Working Paper Communication Version 1 This version is not peer-reviewed

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

Version 1 : Received: 22 October 2020 / Approved: 23 October 2020 / Online: 23 October 2020 (09:28:12 CEST)

How to cite: Jarfors, A.E.W.; Xanjie, Y.; Xia, H.; Yu, A.; Andersson, N. Influence of Dendritic and Equiaxed Microstructure of Tensile Properties Variation in AZ91D. Preprints 2020, 2020100473 Jarfors, A.E.W.; Xanjie, Y.; Xia, H.; Yu, A.; Andersson, N. Influence of Dendritic and Equiaxed Microstructure of Tensile Properties Variation in AZ91D. Preprints 2020, 2020100473

Abstract

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.

Subject Areas

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

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