Influence of Dendritic and Equiaxed Microstructure of Tensile Properties Variation in AZ91D

Anders E. W. Jarfors; Yang Xanjie; Hanyi Xia; Anshan Yu; Nils-Eric Andersson

Working Paper Communication Version 1 This version is not peer-reviewed

Version 1 : Received: 22 October 2020 / Approved: 23 October 2020 / Online: 23 October 2020 (09:28:12 CEST)
Version 2 : Received: 17 November 2023 / Approved: 20 November 2023 / Online: 20 November 2023 (11:11:43 CET)

There has been controversy around the mechanical properties of Mg-alloys such as AZ91D and the large variation of these have been seen. The current paper addresses this controversy through specially fabricated samples combined with tensile testing and advanced metallography, including 3D reconstruction of the phases. The results show that despite a more brittle nature of the fracture, the equiaxed microstructure displays a better elongation as compared to a dendritic microstructure. The main conclusion is that this is primarily caused by the nature, or tortuosity, of the Mg17Al12-network in the material.

Mg-alloy; AZ91D; Mechanical properties; Microstructure; Interconnectivity; Metallography; Grain size; Dendrite arm spacing; 3D reconstruction

Chemistry and Materials Science, Biomaterials

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Influence of Dendritic and Equiaxed Microstructure of Tensile Properties Variation in AZ91D

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