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| 1 | STRUCTURE FORMATION OF UNDERCOOLED Fe-30Ni ALLOY显示文摘Bulk Fe-30Ni alloy melt was nudercooled up to 337K by combining the glass fluxing technique with superheating-cooling cycle. Grain refinement at low undercoolings was observed in the experiment in addition to that at high undercoolings. The current grain refinement mechanisms were examined, and it is concluded that the refined gains are all developed from dendrites, however the grain refinement at low undercoolings is due to chemical superheating, while that at high undercoolings due to rapid solidification contruction. | J.F. Li, J.G. Li, X.P. Zhang and Y.H. Zhou (School of Materials Science and Engineering, Shanghai Jiao Tong University , Shanghai 200030, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，5： | 10 |
| 2 | Growth mechanism of reinforcements in in-situ synthesized (TiB+TiC)/Ti composites显示文摘The growth mechanism of reinforcement in in situ synthesized (TiB+TiC)/Ti composites was investigated. The results show that reinforcements nucleate and grow in a way of dissolution precipitation. The morphologies of reinforcements are closely related to the solidification paths and crystal structure of reinforcements. TiB, as a reinforcement, is liable to grow along [010] direction and forms in short fibre shape due to its B27 structure, whereas primary TiC is liable to form composition undercooling and grow in dendritic shape. TiC phases precipitated in binary eutectic and ternary eutectic reactions grow in equiaxial shape. The addition of aluminum element refines TiB and TiC particles, and makes TiC reinforcements grow into the equiaxial particles easily. The addition of graphite adjusts the solidification paths and forms more TiC with dendritic shape. [ | 吕维洁 张荻 张小农 郭淑玲 吴人洁 | 2001 | 中国有色金属学会会刊:英文版2001，11，1： | 8 |
| 3 | Improving the Solidified Structure by Optimization of Coil Configuration in Pulsed Magneto-Oscillation显示文摘Using both numerical and experimental methods, we studied the effect of coil configuration of pulsed magneto-oscillation(PMO) on distribution of electromagnetic field, flow field and solidification structure with the same pulse current parameters in Al ingots. We designed and constructed three types of coils: surface pulsed magneto-oscillation, hot-top pulsed magneto-oscillation(HPMO) and combined pulsed magneto-oscillation(CPMO). PMO treatment refined the solidification structure in all the ingots. The configuration of the PMO, however, introduced differences in magnetic field intensity, electromagnetic force, Joule heat, flow field, equiaxed grain zone, grain size and growth direction of columnar grains. The largest equiaxed grain zone was found in CPMO treated ingot, and the smallest grain size was found in both HPMO and CPMO treated ingots. Numerical simulation indicated that difference in electromagnetic field and flow field resulted in differences in solidification structure. HPMO is more advantageous over others for large ingot production. | Jing Zhao Ji-Hao Yu Ke Han Hong-Gang Zhong Ren-Xing Li Qi-Jie Zhai | 2018 | Acta Metallurgica Sinica(English Letters)2018，31，12： | 5 |
| 4 | Structure formation factor in cast iron solidification theory显示文摘The phase transformation in steel was studied in ref.by means of analysing n_A, thenumber of covalent electrons of the strongest bond in phase structure unit. On the | 刘志林 孙振国 李志林 | 1995 | Chinese Science Bulletin1995，40，16： | 4 |
| 5 | Interface of solid steel and liquid aluminum under nonequilibrium diffusion显示文摘The nonequilibrium diffusion of liquid aluminum atoms in cross direction in the innerpart of the solid steel base has been realized by using methods such as roughening steel plate surface, immersing flux on steel plate surface and short time diffusion, and the interface of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction was formed by using rapid solidification. The interfacial structure was studied by means of electron probe microanalysis. The results showed that the interfacial structure of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction is quite different from that of solid steel and liquid aluminum under conventional diffusion, that is, the interface of solid steel and liquid aluminum under nonequilibrium diffusion in cross direction is made up of groups of Al 13 Fe 4 teeth (which grew from the contact surface to steel base inner) at the bulges of steel plate surface and Fe Al solid solution (whose Al content is less than 3.5%) at the concaves of steel plate surface between the groups of Al 13 Fe 4 teeth. | 张鹏 杜云慧 曾大本 任学平 崔建忠 巴立民 | 2000 | 中国有色金属学会会刊:英文版2000，10，3： | 3 |
| 6 | Electro-Pulse on Improving Steel Ingot Solidification Structure显示文摘ReducingthegrainsizeofsteelcastingwillleadtotheimprovementofsteelmechbocalProperties.Inordertoproducethefinergrain,manytecboqueshavebeenappliedtocofitinuouscasting,suchaslowtemperatecasting,addinginoculatsandelectfomagneticstirringetc..Thosemethodsdo... | Yong Tang Jianzhong Wang Daqing Cang(Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China) | 1999 | International Journal of Minerals,Metallurgy and Materials1999，13，2： | 3 |
| 7 | Valence electron structure of cast iron and graphltization behaviour criterion of elements显示文摘The valence electron structure of common alloy elements in phases of cast iron is calculated- The relationship between the electron structure of alloy elements and equilibrium, non-equilibrium solidification and graphitization is revealed by defining the bond energy of the strongest bond in a phase as structure formation factor S. A criterion of graphitization behaviour of elements is advanced with the critical value of the structure formation factor of graphite and the n of the strongest covalent bond in cementite. It is found that this theory conforms to practice very well when the criterion is applied to the common alloy elements. | 刘志林 李志林 孙振国 杨晓平 陈敏 | 1995 | Science China Mathematics1995，38，12： | 3 |
| 8 | Microstructure Evolution of Semi-solid Processed Hyper-eutectic Al-30%Si Alloy显示文摘Semi-solidmetalformingtechnologyhasachievedgreatprogressinthepasttenyearsbecauseitoffersmanypotentialadvamagessuchasformingnet-shapeparts,decreaseofmicrosegregation,reductionofporosity[1--3].Thistechnologyhasbeenappliedinproductionofsomehypo-eutectic... | Yanjun Li Weimin Mao Xueyou Zhong(Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China) | 1999 | International Journal of Minerals,Metallurgy and Materials1999，13，4： | 2 |
| 9 | Simultaneous thermal and contraction/expansion curves analysis for solidification control of cast irons显示文摘The first part of the paper summarizes the performance of two mould devices,illustrating by representative shrinkage tendency results in ductile cast iron as affected by mould rigidity(green and furan resin sand moulds)and inoculant type(FeSi-based alloys).Less rigid green sand moulds encourage the formation of contraction defects,not only because of the high initial expansion values(ε(di))(max),but also because of the increased solidification undercooling.A high inoculation efficiency means not only lowering the carbides formation sensitivity and increasing the nodule count,but also a prolonged graphitization through to the end of the eutectic freezing,as observed by the high population of small late forming nodules,which leads to minimizing the tendency for shrinkage.The second part of the paper illustrates an application of this equipment to commercial foundry use.It conducts thermal analysis and volume change measurements in a single ceramic cup with cast iron quality as a variable.La-bearing FeSi inoculant appears to be more effective than RE(Rare Earth)-FeSi alloy in FeSiMgCa treated irons(no RE),in terms of reducing eutectic undercooling and(ε(di))(max),favourable for lower sensitivity to shrinkage formation.Experiments also compared solidification patterns for white[WI],grey[GI]and ductile[DI]irons,to correlate the most important events between the cooling curves and contraction curves,to evaluate the sensitivity to shrinkage formation.All of the irons have similar values for initial expansion up to the start of eutectic freezing,but,after that,the graphite formation promotes expansion(more than 5 times for nodular graphite),resulting in a difference in maximum expansion(2 times higher for DI).The graphitic expansion has two contrary effects.Increased graphitic expansion(force)leads to a higher shrinkage sensitivity during the first part of the eutectic reaction,but also to a decrease of shrinkage at the end of solidification,due to forcing the last liquid iron to occupy the previous formed cavities.Consequently,strong graphitization process promotion at the end of solidification favours the castings'soundness. | Iulian Riposan Stelian Stan Mihai Chisamera Loredana Neacsu Ana Maria Cojocaru Eduard Stefan Iuliana Stan | 2020 | China Foundry2020，17，2： | 2 |
| 10 | SOLIDIFICATION MECHANISM OF Al/TiC INTRAGRANULAR COMPOSITES FABRICATED BY CONTACT REACTION METHOD显示文摘The behaviour of the particles in solidification inter face front was studies,and the equctionof the critical inter face velocity which related to the supercooling and the volune fraction of particles in the melt was obtained.By the mean time,the two solidi fication mechanisms ofaluminium matrix intragranular composites was put forward. | WANG Zidong, HU HanqiUniversity of Science and Technology Beijing. Beijing. ChinaLI Chunyu, LI Ting, CHAI ShichangBeijing Institute of Aeronautical Materials. Beijing. China | 1994 | Acta Metallurgica Sinica(English Letters)1994，7，3： | 2 |
| 11 | Study on the Crystal Structure and Microstructure Evolution of Shock-processed Titanium Powder显示文摘Titanium powder was rapidly solidified by using shock-wave consolidation technique.The critical parameters were controlled by intrumented detonics and pin-oscillography.The compacted specimens were investigated for crystal structure and microstructural strengthening by using standard diagnostic techniques.The density of the final product was found to be greater than 96% of the theoretical value.X-ray diffraction pattern reveals intact crystalline structure without the presence of any undesired phases.The particle size reduction indicated by XRD was supported by laser diffraction based particle size analyzer.Results from energy dispersive spectroscopy ruled out the possibility of any segregation within the compacts.Scanning electron microscopy showed crack-free,voids-free,melt-free,fracture-less compacts of titanium with a unidirectional dendrite orientation without any grain-growth. | A.D.Sharma A.K.Sharma N.Thakur | 2019 | Journal of Metallic Material Research2019，2，2： | 1 |
| 12 | Solidification structure refinement of ferritic stainless steel based on heterogeneous nucleation technology显示文摘The ridging defect on the surface of stainless steel products is related to the solidification structure of ferritic stainless steel.Refining the solidification structure and increasing the proport io n of equiaxed grains are necessary to lesse n the ridging defect.Therefore,a new idea of using a heterogeneous nucieating agent which was composed of the composite core containing Ti was proposed,that is,a large amount of dispersed fine particles were initially formed on the solidification front,and a great amount ofδiron was then nucleated using these fine particles as the heterogeneous cores.Through analyzing the crystallographic relationship between different crystals and inducing the calculation formulas of disregistry,the disregistry between the different oxides and TiNδiron was explored and the type of nucleation core was determined.The key parameters of forming the composite core containing Ti were obtained through a thermodynamic calculatio n.The experimental results further con firm the correctness of the theoretical analysis. | Xiao-fang Shi Li-zhong Chang Li Zhou | 2019 | Journal of Iron and Steel Research(International)2019，26，2： | 1 |
| 13 | Physical Properties and Solidification Structure of Al-SiEutectic Alloy Melt with Cerium Modification显示文摘PhysicalPropertiesandSolidificationStructureofAl-SiEutecticAlloyMeltwithCeriumModificationLiPeijie(李培杰);GuoJingjie(郭景杰);JiaJu... | 李培杰 郭景杰 贾均 李庆春 | 1996 | Journal of Rare Earths1996，14，2： | 1 |
| 14 | Effect of final electromagnetic stirring on solidification microstructure of GCr15 bearing steel in simulated continuous casting显示文摘The effect of final electromagnetic stirring on the solidification structure,element segregation,and carbides of GCrl5 bearing steel was investigated.The experiment of continuous casting of the steel was carried out by using a continuous casting physical simulation apparatus with the final electromagnetic stirring.The liquid core profile was revealed by the pour-out method during the solidification process.Eight ingots were produced under different electromagnetic stirring parameters for comparison.The results show that,at the final stage of solidification,intense electromagnetic stirring exacerbates the central carbon segregation,resulting in more serious precipitation of the primary carbides.It is also found that the carbides in the segregation area are dominantly M3C type,together with a small amount of M7C3-type and M3C2-type carbides.In this physical simulation model,the optimal stirring parameters to obtain a fine and homogeneous structure are the liquid pool width of 15 mm,current intensity of 150 A,and stirring frequency of 5 Hz. | Dan-qing Jiang Rui Wang Qiong Zhang Zhen-qiang Zhang Ting-sheng Tu Jiang Wang Zhong-ming Ren | 2020 | Journal of Iron and Steel Research(International)2020，27，2： | 1 |
| 15 | Microstructure evolution of Cu-Mn alloy under laser rapid solidification condition ——Banded structure and planar front growth | 潘清跃 林鑫 黄卫东 李延民 周尧和 | 1998 | Progress in Natural Science:Materials International1998，8，1： | 0 |
| 16 | Effect of Refrigerant on Solidification Structure of Steel显示文摘 | Bai Yangui Song Wanli Zhang Boding | 1999 | Journal of Iron and Steel Research(International)1999，6，2： | 0 |
| 17 | Effects of Electromagnetic Stirring on Solidification of Metal Foams显示文摘Metal foams are usually used as light structural/functional materials.The nucleation,evolution and the solidification behavior of the metal foams can be influenced by the stirring mode and the foaming parameters.In this paper,the effects of electromagnetic stirring on metal foaming process were investigated.Comparative tests were carried out and the optimized parameters of the stirring modes were discussed.The stirring effects of the spiral electromagnetic field are better than the travelling wave electromagnetic field.The effects of the spiral electromagnetic-mechanical combined stirring are better than the situations of the single electromagnetic stirring or the single mechanical stirring. | HAO Hai LU Guo-qiang WANG Fu-yun ZHANG Xing-guo | 2012 | Journal of Iron and Steel Research(International)2012，19，S1： | 0 |
| 18 | THE PERIODIC LAYER IN VIBRATIONAL SOLIDIFYING TEXTURE AND ITS APPLICATION FOR IDENTIFYING THE INTERFACE显示文摘Based on experimental results,this paper presents that under specificvibrational and solidifying conditions,there are several periodic layers appearing in thecrystallization of A1-3% Mg alloy.The mechanism of the formation of periodic layer isdiscussed.Furthermore,the use of the layers to identify the solid-liquid interface and theeffect of such layers on mechanical properties of alloy have been studied. | 汪凤泉 朱正华 何德坪 魏炳波 | 1989 | Journal of Southeast University(English Edition)1989，6，1： | 0 |
| 19 | Microstructure evolution and non-equilibrium solidification of undercooled Ni-29.8at% Si eutectic alloy melts显示文摘Microstructure formation and transition of undercooled bulk Ni70.2Si29.8 eutectic alloy melt were investigated by melt fluxing,cyclical overheating and cooling under high-frequency vacuum melting.The maximum undercooling of the alloy melt amounted to 428 K.Scanning electron microscope(SEM),energy-dispersive X-ray spectroscopy(EDS) and optical microscopy techniques(OM) were adopted to investigate the microstructure and identify the phase composition.The cooling curves of eutectic alloys upon solidification which were subjected to different undercoolings were described and compared.The complex microstructure evolution was observed in the as-solidified samples with the increase of undercooling.Surprisingly,an extremely fine microstructure was achieved at the max undercooling of 428 K,and the lamellar distance of about 50-100 nm was observed.Based on the solution entropy of eutectic phases,the microstructure transition with the undercooling was analyzed.Calculated results showed that the microstructure transition process was ascribed to solution entropy of transition,i.e.,the complex microstructure evolution was attributed to a transition from faceted-faceted(FF)→faceted-nonfaceted(FN)→nonfaceted-nonfaceted(NN) eutectic systems concurring with increased undercooling. | LU YiPing1,LI TingJu1,TENG HaiTao1,FU YaBo1,LUO DaWei1 &YANG GenCang2 1 School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China 2 State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi’an710072,China | 2010 | Science China(Technological Sciences)2010，53，4： | 0 |
| 20 | In situ observation of NaBi(WO_4)_2 dendrite growth and the study on microstructure of solidification显示文摘The dendrite growth process of transparent NaBi(WO4)2 with small prandtl and high melting point was studied by using the in-situ observation system. According to the dynamic images and detailed information, there are two kinds of restriction effect on the dendrite growth, the competition between arms and branches and the convection in the melt. The dendrite growth rate was time dependent, and the rate of arm growth reached the maximum 5.8 mm/s in the diffusive-advective region and rapidly decreased in the diffusive-convective region. The growth rate of branch had the same change trends as the arm’s. Based on the EPMA-EDS data of solidifica- tion structure of quenched NaBi(WO4)2 melt, it was found that there were compo- nent differences from stoichiometric concentration in the melt near the interface during the growth process. | AI Fei, HONG Yong, JIN WeiQing, LUO HaoSu, LIU Yan & PAN XiuHong Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China | 2007 | Science China(Physics,Mechanics & Astronomy)2007，50，4： | 0 |
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