Characterisation of nano-sized Al-Mn-(Mg) particles in AZ91 and their effect on Mg17Al12 precipitation

R. Zeng; I. P. Jones; Y. Chiu

doi:10.1016/j.jallcom.2013.04.179

Characterisation of nano-sized Al-Mn-(Mg) particles in AZ91 and their effect on Mg₁₇Al₁₂ precipitation

R. Zeng^*, I. P. Jones, Y. Chiu

^*Corresponding author for this work

Metallurgy and Materials

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

15 Citations (Scopus)

Abstract

Al-Mn-(Mg) particles in the size range of 20-200 nm have been found in a sand cast AZ91 magnesium alloy. Their morphologies, chemical composition and structures were investigated using transmission electron microscopy. It was found that these particles have a chemical composition of (Al _6.52Mn)_1-xMg_x (x <0.13) and a decagonal quasi-crystalline structure. These particles were stable during a solution treatment at 420 °C for 72 h and acted as preferential nucleation sites for Mg₁₇Al₁₂ precipitates during the subsequent ageing. The potential effect of these Al-Mn-(Mg) particles on the strengthening of AZ91 magnesium alloys is discussed.

Original language	English
Pages (from-to)	34-38
Number of pages	5
Journal	Journal of Alloys and Compounds
Volume	579
Early online date	4 May 2013
DOIs	https://doi.org/10.1016/j.jallcom.2013.04.179
Publication status	Published - 5 Dec 2013

Keywords

Metals and alloys
Precipitation
Quasicrystals
Transmission electron microscopy

ASJC Scopus subject areas

Mechanical Engineering
Mechanics of Materials
Materials Chemistry
Metals and Alloys

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10.1016/j.jallcom.2013.04.179Licence: None: All rights reserved

Cite this

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title = "Characterisation of nano-sized Al-Mn-(Mg) particles in AZ91 and their effect on Mg17Al12 precipitation",

abstract = "Al-Mn-(Mg) particles in the size range of 20-200 nm have been found in a sand cast AZ91 magnesium alloy. Their morphologies, chemical composition and structures were investigated using transmission electron microscopy. It was found that these particles have a chemical composition of (Al 6.52Mn)1-xMgx (x <0.13) and a decagonal quasi-crystalline structure. These particles were stable during a solution treatment at 420 °C for 72 h and acted as preferential nucleation sites for Mg17Al12 precipitates during the subsequent ageing. The potential effect of these Al-Mn-(Mg) particles on the strengthening of AZ91 magnesium alloys is discussed.",

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T1 - Characterisation of nano-sized Al-Mn-(Mg) particles in AZ91 and their effect on Mg17Al12 precipitation

AU - Zeng, R.

AU - Jones, I. P.

AU - Chiu, Y.

PY - 2013/12/5

Y1 - 2013/12/5

N2 - Al-Mn-(Mg) particles in the size range of 20-200 nm have been found in a sand cast AZ91 magnesium alloy. Their morphologies, chemical composition and structures were investigated using transmission electron microscopy. It was found that these particles have a chemical composition of (Al 6.52Mn)1-xMgx (x <0.13) and a decagonal quasi-crystalline structure. These particles were stable during a solution treatment at 420 °C for 72 h and acted as preferential nucleation sites for Mg17Al12 precipitates during the subsequent ageing. The potential effect of these Al-Mn-(Mg) particles on the strengthening of AZ91 magnesium alloys is discussed.

AB - Al-Mn-(Mg) particles in the size range of 20-200 nm have been found in a sand cast AZ91 magnesium alloy. Their morphologies, chemical composition and structures were investigated using transmission electron microscopy. It was found that these particles have a chemical composition of (Al 6.52Mn)1-xMgx (x <0.13) and a decagonal quasi-crystalline structure. These particles were stable during a solution treatment at 420 °C for 72 h and acted as preferential nucleation sites for Mg17Al12 precipitates during the subsequent ageing. The potential effect of these Al-Mn-(Mg) particles on the strengthening of AZ91 magnesium alloys is discussed.

KW - Metals and alloys

KW - Precipitation

KW - Quasicrystals

KW - Transmission electron microscopy

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