Unexpected Expansion Behavior of Mg-Al Alloys During Isothermal Ageing

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Unexpected Expansion Behavior of Mg-Al Alloys During Isothermal Ageing. / Zhang, Xiao; Huang, Yuanding; Li, Xiaohu et al.
in: JOM: Journal of The Minerals, Metals & Materials Society, Jahrgang 71, Nr. 8, 15.08.2019, S. 2906-2912.

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

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Zhang X, Huang Y, Li X, Gan W, Kainer KU, Hort N. Unexpected Expansion Behavior of Mg-Al Alloys During Isothermal Ageing. JOM: Journal of The Minerals, Metals & Materials Society. 2019 Aug 15;71(8):2906-2912. doi: 10.1007/s11837-019-03516-6

Bibtex

@article{c4832fa32c9641af8c2c585de1e83e75,
title = "Unexpected Expansion Behavior of Mg-Al Alloys During Isothermal Ageing",
abstract = "The precipitation behavior of Mg-Al alloys during isothermal ageing has been investigated by dilatometry. Only continuous precipitation was observed in Mg-5.5Al during ageing at 175°C, 200°C, or 225°C, while both discontinuous and continuous precipitation occurred in Mg-8.9Al at the same ageing temperatures. Dilatometry curves showed that Mg-8.9Al expanded when aged at 225°C or 250°C. These results demonstrate that high content of Al is beneficial for discontinuous precipitation in binary Mg-Al alloys. Additional analyses indicated that the expansion of Mg-8.9Al during isothermal ageing can be attributed to the increment of the Mg cell lattice parameters. Moreover, continuous precipitation could suppress the discontinuous precipitation by reducing the driving force for growth of discontinuous precipitates.",
keywords = "Engineering",
author = "Xiao Zhang and Yuanding Huang and Xiaohu Li and Weimin Gan and Kainer, {Karl Ulrich} and Norbert Hort",
year = "2019",
month = aug,
day = "15",
doi = "10.1007/s11837-019-03516-6",
language = "English",
volume = "71",
pages = "2906--2912",
journal = "JOM: Journal of The Minerals, Metals & Materials Society",
issn = "1047-4838",
publisher = "The Minerals, Metals & Materials Society",
number = "8",

}

RIS

TY - JOUR

T1 - Unexpected Expansion Behavior of Mg-Al Alloys During Isothermal Ageing

AU - Zhang, Xiao

AU - Huang, Yuanding

AU - Li, Xiaohu

AU - Gan, Weimin

AU - Kainer, Karl Ulrich

AU - Hort, Norbert

PY - 2019/8/15

Y1 - 2019/8/15

N2 - The precipitation behavior of Mg-Al alloys during isothermal ageing has been investigated by dilatometry. Only continuous precipitation was observed in Mg-5.5Al during ageing at 175°C, 200°C, or 225°C, while both discontinuous and continuous precipitation occurred in Mg-8.9Al at the same ageing temperatures. Dilatometry curves showed that Mg-8.9Al expanded when aged at 225°C or 250°C. These results demonstrate that high content of Al is beneficial for discontinuous precipitation in binary Mg-Al alloys. Additional analyses indicated that the expansion of Mg-8.9Al during isothermal ageing can be attributed to the increment of the Mg cell lattice parameters. Moreover, continuous precipitation could suppress the discontinuous precipitation by reducing the driving force for growth of discontinuous precipitates.

AB - The precipitation behavior of Mg-Al alloys during isothermal ageing has been investigated by dilatometry. Only continuous precipitation was observed in Mg-5.5Al during ageing at 175°C, 200°C, or 225°C, while both discontinuous and continuous precipitation occurred in Mg-8.9Al at the same ageing temperatures. Dilatometry curves showed that Mg-8.9Al expanded when aged at 225°C or 250°C. These results demonstrate that high content of Al is beneficial for discontinuous precipitation in binary Mg-Al alloys. Additional analyses indicated that the expansion of Mg-8.9Al during isothermal ageing can be attributed to the increment of the Mg cell lattice parameters. Moreover, continuous precipitation could suppress the discontinuous precipitation by reducing the driving force for growth of discontinuous precipitates.

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=85065546596&partnerID=8YFLogxK

U2 - 10.1007/s11837-019-03516-6

DO - 10.1007/s11837-019-03516-6

M3 - Journal articles

AN - SCOPUS:85065546596

VL - 71

SP - 2906

EP - 2912

JO - JOM: Journal of The Minerals, Metals & Materials Society

JF - JOM: Journal of The Minerals, Metals & Materials Society

SN - 1047-4838

IS - 8

ER -

DOI