Reducing corrosion of additive manufactured magnesium alloys by interlayer ultrasonic peening

Additive manufad (AM) magn alloys corrode rapidly due to tensile stress and coarse microstructures. Cyclically combining (hybridizing) additive manufacturing with interlayer ultrasonic peening was proposed as a solution to improve corrosion resistance of additive manufactured magnesium WE43 alloy th...

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Bibliographic Details
Published inCIRP annals Vol. 70; no. 1; pp. 179 - 182
Main Authors Sealy, M.P., Karunakaran, R., Ortgies, S., Madireddy, G., Malshe, A.P., Rajurkar, K.P.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2021
Subjects
Additive manufacturing
Hybrid manufacturing
Magnesium
Hybrid manufacturing
Additive manufacturing
Magnesium
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Summary:Additive manufad (AM) magn alloys corrode rapidly due to tensile stress and coarse microstructures. Cyclically combining (hybridizing) additive manufacturing with interlayer ultrasonic peening was proposed as a solution to improve corrosion resistance of additive manufactured magnesium WE43 alloy through strengthening mechanisms and compressive residual stress. Applying interlayer peening work hardened discrete layers and formed a glocal integrity of regional grain refinement and subsurface compressive residual stress barriers. Tensile residual stress that typically accelerates corrosion decreased 90%. Results showed time-resolved control over corrosion was attainable by interlayer peening, and local corrosion within print cells decreased 57% with respect to as-printed WE43.
ISSN:0007-8506
DOI:10.1016/j.cirp.2021.04.052