Reducing Corrosion of Additive Manufactured Magnesium Alloys by Interlayer Ultrasonic Peening

Authors

M. P. Sealy, University of Nebraska-LincolnFollow
R. Karunakaran, University of Nebraska-Lincoln
S. Ortgies, University of Nebraska-Lincoln
G. Madireddy, University of Nebraska-Lincoln
A. P. Malshe, Purdue UniversityFollow
K. P. Rajurkar, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

2021

Citation

CIRP Annals – Manufacturing Technology 70 (2021), pp. 179–182

doi: 10.1016/j.cirp.2021.04.052

Comments

Copyright © 2021 CIRP. Published by Elsevier Ltd. Used by permission.

Abstract

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.