Thermal aging effects on mechanical and electrochemical properties of stainless steel weld overlay cladding

X. Y. Cao, P. Zhu, T. G. Liu, Y. H. Lu, T. Shoji

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

An investigation on mechanical property and electrochemical behavior of the cladding materials aged at 400 °C for different times was carried out by small punch test (SPT) and double loop electrochemical potentiokinetic reactivation (DL-EPR) test. The results showed that thermal aging contributed to spinodal decomposition and G-phase formation in the aged ferrite phase, as well as increase of nano-hardness of ferrite phase. The SP energy by the small punch tests decreased with increase of thermal aging time, which was related to the lattice distortions in G-phase and aged ferrite phase and their interactions with dislocations during deformation process. Thermal aging promoted corrosion and intergranular corrosion susceptibility of the cladding materials. Combined effects of G-phase and spinodal decomposition lowered intergranular corrosion resistance of the cladding material.

Original languageEnglish
Pages (from-to)111-120
Number of pages10
JournalSurface and Coatings Technology
Volume344
DOIs
Publication statusPublished - 2018 Jun 25

Keywords

  • Intergranular corrosion
  • Mechanical property
  • Spinodal decomposition
  • Stainless steel weld overlay cladding
  • Thermal aging

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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