Microstructure and properties in friction stir weld of 12Cr steel

P. Hua, S. Moronov, C. Z. Nie, Y. S. Sato, H. Kokawa, S. H.C. Park, S. Hirano

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Friction stir welding was employed for joining of 12Cr heat resistant ferritic steel. Microstructure and mechanical properties in the obtained welds were examined and their relationship was established. The stir zone microstructure was found to consist of quenched martensite with numerous fine dispersoids uniformly distributed in grain interiors. The formation of this microstructure remarkably strengthened the stir zone. Tempering for 3·6 ks at 923 K reduced the as welded hardness of friction stir weld to nearly base material level.

Original languageEnglish
Pages (from-to)76-81
Number of pages6
JournalScience and Technology of Welding and Joining
Volume19
Issue number1
DOIs
Publication statusPublished - 2014 Jan 1

Keywords

  • 12Cr heat resistant ferritic steel
  • Friction stir welding
  • Martensite
  • Microstructure properties relationship

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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