Evolution of microstructure and hardness of AE42 alloy after heat treatments

Publication: Research - peer-reviewJournal article – Annual report year: 2008

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Evolution of microstructure and hardness of AE42 alloy after heat treatments. / Huang, Y.D.; Dieringa, H.; Hort, N.; Maier, P.; Kainer, K.U.; Liu, Yi-Lin.

In: Journal of Alloys and Compounds, Vol. 463, No. 1-2, 2008, p. 238-245.

Publication: Research - peer-reviewJournal article – Annual report year: 2008

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Huang, Y.D.; Dieringa, H.; Hort, N.; Maier, P.; Kainer, K.U.; Liu, Yi-Lin / Evolution of microstructure and hardness of AE42 alloy after heat treatments.

In: Journal of Alloys and Compounds, Vol. 463, No. 1-2, 2008, p. 238-245.

Publication: Research - peer-reviewJournal article – Annual report year: 2008

Bibtex

@article{1de8045b2e8849748df2176e1a2ac918,
title = "Evolution of microstructure and hardness of AE42 alloy after heat treatments",
keywords = "Brændselsceller og brint",
publisher = "Elsevier BV",
author = "Y.D. Huang and H. Dieringa and N. Hort and P. Maier and K.U. Kainer and Yi-Lin Liu",
year = "2008",
doi = "10.1016/j.jallcom.2007.09.071",
volume = "463",
number = "1-2",
pages = "238--245",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",

}

RIS

TY - JOUR

T1 - Evolution of microstructure and hardness of AE42 alloy after heat treatments

A1 - Huang,Y.D.

A1 - Dieringa,H.

A1 - Hort,N.

A1 - Maier,P.

A1 - Kainer,K.U.

A1 - Liu,Yi-Lin

AU - Huang,Y.D.

AU - Dieringa,H.

AU - Hort,N.

AU - Maier,P.

AU - Kainer,K.U.

AU - Liu,Yi-Lin

PB - Elsevier BV

PY - 2008

Y1 - 2008

N2 - The AE42 magnesium alloy was developed for high pressure die casting (HPDC) from low-aluminum magnesium alloys. In this alloy the rare earth (RE) elements were shown to increase creep resistance by forming AlxREy intermetallics along the grain boundaries. The present work investigates the microstructure of squeeze cast AE42 magnesium alloy and evaluates its hardness before and after heat treatments. The change in hardness is discussed based on the microstructural observations. Some suggestions are given concerning future design of alloy compositions in order to improve high temperature creep properties even further. It is shown that the microstructure of the squeeze-cast AE42 alloy is stable at high temperature 450 degrees C. The subsequent solution and ageing treatments have a limited effect on the hardness. The weak age-hardening is attributed to the precipitation of small amount Of Mg17Al12-phase with the use of about 0.7 wt.% aluminum. The heat treatment to achieve a maximum increase in the hardness is: solution treatment at 450 degrees C for 5-10 h followed by an ageing treatment at 190-220 degrees C for about 5 It. (C) 2007 Elsevier B.V. All rights reserved.

AB - The AE42 magnesium alloy was developed for high pressure die casting (HPDC) from low-aluminum magnesium alloys. In this alloy the rare earth (RE) elements were shown to increase creep resistance by forming AlxREy intermetallics along the grain boundaries. The present work investigates the microstructure of squeeze cast AE42 magnesium alloy and evaluates its hardness before and after heat treatments. The change in hardness is discussed based on the microstructural observations. Some suggestions are given concerning future design of alloy compositions in order to improve high temperature creep properties even further. It is shown that the microstructure of the squeeze-cast AE42 alloy is stable at high temperature 450 degrees C. The subsequent solution and ageing treatments have a limited effect on the hardness. The weak age-hardening is attributed to the precipitation of small amount Of Mg17Al12-phase with the use of about 0.7 wt.% aluminum. The heat treatment to achieve a maximum increase in the hardness is: solution treatment at 450 degrees C for 5-10 h followed by an ageing treatment at 190-220 degrees C for about 5 It. (C) 2007 Elsevier B.V. All rights reserved.

KW - Brændselsceller og brint

U2 - 10.1016/j.jallcom.2007.09.071

DO - 10.1016/j.jallcom.2007.09.071

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

IS - 1-2

VL - 463

SP - 238

EP - 245

ER -