Microstructural control of weld heat-affected zone of steel by Mn depletion around non-metallic inclusions

Shuji Aihara, Genichi Shigesato, Masaaki Sugiyama, Ryuji Uemori

Research output: Contribution to journalReview articlepeer-review

Abstract

Role of Mn depleted zone formed around MnS precipitate in transformation of intra-granular ferrite (IGF) in low alloy steel subjected to simulated thermal cycle of weld heat-affected zone (HAZ) was studied. Mn distribution in austenite (γ) adjacent to MnS were examined by field-emission type transmission electron microscope (FE-TEM) with energy dispersive X-ray spectroscopy (EDS). Foil samples for TEM were prepared using focused ion beam (FIB), which enabled a direct measurement of Mn concentration profiles near MnS. Change in area fraction of IGF with thermal cycle conditions was well explained by the extent of Mn depletion. It was concluded that the formation of IGF was controlled strongly by the Mn depletion effect in low alloy steels.

Original languageEnglish
Pages (from-to)43-48
Number of pages6
JournalNippon Steel Technical Report
Issue number91
Publication statusPublished - Jan 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Microstructural control of weld heat-affected zone of steel by Mn depletion around non-metallic inclusions'. Together they form a unique fingerprint.

Cite this