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| 1 | Effects of welding parameters and post-heat treatment on mechanical properties of friction stir welded AA2195-T8 Al-Li alloy显示文摘In this study, the effects of main welding parameters(rotation speed(ω) and welding speed(v)) on the microstructure, micro-hardness distribution and tensile properties of friction stir welded(FSW)2195-T8 Al-Li alloy were investigated. The effects of T6 post-treatments at different solution and aging conditions on the mechanical properties and microstructure characteristics of the FSW joints were also investigated. The results show that with increasing and v, both strength and elongation of the joints increase first, and then decrease with further increase of and v. All the joints under varied welding parameters show significant strength loss, and the strength reaches only 65% of the base metal. The effect of T6 post-heat treatment on the mechanical properties of the joints depends on the solution and aging conditions. Two heat treatment processes(480℃× 0.5 h quenching + 180℃× 12 h,520℃× 0.5 h quenching + 180℃× 12 h aging) are found to increase the joint strength. Furthermore,low temperature quenching(480℃) is more beneficial to the joint strength. The joint strength can reach 85% of the base metal. Whereas both low temperature aging(140℃× 56 h) and stepped aging(100℃× 12 h + 180℃× 3 h) processes decrease the joint strength. After heat treatment all the joints show decreased ductility due to the obvious grain coarsening in the nugget zone(NZ) and thermo-mechanically affected zone(TMAZ). | J. Zhang X.S. Feng J.S. Gao H. Huang Z.Q. Ma L.J. Guo | 2018 | Journal of Materials Science & Technology2018，34，1： | 16 |
| 2 | EXPERIMENTAL INVESTIGATION AND THERMODYNAMIC CALCULATION ON PHASE PRECIPITATION OF INCONEL 740显示文摘A novel nickel-based superalloy INCONEL 740 was under development for application in ultra-supercritical superheater tubers above 750℃. The precipitation behaviors of η phase and γ’ particles of the alloy were investigated through experimental study and phase computation. Experimental results showed that η phase formed a Widmanst?tten pattern structure following long-term exposure at elevated temperatures and that the coarsening of γ’ particle follows a cube rate law:r-3 ∝ t. Thermodynamic calculation results showed that Al and Ti had an important effect on the precipitation behavior of γ’ andη phases. Two suggested novel modified alloys, wherein the Al and Ti contents were modified, were designed and melted for the experimental study. The preliminary results indicated that the modified alloys exhibited higher structural stability following long-term exposure at 750℃ till 5000h. | S.Q. Zhao* Department of Physics, Ningxia University, Yinchuan 750021, China Y. Jiang Department of Materials Science, The Northwest Second Nationalities Institute, Yinchuan 750021, China J.X. Dong and X.S. Xie High Temperature Materials Research Laboratories, University of Science and Technology Beijing, Beijing 100083, China | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，6： | 11 |
| 3 | Regional ozone pollution and observation-based approach for analyzing ozone–precursor relationship during the PRIDE-PRD2004 campaign显示文摘 | Y.H. Zhang H. Su L.J. Zhong Y.F. Cheng L.M. Zeng X.S. Wang Y.R. Xiang J.L. Wang D.F. Gao M. Shao S.J. Fan S.C. Liu | 2008 | Atmospheric Environment2008，，25： | 5 |
| 4 | EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION OF MOLD TEMPERATURE FIELD IN CONTINUOUS CASTING OF STEEL显示文摘模子是连续的扔机器的心。水里的热转移和团结冷却了模子在钢的连续的扔期间是最重要的因素。为学习一面模子墙的温度分发,模子的一台模仿的仪器被设计,实验被它执行。测量结果显示模子墙温度接近温度凉爽水。一个相等的热传导性的系数根据实验的结论被建议并且推出。这个系数被使用解决在 melt 和冷却水之间的热转移,并且描绘模子的热转移能力。由这个相等的热传导性的系数,数字地模仿连续的扔的团结过程很容易、方便。并且计算结果与实验一致。在模子温度上扔速度和水流动率的效果回答也被讨论。 | X.S. Zheng M.H. Sha J.Z. Jin | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，3： | 5 |
| 5 | A NOVEL PARAMETER FOR EVALUATING THE FATIGUE CRACK GROWTH RATE IN CARBON STEELS显示文摘A novel parameter is suggested for evaluating the fatigue crack growth rate in carbon steels. Fatigue crack propagation tests of an annealed O.42% carbon steel were carried out under different conditions to investigate the relationship between this dominating parameter and the crack opening displacement (COD). A new equation of fatigue crack growth rate is formulated in terms of the suggested parameter. The physical meanings of the material parameters in this equation are explored experimentally. Considering the relation of crack growth and deformation properties, a simple and applicable method is proposed to evaluate the fatigue crack growth rate. It is also observed that the material parameters in the fatigue crack growth rate equation of carbon steels are related linearly to the material strength. The results are in a good agreement with experimental results. | X.S. Wang1), S.Q. Zhn1), N. Kawagoishi2) and H. Nisitani3) 1) Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China 2) Faculty of Engineering, Kagoshima University, Kagoshima, 890-0065, Japan | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，4： | 5 |
| 6 | DOUBLE GLOW PLASMA SURFACE ALLOYING OF Ti6A14V AND TiAl显示文摘In order to improve the wear resistance of titanium alloy Ti6Al4V and high temperature oxidation resistance of intermetallic compound TiA1, the Double Glow Plasma Surface Alloying Technique (DG technique) was applied to modify the surface properties of these materials. Mo, Nb, Cr, Ni were diffused into the substrate materials to form alloyed layers with different properties. This paper shows the microstructures, microstructures, distributions of the alloy elements of the alloyed layers. Wear and high temperature oxidation tests were carried out. The test results indicate that the wear resistance of Ti6Al4V and the high temperature oxidation resistance of TiAl were improved significantly. | Z.Xu, L. Qin, B. Tang and Z. Y. He Research Institute of Surface Engineering, Taiyuan University of Technology, Taiyuan 030024, China X.S. Xie and C.L. Zheng School of Materials Science and Engineering, University of Science and Technology Beijing, Beiji | 2002 | Acta Metallurgica Sinica(English Letters)2002，15，2： | 4 |
| 7 | STUDY OF THE EFFECT OF BORON CONTENT ON THE ORDERED EXTENT OF THE Ni_3Al INTERMETALLICS COMPOUND BY AP-FIM显示文摘By using AP-FIM the varity of the ordered degree of Ni3Al with L12 structure with B content was studied. The possibility of boron improving ductility was also discussed from bonding between Ni and Al atoms, and antisite defects in Ni3Al. The extent of ordering is reduced with an increase in boron content and the autisite defects are most obvious for 0.52at.K B-doped sample that has the best ductility. Some results were verified by X-ray diffraction non. The addition of boron not only influences electron environment at grain boundary but also in the interior of Ni3Al gm ins, the latter is favorable to improve the ductility of Ni3Al grains. | D.G. Ren Z.Q. Li X.S. Fan and J. T. Guo Laboratory of Atomic Imaging of Solids, Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110015, China | 2000 | Acta Metallurgica Sinica(English Letters)2000，13，4： | 3 |
| 8 | Geographical origin identification of propolis using GC–MS and electronic nose combined with principal component analysis显示文摘 | H. Cheng Z.H. Qin X.F. Guo X.S. Hu J.H. Wu | 2013 | Food Research International2013，，2： | 2 |
| 9 | STUDY ON GREY FORECASTING MODEL OF COPPER EXTRACTION RATE WITH BIOLEACHING OF PRIMARY SULFIDE ORE显示文摘A model GM(grey model)(1,1) for forecasting the rate of copper extraction during the bioleaching of primary sulphide ore was established on the basis of the mathematical theory and the modeling process of grey system theory. It was used for forecasting the rate of copper extraction from the primary sulfide ore during a laboratory microbial column leaching experiment. The precision of the forecasted results were examined and modified via 'posterior variance examination'. The results show that the forecasted values coincide with the experimental values. GM(1,1) model has high forecast accuracy;and it is suitable for simulation control and prediction analysis of the original data series of the processes that have grey characteristics,such as mining,metallurgical and mineral processing,etc. The leaching rate of such copper sulphide ore is low. The grey forecasting result indicates that the rate of copper extraction is approximately 20% even after leaching for six months. | A.X. Wu Y. Xi B.H. Yang X.S. Chen H.C. Jiang | 2007 | Acta Metallurgica Sinica(English Letters)2007，20，2： | 2 |
| 10 | HIGH TEMPERATURE CRACK PROPAGATION AND FRACTURE OF SUPERALLOYS显示文摘1.IntroductionHighspeedrotatingdisksareconsideredasmostimportanthotcomponentsforturbochargers,expanders,compressors,landba... | X.S. Xie, Z.C. Xu and J.X. Dong High Temperature Materials Research Laboratory,University of Science and Technology Beijing,Beijing 100083, China | 1999 | Acta Metallurgica Sinica(English Letters)1999，12，1： | 2 |
| 11 | The influence of important factors on ultrafiltration of oil/water emulsion using PVDF membrane modified by nano-sized TiO 2 /Al 2 O 3显示文摘 | X.S. Yi S.L. Yu W.X. Shi N. Sun L.M. Jin S. Wang B. Zhang C. Ma L.P. Sun | 2011 | Desalination2011，，： | 1 |
| 12 | The false promises of coal exploitation: How mining affects herdsmen well-being in the grassland ecosystems of Inner Mongolia显示文摘 | G.S. Dai S. Ulgiati Y.S. Zhang B.H. Yu M.Y. Kang Y. Jin X.B. Dong X.S. Zhang | 2013 | Energy Policy2013，，： | 1 |
| 13 | Carbon-nanotube-modified glassy carbon electrode for simultaneous determination of dopamine, ascorbic acid and uric acid: The effect of functional groups显示文摘 | Huaqing Bi Yanhui Li Shufeng Liu Peizhi Guo Zhongbin Wei Chunxiao Lv Jizhen Zhang X.S. Zhao | 2012 | Sensors & Actuators: B Chemical2012，，： | 1 |
| 14 | Weak and strong singularities reflecting multiscale damage: Micro-boundary conditions for free–free, fixed–fixed and free–fixed constraints显示文摘 | X.S. Tang G.C. Sih | 2005 | Theoretical and Applied Fracture Mechanics2005，，1： | 1 |
| 15 | Comparative study of anion polyacrylamide (APAM) adsorption-related fouling of a PVDF UF membrane and a modified PVDF UF membrane显示文摘 | X.S. Yi W.X. Shi S.L. Yu N. Sun L.M. Jin S. Wang B. Zhang C. Ma L.P. Sun | 2011 | Desalination2011，，： | 1 |
| 16 | Isotherm and kinetic behavior of adsorption of anion polyacrylamide (APAM) from aqueous solution using two kinds of PVDF UF membranes显示文摘 | X.S. Yi W.X. Shi S.L. Yu Y. Wang N. Sun L.M. Jin S. Wang | 2011 | Journal of Hazardous Materials2011，，1： | 1 |
| 17 | Simulation study on function mechanism of some precipitates in localized corrosion of Al alloys显示文摘 | J.F. Li Z.Q. Zheng S.C. Li W.J. Chen W.D. Ren X.S. Zhao | 2006 | Corrosion Science2006，，6： | 1 |
| 18 | Micromechanics-based progressive failure analysis of fibre-reinforced composites with non-iterative element-failure method显示文摘 | X.S. Sun V.B.C. Tan T.E. Tay | 2010 | Computers and Structures2010，，11： | 1 |
| 19 | Large-scale synthesis of ZnO nanowires using a low-temperature chemical route and their photoluminescence properties显示文摘 | B.Y. Geng T. Xie X.S. Peng Y. Lin X.Y. Yuan G.W. Meng L.D. Zhang | 2003 | Applied Physics A Materials Science & Processing (-)2003，，3： | 1 |
| 20 | Modelling of hysteresis response for arbitrary wetting/drying paths显示文摘 | X.S. Li | 2005 | Computers and Geotechnics2005，，2： | 1 |
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