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

Shuji Aihara, Genichi Shigesato, Masaaki Sugiyama, Ryuji Uemori

研究成果: ジャーナルへの寄稿総説査読

抄録

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.

本文言語英語
ページ(範囲)43-48
ページ数6
ジャーナルNippon Steel Technical Report
91
出版ステータス出版済み - 1月 2005
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 材料力学
  • 金属および合金
  • 材料化学

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