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<p>Microscale texturing of metallic surfaces via laser-powder bed fusion (L-PBF) is an effective strategy for protection against material deterioration under cavitation. Herein, linear channel and rectangular pocket-shaped micro-textures were created on 17-4PH stainless steel through additive manufacturing (AM) and subjected to ultrasonic cavitation erosion (CE) and cavitation erosion-corrosion (CEC) conditions. Compared to AM flat sample, rectangular pocket micro-textured sample shows 7-8 times greater resistance to CE and CEC. Such enhanced CEC resistance is attributed to the dampening effect of shockwaves by liquid micro-reservoir. Furthermore, the mechanical properties, electrochemical corrosion testing, microstructure, and micromorphology of deteriorated samples and their synergistic effect were investigated. The current study shows that AM-based micro-texturing is a promising solution for large-scale protection against CEC in hydraulic and marine applications.</p>

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Influence of Surface Texturing on Cavitation Erosion Behavior of 17-4PH Stainless Steel Manufactured Through Powder Bed Additive Manufacturing

  • 期刊论文

  • 发表日期：

    2025年3月8日

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  • Amit Raturi,
  • Mayank Garg,
  • Harpreet S. Grewal,
  • Harpreet S. Arora

摘要

Microscale texturing of metallic surfaces via laser-powder bed fusion (L-PBF) is an effective strategy for protection against material deterioration under cavitation. Herein, linear channel and rectangular pocket-shaped micro-textures were created on 17-4PH stainless steel through additive manufacturing (AM) and subjected to ultrasonic cavitation erosion (CE) and cavitation erosion-corrosion (CEC) conditions. Compared to AM flat sample, rectangular pocket micro-textured sample shows 7-8 times greater resistance to CE and CEC. Such enhanced CEC resistance is attributed to the dampening effect of shockwaves by liquid micro-reservoir. Furthermore, the mechanical properties, electrochemical corrosion testing, microstructure, and micromorphology of deteriorated samples and their synergistic effect were investigated. The current study shows that AM-based micro-texturing is a promising solution for large-scale protection against CEC in hydraulic and marine applications.