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PHASE TRANSFORMATION AND CHARACTERISTICS IN freckle AREAS FOR INCONEL 625 SUPERALLOY

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Acta Metallurgica Sinica(English Letters) 2005年第1期18卷 47-54页

作者： J.X.Dong M.C.Zhang Y.P.Zeng X.S.Xie UniversityofScienceandTechnologyBeijing Beijing100083China

The freckle formation and their phase characterizatics in freckle areas were investigated by means of microstructure analysis approaches and a thermodynamic equilibrium phase calculation method in an Inconel 625 allay. These results show that in freckle areas a large number of M6C, MC, Laves and δ phases precipitate in grain boundaries even within grain due to the enrichment and segregation of Mo and Nb during solidification, which results in almost of these freckle areas covered by these complex precipitated phases and induces small grains in freckle areas. Equilibrium phase and liquid segregation calculation can give a reasonable interpretation of the freckle feature for this alloy.

关键词： freckle superalloy Inconel 625 thermodynamic calculation

2-Dimensional FEM modeling of macrosegregation in the directional solidification with mesh adaptation

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Acta Metallurgica Sinica(English Letters) 2009年第3期22卷 233-240页

作者： Weitao LIU Changchuan XIE Michel Bellet Hervé Combeau Beijing Metallurgical Technology Research Institute CCTEC Engineering Corporation Limited Beijing 100081 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China Ecole des Mines de Paris Sophia Antipolis 06904 France and Ecole des Mines de Nancy Nancy 54042France

In order to improve the prediction accuracy of macrosegregation channel, an algorithm for dynamic remeshing is proposed. The basic idea is to generate fine elements near the liquidus isotherm. The norm of the gradient of solid fraction is used for piloting the remeshing in the mushy zone; whereas, the objective mesh size in the liquid is considered as a function of the distance to the liquidus isotherm. The efficiency of mesh adaptation is demonstrated by prediction of macrosegregation channel in a case of unidirectional solidification.

关键词： freckle Solidification Modeling Adaptive remeshing

Effect of transverse static magnetic field on radial microstructure of hypereutectic aluminum alloy during directional solidification

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Journal of Materials Science & Technology 2021年第17期76卷 207-214页

作者： Shaodong Hu Long Hou Kang Wang Zhongmiao Liao Wen Zhu Aihua Yi Wenfang Li Yves Fautrelle Xi Li School of Materials Science and Engineering Dongguan University of TechnologyDongguan 523808China State Key Laboratory Advanced Special Steel Shanghai UniversityShanghai 200072China School of Materials Science and Engineering Xi'an Jiaotong UniversityXi'an710049China SIMAP-EPM-Madylam/G-INP/CNRS.PHELMA.38402 St Martin d'Heres Cedex.France

The effect of different scales thermoelectric magnetic convection(TEMC)on the radial solidification microstructure of hypereutectic Al alloy has been investigated under transverse static magnetic field during directional solidification,focusing on the formation of *** experimental and numerical simulation results indicate that the TEMC circulation at sample scale under transverse static magnetic field leads to the enrichment of solute Al on one side of the *** TEMC and the solute enrichment degree increase with the increase of magnetic field when the magnetic field increases to 0.5 *** enrichment degree of solute elements under magnetic field is affected by temperature gradient and growth *** non-uniform distribution of solute Al in the radial direction of the sample results in the non-uniform distribution of primary dendrite arm spacing(PDAS).Moreover,the applied magnetic field can lead to freckle formation and its number increases with the increase of magnetic *** change of freckle is consistent with the anisotropy TEMC caused by the anisotropy of primary dendrite or primary dendrite network under magnetic ***,the mechanism of synergism effect of the anisotropy TEMC,the distribution of solute Al and the PDAS on freckle formation and evolution is studied during directional solidification under magnetic field.

关键词： Static magnetic field Directional solidification Melt flow Radial solidification microstructure freckle

Observation on the effect of licorice flavonoid Chinese herbal medicine spotting cream combined with Awei A capsule in the treatment of psoriasis

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Journal of Hainan Medical University 2018年第21期24卷 65-68页

作者： Min Jin Ran Zhou Hui Li Xiao-Yun Ma Qu-Long Qiao Cheng-Wen Xie Changsha Medical University Hunan Changsha410219

Objective: To study the curative effect of licorice flavonoid Chinese herbal frond cream combined with Awei A capsule in the treatment of psoriasis. Methods: During the period from April 2016 to March 2018, a total of 116 patients with psoriasis in our hospital were randomly divided into the experimental group (the treatment of licorice flavonoids and Chinese acupoint cream combined with Awei A capsule) and the control group (single use) Avi A capsule treatment). Comparison of blood lipid metabolism indexes (high-density lipoprotein, apolipoprotein, low-density lipoprotein) and serum biochemical indicators (neutrophil elastase, endogenous inhibitor of NE, placental cadherin) statistical difference in content. The statistical differences between PASI score and DLQI score before and after treatment were compared between the two groups. At the end of treatment, the statistical difference between the clinical efficacy and the incidence of adverse reactions was compared between the two groups. Results:The levels of serum NE, Trappin-2 and P-cad in patients before and after treatment showed a significant downward trend. The content of NE, Trappin-2 and P-cad in the experimental group was significantly lower than that in the control group. The content of HDL-C in lipid metabolism index increased significantly before and after treatment, and the content of APOA and LDL-C decreased significantly. The content of HDL-C in the experimental group was significantly higher than that in the control group. The content of APOA and LDL-C was significantly lower than that of the control group. The PASI score and DLQI score of patients before and after treatment decreased significantly. After treatment, the PASI score and DLQI score of the experimental group were significantly lower than those of the control group. The clinical efficacy of the two groups was significantly different. The efficacy of the experimental group was significantly better than that of the control group. The skin

关键词： Licorice flavone Chinese medicine freckle ointment Avea capsule Psoriasis Curative effect