Reducing corrosion of additive manufactured magnesium alloys by interlayer ultrasonic peening

M. P. Sealy, R. Karunakaran, S. Ortgies, G. Madireddy, A. P. Malshe, K. P. Rajurkar

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)179-182
Number of pages4
JournalCIRP Annals
Volume70
Issue number1
DOIs
StatePublished - Jan 2021

Keywords

  • Additive manufacturing
  • Hybrid manufacturing
  • Magnesium

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

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