Additive manufacturing of magnesium alloy using uniform droplet spraying: modeling of microstructure evolution
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
Standard
in: MRS Advances, Jahrgang 6, Nr. 15, 06.2021, S. 391-403.
Publikationen: Beitrag in Fachzeitschrift › Artikel › Forschung › (peer-reviewed)
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS (suitable for import to EndNote) - Download
TY - JOUR
T1 - Additive manufacturing of magnesium alloy using uniform droplet spraying: modeling of microstructure evolution
AU - Jaffar, Syed Murtaza
AU - Kostoglou, Nikolaos
AU - Fukuda, Hiroki
AU - Rebholz, Claus
AU - Ando, Teiichi
AU - Liao, Yiliang
AU - Doumanidis, Charalabos C.
N1 - Publisher Copyright: © 2021, The Author(s), under exclusive licence to The Materials Research Society.
PY - 2021/6
Y1 - 2021/6
N2 - Abstract: In this study a material model is developed to predict the solidification microstructure of an additive-manufactured, fully dense magnesium (Mg) alloy using uniform droplet spraying (UDS). Specifically, the crystallite size distribution is simulated by a solidification model, consisting of a nucleation/fragmentation and a constrained growth description, calibrated via microstructural data from a single droplet splat. This is enabled by a semi-analytical thermal modeling framework, based on the superposition of moving Green’s and Rosenthal functions for the temperature field generated by a Gaussian source distribution. The model is implemented for layered ellipsoidal deposit sections on planar substrates by multi-pass spraying, and its predictions are validated against measured crystal sizes by image analysis of experimental micrographs of a Mg 97ZnY 2 alloy, to an error margin of ± 15%. The computationally efficient simulation provides insights to the deposit microstructure, and is intended as a process observer in a closed-loop, adaptive control scheme based on infrared temperature measurements. Graphic abstract: [Figure not available: see fulltext.]
AB - Abstract: In this study a material model is developed to predict the solidification microstructure of an additive-manufactured, fully dense magnesium (Mg) alloy using uniform droplet spraying (UDS). Specifically, the crystallite size distribution is simulated by a solidification model, consisting of a nucleation/fragmentation and a constrained growth description, calibrated via microstructural data from a single droplet splat. This is enabled by a semi-analytical thermal modeling framework, based on the superposition of moving Green’s and Rosenthal functions for the temperature field generated by a Gaussian source distribution. The model is implemented for layered ellipsoidal deposit sections on planar substrates by multi-pass spraying, and its predictions are validated against measured crystal sizes by image analysis of experimental micrographs of a Mg 97ZnY 2 alloy, to an error margin of ± 15%. The computationally efficient simulation provides insights to the deposit microstructure, and is intended as a process observer in a closed-loop, adaptive control scheme based on infrared temperature measurements. Graphic abstract: [Figure not available: see fulltext.]
KW - Additive manufacturing
KW - Mg
KW - Microstructure
KW - Modeling
KW - Spray deposition
UR - http://www.scopus.com/inward/record.url?scp=85101751496&partnerID=8YFLogxK
U2 - 10.1557/s43580-021-00028-x
DO - 10.1557/s43580-021-00028-x
M3 - Article
VL - 6
SP - 391
EP - 403
JO - MRS Advances
JF - MRS Advances
SN - 2059-8521
IS - 15
ER -