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| 1 | NUMERICAL SIMULATION OF THE THERMO-MECHANICAL PROCESS FOR BEAM BLANK CONTINUOUS CASTING显示文摘The aim of this study was to simulate the solidification process of beam blank continuous casting, and then find the reasons for the typical defects of the beam blank. A two-dimensional transient coupled finite element model has been developed to compute the temperature and stress profile in beam blank continuous casting. The enthalpy method was used in the heat conduction equation. The thermo-mechanical property in the mushy zone was taken into consideration in this calculation. It is shown that at the mold exit the thickness of the shell had its maximum value at the flange tip and its minimum value at the fillet. The temperature had a great fluctuation on the surface of the beam blank in the secondary cooling zone. At the unbending point, the surface temperature of the web was in the brittleness temperature range under the present condition. To ensure the quality, it is necessary to weaken the intensity of secondary cooling. At the mold exit the equivalent stress and strain have higher values at the flange tip and at the web. From the spray 1 to the unbending point, the maximum values of stress and strain gradually moved to the internal section of the flange tip and the web. However, whenever, there were bigger stress and strain values near the flange tip and the web than in the other parts, it must be very easy to generate cracks at those positions. Now, online verification of this simulation has been developed, which has proved to be very useful and efficient to instruct the practical production of beam blank continuous casting. | W. Chen Y.Z. Zhang C.J. Zhang L.G. Zhu B.X. Wang W.G. Lu J.H. Ma | 2007 | Acta Metallurgica Sinica(English Letters)2007，20，4： | 8 |
| 2 | EFFECT OF OVERLAPPING TREATMENT ON MICROSTRUCTURE OF LASER-CLAD WC/Ni60A COMPOSITE COATING显示文摘The effect of overlapping treatment on microstructure of laser clad WC/Ni60A composite coating was studied with XRD, SEM, TEM and SAED etc. The results show that during the overlapping treatment the existence of the residual heat and edge angle effect on the substrate has changed the composition and microstructure of the coating by raising the fusion temperature and increasing the dilution degree of the coating. | C.Z. Chen 1,2) , X.D. Liu 3) , S.J. Zhang 4) , D.W. Cui 1) , T.Q. Lei 2) and J.H. Yu 1) 1) College of Material Science and Technology, Shandong University of Technology, Jinan 250061, China 2) College of Material Science and T | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 6 |
| 3 | SURFACE ANALYSIS OF ALUMINUM ALLOYS INFLUENCED BY SULFATE- REDUCING BACTERIA显示文摘The morphology and chemical compositions of surface and corrosion phases for two aluminum alloys(7075 and 2024 ) in the aqueous mediums containing sulfate reducing bacteria(SRB) were studied by the methods of scanning electron microscopy (SEM) and energy dispersive x ray analysis (EDXA). The results showed that serious pitting corrosion took place when aluminum alloys were exposed in the mediums containing SRB, whereas no pitting corrosion were found on the surfaces of aluminum alloys only exposed in blank mediums non containing SRB. It was demonstrated with EDXA that corrosion of aluminum alloys exposed in the solutions containing SRB, whereas the corrosion in the solution non containing microorganisms was attributed to the presence of chloride ions(Cl ). | X. L. Wu, J.H. Liu and X.Y. Chen Department of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，5： | 6 |
| 4 | Carbide Formation Process in Directionally Solidified MAR-M247 LC Superalloy显示文摘Carbide nucleation, growth and trapping behavior in directionally solIdified MAR-M247 LC alloyand the corresponding mechanism have been investigated. Carbide forming element enrichmentcontrols the carbide nucleation and the carbide growth behavior. If the carbide forming elementenrichment and the nucleation sites are suitable, carbide nucleation can occur both above andbelow the liquidus temperature. Heterogeneous carbide nucleation is the preferred nucleationmechanism at low carbide forming element enrichment. Carbide growth occurs mainIy at inter-secondary ry dendrite arm area and lower part of the mushy zone. The carbides are subsequentlytrapped at these positions after growing to a certain size. Some carbides are only partially trappedby the solid-liquid interface and the carbide growth accelerates after being partially trapped. Acritical growth rate exists between 2×10-6 m/s and 5 ×10-6 m/s. The carbide volume fractiondecreases in the directionally solidified part at slow growth rate that is caused by the lack ofsuitable growth site and the low trapping ability of the solid-liquid | Chen, Jian Huang, Baiyun Lee, J.H. Choe, S.J. Lee, Y.T. | 1999 | Journal of Materials Science & Technology1999，15，1： | 5 |
| 5 | A transmission electron microscopy study of microscopic causes for localized-corrosion morphology variations in the AA7055 Al alloy显示文摘By Using(scanning) transmission electron microscopy, localized-corrosion morphology variations of the AA7055 AlZn(Cu)Mg alloy with different thermal processes and their underlying microscopic causes were investigated systematically. Our study shows that the corrosion resistance of the nanoscale precipitates varies with their structure type and Cu-content. Just like the Al-matrix, the early-stage precipitates are corrosion resistant, as compared with the η_p/η-precipitates without high Cu-content. With a high Cucontent, however, the η-precipitates become most corrosion resistant among all phases involved. Hence,tailoring the precipitate microstructure and chemistry though thermal processes may change the overall corrosion morphology and improve corrosion resistance property of the alloy. | X.B. Yang J.H. Chen G.H. Zhang L.P. Huang T.W. Fan Y. Ding X.W. Yu | 2018 | Journal of Materials Science & Technology2018，34，10： | 4 |
| 6 | COMPUTER SIMULATION OF NEURAL NETWORK CONTROL SYSTEM FOR CO_2 WELDING PROCESS显示文摘In this paper, neural network control systems for decreasing the spatter of CO2 welding have been created. The Generalized inverse Learning Architecture(GILA), the SPecialized inverse Learning Architecture(SILA)-I & H and the Error Back Propagating Model(EBPM) are adopted respectively to simulate the static and dynamic welding control processes. The results of simulation and experiment show that the SILA-I and EBPM have betted properties. The factors affecting the simulating results and the dynamic response quality have also been analyzed. | D. Fan B. Li Y.Z. Ma and J.H. Chen (Welding Institute, Gansu University of Technology,Lanzhou 730050, China) | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，1： | 3 |
| 7 | INFLUENCE OF SILICON IN STEELS ON GALVANIZED COATINGS显示文摘在钢表(0.37wt%Si ) 以后与纯 Fe 的薄层被电镀的物品 pre 在各种各样的时间沉浸于熔融的锌,在钢上的电镀涂层的微观结构的变化和 -Fe/ 接口的变化被学习。版本(精力散 sepectroscopy ) 那过多的硅在 Fe 层以后在层由于硅的低溶解度在钢底层的表面上积累的结果表演被复合的层的增加的生长弄空。与向由 Fe/Zn 反应的底层的 -Fe/ 接口的运动,充满硅的 -Fe 剥落从底层并且闯入粒子。因为充满硅的 -Fe 不能在层被吸附,粒子就象在一个 Kirkendall 效果实验的一个惰性的标记一样,通过层向层移动。在到达 / 接口以后,粒子快速在层溶解,并且加速它的生长,导致层的渐渐的消失。同时,当在层溶解的硅很快向层扩散,正常涂层快速被变成典型地代表反应的钢的涂层。一个类似的过程可以发生在电镀的起始的阶段小规模上的反应的钢,尽管它是难的被遵守。 | C.S. Che J.T. Lu G. Kong Q.Y. Xu J.H. Chen | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，2： | 2 |
| 8 | Revisiting the precipitation sequence in Al–Zn–Mg-based alloys by high-resolution transmission electron microscopy显示文摘 | J.Z. Liu J.H. Chen X.B. Yang S. Ren C.L. Wu H.Y. Xu J. Zou | 2010 | Scripta Materialia2010，，11： | 2 |
| 9 | 查看详情显示文摘 | Cai W.W Piner R.D Stadermann F.J Park S. Shaibat M.A. Ishii Y. Yang D.X. Velamakanni A. An S.J. Stoller M. An J.H. Chen D.M. Ruoff R.S | | 0，，： | 1 |
| 10 | Inhibition of Forkhead Box 01 Protects Pancreatic beta-Cells against Dexamethasone- Induced Dysfunction显示文摘 | Zhang, X. F. Yong, W. Lv, J.H. Zhu, Y. X. Zhang, J. J. Chen, F. Zhang, R. H. Yang, T. Sun,Y.J. Han, X. | 2009 | 南京医科大学学报(自然科学版)2009，29，11： | 1 |
| 11 | The Disparity in Thyroid Cancer Incidence Between Native South Korean and Korean-American Women显示文摘 | A.K. Arrington R. Nelson L. Uyeno S.L. Chen J. Kim J.H. Yim | 2012 | Journal of Surgical Research2012，，2： | 1 |
| 12 | Preparation of SnO 2 -CNTs supported Pt catalysts and their electrocatalytic properties for ethanol oxidation显示文摘 | H.L. Pang J.P. Lu J.H. Chen C.T. Huang B. Liu X.H. Zhang | 2008 | Electrochimica Acta2008，，9： | 1 |
| 13 | Effects of conductive polyaniline (PANI) preparation and platinum electrodeposition on electroactivity of methanol oxidation显示文摘 | H.H. Zhou S.Q. Jiao J.H. Chen W.Z. Wei Y.F. Kuang | 2004 | Journal of Applied Electrochemistry2004，，4： | 1 |
| 14 | Fracture behavior of 9% nickel high-strength steel at various temperatures显示文摘 | W.S. Du R. Cao Y.J. Yan Z.L. Tian Y. Peng J.H. Chen | 2007 | Materials Science & Engineering A2007，，1： | 1 |
| 15 | Phase stability and structural features of matrix-embedded hardening precipitates in Al–Mg–Si alloys in the early stages of evolution显示文摘 | M.A. van Huis J.H. Chen M.H.F. Sluiter H.W. Zandbergen | 2007 | Acta Materialia2007，，： | 1 |
| 16 | Understanding atomic structures of amorphous C-doped Ge 2 Sb 2 Te 5 phase-change memory materials显示文摘 | Konstantin B. Borisenko Yixin Chen David J.H. Cockayne Se Ahn Song Hong Sik Jeong | 2011 | Acta Materialia2011，，11： | 1 |
| 17 | Nitric Oxide Scavenging by Red Blood Cell Microparticles and Cell-Free Hemoglobin as a Mechanism for the Red Cell Storage Lesion显示文摘 | Chenell Donadee Nicolaas J.H. Raat Tamir Kanias Jesús Tejero Janet S. Lee Eric E. Kelley Xuejun Zhao Chen Liu Hannah Reynolds Ivan Azarov Sheila Frizzell E. Michael Meyer Albert D. Donnenberg Lirong Qu Darrel Triulzi Daniel B. Kim-Shapiro Mark T. Gladwin | 2011 | Circulation2011，，： | 1 |
| 18 | Cold metal transfer joining aluminum alloys-to-galvanized mild steel显示文摘 | R. Cao Gang Yu J.H. Chen Pei-Chung Wang | 2013 | Journal of Materials Processing Tech2013，，： | 1 |
| 19 | Effect of twinning and dynamic recrystallization on the high strain rate rolling process显示文摘 | S.Q. Zhu H.G. Yan J.H. Chen Y.Z. Wu J.Z. Liu J. Tian | 2010 | Scripta Materialia2010，，10： | 1 |
| 20 | Neurological and cellular regulation of visceral hypersensitivity induced by chronic stress and colonic inflammation in rats显示文摘 | J. Chen J.H. Winston S.K. Sarna | 2013 | Neuroscience2013，，： | 1 |
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