Microscopic observation of precipitation behavior at friction stirring zone of super duplex stainless steel

Itto Sugimoto, Seung Hwan C. Park, Satoshi Hirano, Hikaru Saito, Satoshi Hata

Research output: Contribution to journalArticle

Abstract

To investigate the precipitation behavior of super duplex stainless steel in its weld by friction stir welding (FSW) at a low welding speed, we carried out microstructural observation and analysis. An intermetallic compound phase, ·, was observed in the heat affected zone (HAZ). The · phase precipitated at the interfaces between ¤-Fe (ferrite) and £ -Fe (austenite) grains 12 mm away from the stir zone (SZ)/HAZ boundary. On the other hand, the Cr2N was observed together with the belt-like £ -Fe grain aggregates in the vicinity of the advancing side (AS) of the SZ. The other intermetallic phase,», was also observed at a triple junction of £ -Fe grains. This demonstrates that the precipitation of the Cr2N and» phases correlates with the transformation of ¤-Fe to £A-Fe (secondary austenite).

Original languageEnglish
Pages (from-to)2003-2007
Number of pages5
JournalMaterials Transactions
Volume60
Issue number9
DOIs
Publication statusPublished - Jan 1 2019

Fingerprint

Stainless Steel
Heat affected zone
stirring
Austenite
Intermetallics
stainless steels
heat affected zone
friction
Stainless steel
Friction
austenite
Friction stir welding
intermetallics
Ferrite
friction stir welding
Welding
Welds
welding
ferrites

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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Microscopic observation of precipitation behavior at friction stirring zone of super duplex stainless steel. / Sugimoto, Itto; Park, Seung Hwan C.; Hirano, Satoshi; Saito, Hikaru; Hata, Satoshi.

In: Materials Transactions, Vol. 60, No. 9, 01.01.2019, p. 2003-2007.

Research output: Contribution to journalArticle

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