Microstructure, Mechanical and Corrosion Properties of Mg-Gd-Zn Alloys

Amirthalingam Srinivasan; Yuan Ding Huang; Chamini Lakshi Mendis; Hajo Dieringa; Carsten Blawert; Karl Ulrich  Kainer; Norbert Hort

doi:10.4028/www.scientific.net/MSF.765.28

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HomeMaterials Science ForumMaterials Science Forum Vol. 765Microstructure, Mechanical and Corrosion...

Microstructure, Mechanical and Corrosion Properties of Mg-Gd-Zn Alloys

Abstract:

Microstructure, mechanical and corrosion properties of Mg-10Gd-2Zn and Mg-10Gd-6Zn (all in wt.%) were evaluated in the as-cast condition. The microstructures of both alloys contained (Mg, Zn)₃Gd phase at the interdendritic regions and long period stacking ordered (LPSO) phase distributed in the matrix. The Mg-10Gd-6Zn alloy consisted of a high volume fraction of (Mg,Zn)₃Gd intermetallic phases continuously distributed along the grain boundaries. The tensile properties, especially the elongation to failure of the Mg-10Gd-6Zn alloy were slightly lower than those of Mg-10Gd-2Zn. An enhancement in creep resistance was observed with Mg-10Gd-2Zn alloy with the post creep tested microstructure showing dynamic precipitation. Corrosion studies indicated that increased Zn content, from 2 to 6 % in Mg-10Gd alloys, significantly reduced the corrosion resistance.

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Periodical:

Materials Science Forum (Volume 765)

Pages:

28-32

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.765.28

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Online since:

July 2013

Authors:

Amirthalingam Srinivasan, Yuan Ding Huang, Chamini Lakshi Mendis, Hajo Dieringa, Carsten Blawert, Karl Ulrich Kainer, Norbert Hort

Keywords:

(Mg,Zn)₃Gd, Corrosion Behaviour, Creep, LPSO, Mg-Gd-Zn Alloys, Tensile Properties

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