|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Ultrafine Grained Materials IX
||Introducing Superplastic Properties in a ZK10 Magnesium Alloy by ECAP
||Roberto B Figueiredo, Terence G Langdon
|On-Site Speaker (Planned)
||Roberto B Figueiredo
Magnesium alloys have proved to exhibit excellent superplastic properties after being processed by severe plastic deformation techniques. The present work reports experimental results of high temperature testing of a commercial alloy. Equal channel angular pressing is used to process a Mg-1% Zn-0.5% Zr alloy from the rolled condition. It is shown that the grain size reduces to the range of a few microns after processing. Tensile testing at 473 K and 523 K at different strain rates reveal that the material exhibits elongations up to ~750% which suggests superplastic deformation. However, the stress exponent is higher than expected for superplasticity. The results are then discussed in terms of the rate controlling mechanism operating in these conditions.