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| 1 | Effect of Electromagnetic Stirring on Fine Grain Formation and Tensile Property Improvement for Fe-Ni Superalloy显示文摘Due to its excellent creep rupture strength and low cost,superalloy GH2984 has becoming a promising material to be used as heat exchanger in the prospective 700℃fossil power plant.The mechanical strength,which is a particularly important indicator for the superalloy,strongly depends on the grain size and crabide distribution.In current study,we have investigated the influence of a rotating magnetic field(RMF)on the solidified microstructures and tensile properties of superalloy GH2984.RMF has been applied to provide a forced convection within the solidifying melt.The melt stirring by a sufficiently high magnetic field provides homogeneous grain size and elements distribution in the sample volume.Meanwhile,yield strength is found to be effectively enhanced for the sample solidified under magnetic field.The result has demonstrated that the RMF method on the melt solidification process shows a promising perspective for refining the grains and promoting the mechanical strength of superalloy GH2984. | JIA Peng LU Hui ZUO Xiao-wei WANG En-gang HE Ji-cheng | 2012 | Journal of Iron and Steel Research(International)2012，19，S1： | 0 |
| 2 | Evolution of Microstructure for Superalloy Inconel 625 by Electromagnetic Stirring显示文摘Due to its excellent creep rupture strength and prominent corrosion resistant properties under various circurmstances,superalloy lnconel 625 has been extensively used in aviation industry and chemical industry.The mechanical strength,which is a particularly important indicator for the superalloy,strongly depends on the matrix structure and crabide distribution.In current study,we have investigated the influence of linear travelling magnetic field(LMF)on the solidified microstructures of superalloy Inconel 625.The result has demonstrated that the solidification route is not affected but the size and amount of NbC and Laves+γeutectic structure are significantly influenced by the application of electromagnetic field due to the introduction of a forced convection which changes the diffusion process of element niobium.The application of LMF has increased the mount of NbC with larger size,as well as the fraction of eutectic structnre.Furthermore,Compared to the normal cooling condition,the Nb and Mo elements were observed to be enriched in the interdendritic area with LMF,which is confirmed to be the main reason to enhance the growth of carbide and Laves phase in solidification process. | JIA Peng LU Hui LI Rui REN Zhan-you WANG En-gang HE Ji-cheng | 2012 | Journal of Iron and Steel Research(International)2012，19，S1： | 0 |
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