Nanoscale partitioning of Mn between austenite and martensite revealed by Curie temperature variations |
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| Authors: | P. Dastur R. Rahimi V. Klemm B. C. De Cooman |
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| Affiliation: | 1. The Complex Laboratory of Hot Deformation &2. Thermomechanical Processing of High Performance Engineering Materials, School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran , Tehran, Iran;3. Institute of Iron and Steel Technology, Technische Universit?t Bergakademie Freiberg , Freiberg, Germany;4. Institute of Materials Science, Technische Universit?t Bergakademie Freiberg , Freiberg, Germany;5. Graduate Institute of Ferrous Technology, Pohang University of Science and Technology , Pohang, South Korea |
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| Abstract: | The partitioning of Mn between deformation-induced martensite and austenite phases of a Fe?18Mn?2Al?2Si?0.04C high-Mn steel was studied by tracking variations in the Curie temperature of martensite after exposure to successively higher annealing temperatures. The increase in Curie temperature was justified by the Mn depletion of martensite. Assuming a linear relationship between the Curie temperature and Mn concentration, the average Mn concentration of martensite was expressed as a function of annealing temperature. The proposed method, which is applicable in a dilatometer with inductive heating, enables the ready estimation of Mn partitioning in intercritically annealed medium- and high-Mn steels. |
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| Keywords: | Medium-/high-Mn steel Mn partitioning dilatometry Curie temperature |
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