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

A.S. Vishwanath; K. Rane; J. Schaper; M. Strano; R. Casati

doi:10.1080/00325899.2021.1911457

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

A.S. Vishwanath, K. Rane, J. Schaper, M. Strano, R. Casati^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

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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.

Original language	English
Pages (from-to)	370-377
Number of pages	8
Journal	Powder Metallurgy
Volume	64
Issue number	5
Early online date	11 Apr 2021
DOIs	https://doi.org/10.1080/00325899.2021.1911457
Publication status	E-pub ahead of print - 11 Apr 2021

Keywords

additive manufacturing
AZ91
DSC
electron microscopy
magnesium
microstructure

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10.1080/00325899.2021.1911457

Vishwanath-etal-PM-2021-Rapid-production-of-AZ91-Mg-alloy-by-extrusion-based-additive-manufacturing-processAccepted author manuscript, 1.41 MBLicence: CC BY-NC-ND 4.0

https://re.public.polimi.it/handle/11311/1169482Licence: CC BY-NC-ND 4.0

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title = "Rapid production of AZ91 Mg alloy by extrusion based additive manufacturing process",

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.",

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author = "A.S. Vishwanath and K. Rane and J. Schaper and M. Strano and R. Casati",

year = "2021",

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doi = "10.1080/00325899.2021.1911457",

language = "English",

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pages = "370--377",

journal = "Powder Metallurgy",

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T1 - Rapid production of AZ91 Mg alloy by extrusion based additive manufacturing process

AU - Vishwanath, A.S.

AU - Rane, K.

AU - Schaper, J.

AU - Strano, M.

AU - Casati, R.

PY - 2021/4/11

Y1 - 2021/4/11

N2 - 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.

AB - 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.

KW - additive manufacturing

KW - AZ91

KW - DSC

KW - electron microscopy

KW - magnesium

KW - microstructure

U2 - 10.1080/00325899.2021.1911457

DO - 10.1080/00325899.2021.1911457

M3 - Article

AN - SCOPUS:85104357689

SN - 0032-5899

VL - 64

SP - 370

EP - 377

JO - Powder Metallurgy

JF - Powder Metallurgy

IS - 5

ER -

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

Abstract

Keywords

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