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| 1 | Reducing the tension-compression yield asymmetry of extruded Mg-Zn-Ca alloy via equal channel angular pressing显示文摘The influence of equal channel angular pressing on the tension-compression yield asymmetry of extruded Mg-5.3 Zn-0.6 Ca(weight percent)alloy has been investigated.The microstructure was obviously refined by the large strain during the equal channel angular pressing,accompanied with very fine Ca_(2)Mg_(6)Zn_(3) phases with average diameter of 70 nm.The weak tension-compression yield asymmetry after equal channel angular pressing is mainly attributed to the reduced volume fraction of extension twinning during the compression,because the slope(k)of twinning in Hall-Petch relationship is higher than that of dislocation slip,and the twinning deformation is difficult to take place with decreasing grain size.The basal slip is more active in the alloy after equal channel angular pressing,due to the non-basal texture components,which hinders the twinning activation and reduces the yield asymmetry.Furthermore,the presence of fine precipitate restricts the twinning activation,which also contributes to the reduction of yield asymmetry. | L.B.Tong M.Y.Zheng S.Kamado D.P.Zhang J.Meng L.R.Cheng H.J.Zhang | 2015 | Journal of Magnesium and Alloys2015，3，4： | 5 |
| 2 | 梳理的动态特性——纤维在梳理中运动及分布的研究综述显示文摘 | J.Meng 徐军 | 2002 | 国外纺织技术(纺织针织服装化纤染整)2002，，4： | 4 |
| 3 | Recent advances in Hepatitis E Virus显示文摘 | X. J.Meng | 2010 | Journal of Viral Hepatitis2010，，3： | 1 |
| 4 | Recent advances in Hepatitis E Virus显示文摘 | X. J.Meng | 2010 | Journal of Viral Hepatitis2010，，3： | 1 |
| 5 | Effects of rejuvenation heat treatment on microstructure and creep property of a Ni-based single crystal superalloy显示文摘Both surface and internal microstructures of a second-generation Ni-based single crystal(SX) superalloy were studied after creep and rejuvenation heat treatment(RHT).It is indicated that the microstructures,such as the dislocation network,the γ phase and the γ' phase,can be recovered to those after the standard heat treatment(SHT).It is found that RHT affected zone(RAZ) formed at the surface is composed of theγ'-free layer,the transition layer and the recrystallization(RX),which are less than 20 μm in depth totally.Such depth of the RAZ doesn't affect the properties of the superalloy.The morphology of γ' phase at the RAZ is related to the composition of the elements.The average creep life after RHT is close to the average life after SHT.It is concluded that RHT could effectively repair SX parts and increase the total life of the sample after a damage by creep. | K.J.Tan X.G.Wang J.J.Liang J.Meng Y.Z.Zhou X.F.Sun | 2021 | Journal of Materials Science & Technology2021，，1： | 0 |
| 6 | SOME SINGULAR SINGULARLY-PERTURBED PROBLEMS (1)显示文摘In this paper, we study some singular singularly-perturbed boundary-value problem Pε consisting of the differential equations and the boundary conditions where t ∈ [0, 1], 0 <ε ≤ ε0. U, V, H1 and H2 are scalar functions and infinitely differentiable with respect to their variables respectively.Our approach is somewhat similar to those of Chang [2], Shi [6] and Smith [7]. Our main result (Theorem 4) is new and extends the result, in the scalar case, of Shi [6], who dealt with the problem (1) with V(t, x, ε2y, ε) in place of V(t, x, εy, ε). An application of our result is given at the end. | K.W.Chang & J.Meng(Dept. of Math. and Statistics, University of Calgary, Canada T2N 1N4) | 1999 | Annals of Differential Equations1999，15，3： | 0 |
| 7 | 控制芸苔油菜种子硫苷含量的位点及其与黑盘菌抗性间的关系显示文摘以前鉴定了H5200和Ning RS-1杂交中与黑盘菌(Sclerotinia sclerotiorum)抗性相关的位点,发现有6个位点在不同的发育阶段和不同的器官中与黑盘菌抗性有关。本文将介绍硫苷及其各种成分的叽绘图结果以及种子特定硫苷含量与抗病性间的关系。 | J.Zhao J.Meng 谢国禄 | 2004 | 国外作物育种2004，23，1： | 0 |
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