Microstructure, Mechanical and Corrosion Properties of UNS 32205 Duplex Stainless Steel Weldment Joints by Multipass FCAW


Kisasoz A., Tumer M., Karaaslan A.

PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY, vol.58, no.6, pp.332-353, 2021 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 58 Issue: 6
  • Publication Date: 2021
  • Doi Number: 10.1515/pm-2021-0025
  • Title of Journal : PRAKTISCHE METALLOGRAPHIE-PRACTICAL METALLOGRAPHY
  • Page Numbers: pp.332-353

Abstract

In this study, the effect of multipass welding on the microstructure, mechanical and corrosion properties of the UNS 32205 duplex stainless steels (DSS) is investigated. The UNS 32205 DSS is welded in 3 or 7 passes by flux-cored arc welding (FCAW) using E2209 T1-1/4 flux cored wire. The weldments are characterized by light optical microscopy (LOM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Feritscope analysis, Charpy impact tests and electrochemical corrosion tests. The results suggest that the multipass FCAW process induces the formation of gamma(2 )in the weld seam. The mechanical and the corrosion properties of the weld joints are affected by the heat input variation and the phase transformations. Especially, the formation of the gamma(2) in the weld seam results in a decrease in the corrosion resistance of the joint samples.