Effect of abrasive water jet peening on NaCl-induced hot corrosion behavior of Ti–6Al–4V

V. Chakkravarthy, J. P. Oliveira, Anisa Mahomed, Nan Yu, P. Manojkumar, M. Lakshmanan, Long Zhang, V. Raja, S. Jerome, T. Ram Prabhu, R. L. Narayan

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Hot corrosion studies were performed on pristine and abrasive water jet peened (AWJP) Ti–6Al–4V surfaces. Oxide scales form on the peened and pristine surfaces when coated with NaCl and exposed to 600 °C for 100 h. Despite similar oxide compositions on both surfaces, the thickness and roughness of the oxide scale on the AWJ peened surface is lower. The hot corrosion rate of the pristine surface is 2.5 times higher than that on the AWJ peened surface. Enhanced hot corrosion resistance of the latter is attributed to compressive residual stresses on the surface that retards diffusion of chloride in the material.

Original languageEnglish
Article number111872
Number of pages10
JournalVacuum
Volume210
Early online dateFeb 2023
DOIs
Publication statusPublished - Apr 2023

Keywords

  • Abrasive cavitation peening
  • Compressive residual stress
  • Hot corrosion
  • NaCl molten Salt
  • Ti–6Al–4V alloy

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