Materials Letters | 2021

Microstructure evolution induced by the intrinsic heat treatment occurring during wire-arc additive manufacturing of an Al-Mg-Zn-Cu crossover alloy

 
 
 
 
 
 

Abstract


Abstract The implementation of wire-arc additive manufacturing for fabricating complex structures requires detailed knowledge of process-structure-property relationships. Results of scanning electron microscopy, wide-angle X-ray scattering, small-angle X-ray scattering, and microhardness measurements are presented to identify the mechanisms that govern the microstructure formation of an Al-Mg-Zn-Cu crossover alloy during wire-arc additive manufacturing. These analyses provide evidence on the formation of Mg-, Zn- and Cu-rich phases on different length scales spanning from ~10\xa0µm (microsegregations), down to a few nm (bulk) following the intrinsic heat treatment. Future alloy concepts should build on the presented findings.

Volume 303
Pages 130500
DOI 10.1016/J.MATLET.2021.130500
Language English
Journal Materials Letters

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