Chemistry and morphology of beta ' precipitates in an aged Mg-Nd-Y-Zr alloy

摘要

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.