Effects of a magnetic field on diffusional transformation in steels

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420749
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Material processing/Microstructural control engineering
• Research Institution: National Institute for Materials Science
• Principal Investigator: Ohtsuka Hideyuki 国立研究開発法人物質・材料研究機構, 構造材料研究拠点, 主席研究員 (10343857)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 強磁場 / 拡散変態 / フェライト / 磁気モーメント / 18Ni マルエージング鋼 / Ms点 / パーライトの球状化

Outline of Final Research Achievements

Effects of a high magnetic field on diffusional transformtion behavior and structure are investigated. The magnetic moment of ferrite phase, which is necessary for the calculation of transformation temperature in a magnetic field, has been obtained by first-principles calculation. The magnetic moment of Fe increases with the addition of C,N and B. The magnetic moment of Fe with the addition of Al or Si decreases and that with Ni and Cu increases. The Ms temperature of 18 Ni maraging steel increases with the increase of applied magnetic field. The effects of a magnetic field on the spheroidization of pearlite was not observed.

Free Research Field

材料組織