Effect of high magnetic field on alloy carbide precipitation in an Fe-C-Mo alloy

被引:20
作者
Hou, T. P. [1 ]
Li, Y. [1 ]
Wu, K. M. [1 ]
机构
[1] Wuhan Univ Sci & Technol, Int Res Inst Steel Technol, Wuhan 430081, Peoples R China
关键词
Alloys; Phase transitions; Precipitation; High magnetic fields; Transmission electron microscopy; MEDIUM-CARBON STEEL; PHASE-EQUILIBRIA; FERRITE TRANSFORMATION; 773-993; K; KINETICS; BAY;
D O I
10.1016/j.jallcom.2012.02.153
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The effect of a 12-T high magnetic field on molybdenum carbide precipitation during isothermal transformation in an Fe-C-Mo alloy was investigated. Three kinds of alloy carbides (M2C, M3C and M6C) were precipitated when specimens were treated both with and without a 12-T magnetic field. The precipitation of (Fe, Mo)(6)C started from the early stage under the high magnetic field, whereas it happened late during conventional treatment. The observed results suggested that the precipitation of (Fe, Mo)(6)C was remarkably promoted when specimens were treated in a 12-T magnetic field. In the meantime, the concentration of substitutional solute atoms Fe and Mo in the carbide of (Fe, Mo)(6)C was greatly influenced by a strong magnetic field. The promotion of specific alloy carbide and the substitutional solute atom concentration change in alloy carbides were attributed to their magnetization differences, which resulted in the change of Gibbs magnetic free energy of the alloy carbides. The investigation of alloy carbide precipitation under high magnetic fields could contribute to a better understanding of phase transformation of alloy carbides and to the heat-treatment and fabrication of high-strength energy materials. (C) 2012 Elsevier B. V. All rights reserved.
引用
收藏
页码:240 / 246
页数:7
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