TY - JOUR

T1 - Novel Magnesium Nanocomposite for Wire-Arc Directed Energy Deposition

AU - Dieringa, Hajo

AU - Nienaber, Maria

AU - Giannopoulou, Danai

AU - Isakovic, Jonas

AU - Bohlen, Jan

AU - Kujur, Milli Suchita

AU - Ben Khalifa, Noomane

AU - Klein, Thomas

AU - Gneiger, Stefan

N1 - This article belongs to the Special Issue The Additive Manufacturing of Metallic Alloy Funding Information: The research has been funded by the Federal Ministry for Economic Affairs and Climate Action in Germany as part of the OptUm-MagNa joint project (funding code 03LB2040A) in the TTP Lightweight Construction Funding Program, and by the European Commission within the framework INTERREG V-A Austria–Czech Republic in the project “ReMaP” (Interreg project no. ATCZ229). Publisher Copyright: © 2024 by the authors.

PY - 2024/1/20

Y1 - 2024/1/20

N2 - Magnesium alloys play an essential role in metallic lightweight construction for modern mobility applications due to their low density, excellent specific strength, and very good castability. For some years now, degradable implants have also been made from magnesium alloys, which, thanks to this special functionality, save patients a second surgery for explantation. New additive manufacturing processes, which are divided into powder-based and wire-based processes depending on the feedstock used, can be utilized for these applications. Therefore, magnesium alloys should also be used here, but this is hardly ever implemented, and few literature reports exist on this subject. This is attributable to the high affinity of magnesium to oxygen, which makes the use of powders difficult. Therefore, magnesium wires are likely to be used. In this paper, a magnesium-based nanocomposite wire is made from an AM60 (Mg-6Al-0.4Mn) (reinforced with 1 wt% AlN nanoparticles and containing calcium to reduce flammability), using a high-shear process and then extruded into wires. These wires are then used as feedstock to build up samples by wire-arc directed energy deposition, and their mechanical properties and microstructure are examined. Our results show that although the ductility is reduced by adding calcium and nanoparticles, the yield strength in the welding direction and perpendicular to it is increased to 131 MPa.

AB - Magnesium alloys play an essential role in metallic lightweight construction for modern mobility applications due to their low density, excellent specific strength, and very good castability. For some years now, degradable implants have also been made from magnesium alloys, which, thanks to this special functionality, save patients a second surgery for explantation. New additive manufacturing processes, which are divided into powder-based and wire-based processes depending on the feedstock used, can be utilized for these applications. Therefore, magnesium alloys should also be used here, but this is hardly ever implemented, and few literature reports exist on this subject. This is attributable to the high affinity of magnesium to oxygen, which makes the use of powders difficult. Therefore, magnesium wires are likely to be used. In this paper, a magnesium-based nanocomposite wire is made from an AM60 (Mg-6Al-0.4Mn) (reinforced with 1 wt% AlN nanoparticles and containing calcium to reduce flammability), using a high-shear process and then extruded into wires. These wires are then used as feedstock to build up samples by wire-arc directed energy deposition, and their mechanical properties and microstructure are examined. Our results show that although the ductility is reduced by adding calcium and nanoparticles, the yield strength in the welding direction and perpendicular to it is increased to 131 MPa.

KW - AM60

KW - magnesium alloy

KW - mechanical properties

KW - microstructure

KW - nanocomposite

KW - wire-arc directed energy deposition

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=85183316521&partnerID=8YFLogxK

U2 - 10.3390/ma17020500

DO - 10.3390/ma17020500

M3 - Journal articles

C2 - 38276439

AN - SCOPUS:85183316521

VL - 17

JO - Materials

JF - Materials

SN - 1996-1944

IS - 2

M1 - 500

ER -