sc
alloys without compromising the mechanical properties. We systematically investigated the effects
of LPBF platform heating at 200 ◦C on the residual stress relief, microstructure, and mechanical
performance of a high-strength Al-Mn-Sc alloy. The results reveal that LPBF platform heating at
200 ◦C is sufficient to largely relieve the process-induced residual stresses compared to parts built on
an unheated 35 ◦C platform. Meanwhile, the platform heating triggered the dynamic precipitation
of uniformly dispersed (1.5–2 nm) Sc-rich nano-clusters. Their formation in a high number density
(1.75 × 1024 m−3) resulted in a ~20% improvement in tensile yield strength (522 MPa) compared to
the build on the unheated platform, without sacrificing the ductility (up to 18%). ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000167529
Veröffentlicht am 23.01.2024
Originalveröffentlichung
DOI: 10.3390/ma16247586
Scopus
Zitationen: 3
Web of Science
Zitationen: 3
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Karlsruhe Nano Micro Facility (KNMF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1996-1944
KITopen-ID: 1000167529
HGF-Programm 38.04.01 (POF IV, LK 01) Gas turbines
Weitere HGF-Programme 43.35.03 (POF IV, LK 01) Structural and Functional Behavior of Solid State Systems
Erschienen in Materials
Verlag MDPI
Band 16
Heft 24
Seiten Art.-Nr.: 7586
Vorab online veröffentlicht am 10.12.2023
Schlagwörter KNMFi proposalID 2020-023-028430 APT FIB
Nachgewiesen in Scopus
Web of Science
Dimensions
Globale Ziele für nachhaltige Entwicklung Ziel 9 – Industrie, Innovation und Infrastruktur
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page