The effect of manganese and nickel segregation on allotriomorph ferrite nucleation in austenite grain boundary
The effect of manganese and nickel segregation on allotriomorph ferrite nucleation from austenite grain boundary was investigated.The chemical compositions of steels were Fe-0.3C-1Mn and Fe-0.3C-1Ni (mass%).These steels had the same Ae3 temperature calculated by Thermo-calc.The steels were transformed at the same temperature.The number of nucleated ferrite from austenite grain boundary in Fe-C-Mn steel was less than that in Fe-C-Ni.Manganese and nickel segregations in austenite grain boundary were measured by aberration corrected STEM equipped with EDS.Both Mn and Ni were enriched in austenite grain boundary.Manganese exhibited higher enrichment than nickel.It is considered austenite grain boundary energy in Fe-C-Mn steel is lower than that in Fe-C-Ni steel,as the result,the nucleation rate in Fe-C-Mn is lower than in Fe-C-Ni.
Grain boundary segregation Ferrite nucleation STEM X-ray microanalysis
Shunsuke TANIGUCHI Genichi SHIGESATO Kazuhiro FUKUNAGA Yoshiyuki WATANABE
Advanced Technology Research Labs.,Nippon Steel Corp.,Futtsu,Chiba,Japan Kimitsu R&D Lab.,Nippon Steel Corp.,Kimitsu,Chiba,Japan
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-5
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）