The effect of Mn-rich precipitates on the strength of AZ31 extrudates

Stanford, Nicole and Atwell, Dale 2013, The effect of Mn-rich precipitates on the strength of AZ31 extrudates, Metallurgical and materials transactions A, vol. 44, no. 10, pp. 4830-4843.

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Title The effect of Mn-rich precipitates on the strength of AZ31 extrudates
Author(s) Stanford, Nicole
Atwell, Dale
Journal name Metallurgical and materials transactions A
Volume number 44
Issue number 10
Start page 4830
End page 4843
Total pages 14
Publisher Springer
Place of publication Berlin, Germany
Publication date 2013-10
ISSN 1073-5623
1543-1940
Summary The commercial magnesium alloy AZ31 has been subjected to a range of solution treatment regimes. These have then been extruded and their microstructure, texture, and precipitate populations characterized along with their mechanical properties. During the solution treatment, Mn-enriched particles develop and these remain largely unchanged throughout subsequent processing steps. A direct link between grain size and texture has been found, with coarser-grained specimens showing sharper textures. VPSC modeling has been used to quantify the effect of texture on the tensile yield strength, and it has been found that sharper textures have larger tensile yield strengths. Since coarser grain sizes have reduced Hall–Petch hardening, but have an additional texture-strengthening component, a region on the Hall–Petch plot for tension has been identified in which there is an insensitivity of strength to grain size. This has been quantitatively modeled and a texture-modified Hall–Petch plot for tension has been developed. The Mn-rich particles have also been shown to provide precipitate strengthening to the alloy of up to 40 MPa. The compressive behavior was clearer, with the compressive yield strength being directly correlated to grain size and unaffected by texture or precipitation hardening.
Language eng
Field of Research 109999 Technology not elsewhere classified
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Persistent URL http://hdl.handle.net/10536/DRO/DU:30055356

Document type: Journal Article
Collection: Institute for Frontier Materials
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