Chemistry and Morphology of beta ` Precipitates in an Aged Mg-Nd-Y-Zr Alloy

Emmanuelle Marquis

Ellen Sitzmann and Emmanuelle A Marquis (2015)


While the Mg-Y-Nd system is used for industrial applications, the details of the precipitation sequence and exact role of each alloying element during ageing have not been fully quantified. Focusing on WE43, a Mg-Y-Nd alloy containing Zr, the chemistry of beta ` precipitates and matrix during isothermal ageing at 250 degrees C is investigated using atom probe tomography. Precipitate morphologies and compositions are compared with previous electron microscopy observations, and the roles of the alloying elements are discussed.

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