Rapid production of AZ91 Mg alloy by extrusion based additive manufacturing process

Vishwanath, A.S. and Rane, K. and Schaper, J. and Strano, M. and Casati, R. (2021) Rapid production of AZ91 Mg alloy by extrusion based additive manufacturing process. Powder Metallurgy, 64 (5). pp. 370-377. ISSN 1743-2901 (https://doi.org/10.1080/00325899.2021.1911457)

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Abstract

AZ91 magnesium alloy parts were successfully produced using a novel extrusion-based additive manufacturing process. The green parts were built in two different orientations and subjected to debinding and sintering treatments. The as-built alloy showed a heterogeneous microstructure made up of α–Mg matrix, Al8Mn5 second phase particles, MgO layers and Mg17Al12continuous precipitates. After solution treatment followed by aging, Mg17Al12 discontinuous precipitates were observed. The sintered samples showed a yield strength and ultimate tensile strength of 79 and 207 MPa, respectively, in the horizontal configuration. Analysis of the fracture surfaces revealed that a continuous network of magnesium oxide layer around the powder particles act as preferential path for crack propagation.

ORCID iDs

Vishwanath, A.S., Rane, K. ORCID logoORCID: https://orcid.org/0000-0002-9405-7950, Schaper, J., Strano, M. and Casati, R.;
CORE (COnnecting REpositories)