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| 1 | LASER LIFT-OFF OF GaN THIN FILMS FROM SAPPHIRE SUBSTRATES显示文摘Gallium Nitride film was successfully separated from sapphire substrate by laser radiation. The absorption of the 248nm radiation by the GaN at the interface results in rapid thermal decomposition of the interfacial layer, yielding metallic Ga and N2 gas. The substrate can be easily removed by heating above the Ga melting point (29℃). X-ray diffraction, atomic force microscopy and Photoluminescence of CaN before and after lift-off process have been performed, which demonstrated that the separation and transfer process do not alter the structural quality of the GaN films. And further discussions on the threshold energy and crack-free strategies of laser lift-off process have also been presented. | J. Xu, R. Zhang, Y.P. Wang, X.Q. Xiu, S.L. Gu, B. Shen, Y. Shi, Z.G. Liu and Y.D. Zheng (Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China) | 2001 | Acta Metallurgica Sinica(English Letters)2001，14，6： | 10 |
| 2 | FE SIMULATION OF CENTER CRACK OCCURRENCE IN TUBE ROUNDS DURING TWO-ROLL ROTARY ROLLING PROCESS显示文摘With the aid of FE (finite element) code MSC.Superform 2005, 2-D coupled thermo-mechanical simulation of center-crack occurrence in round billet during 2-roll rotary rolling process was presented using Oyane ductile fracture criteria. A simple modeling is put forward based on the spiral motion of the workpiece as an essential characteristic in movement. The influence of the feed angle and the entry cone angle of the main roll on the process was taken into account in the modeling. The soundness for simplifying the 3-D rotary rolling into a 2-D problem was discussed. By adopting the parameters of Diescher piercer in 140mm mandrel mill of Bao Steel, the distribution and development of strain / stress were analyzed, and the eigen value of ductile fracture as well. The critical percentage of diameter reduction was obtained from the simulation. The result showed a good agreement with the experimental value, and therefore was of widely guiding significance to the practical process for rationally formulating the deformation parameters of steel tube piercing. | S.Z. Li J. Xu Y.D. Yin J.G. Xue F. Pan J.M. Zheng J.H. Yoon | 2007 | Acta Metallurgica Sinica(English Letters)2007，20，3： | 7 |
| 3 | Superelasticity and Tunable Thermal Expansion across a Wide Temperature Range显示文摘Materials that undergo a reversible change of crystal structure through martensitic transformation(MT)possess unusual functionalities including shape memory, superelasticity, and low/negative thermal expansion. These properties have many advanced applications, such as actuators, sensors, and energy conversion, but are limited typically in a narrow temperature range of tens of Kelvin. Here we report that, by creating a nano-scale concentration modulation via phase separation, the MT can be rendered continuous by an in-situ elastic confinement mechanism. Through a model titanium alloy, we demonstrate that the elastically confined continuous MT has unprecedented properties, such as superelasticity from below 4.2 K to 500 K, fully tunable and stable thermal expansion, from positive, through zero, to negative, from below 4.2 K to 573 K, and high strength-to-modulus ratio across a wide temperature range.The elastic tuning on the MT, together with a significant extension of the crystal stability limit, provides new opportunities to explore advanced materials. | Y.L. Hao H.L. Wang T. Li J.M. Cairney A.V. Ceguerra Y.D. Wang Y. Wang D. Wang E.G. Obbard S.J. Li R. Yang | 2016 | Journal of Materials Science & Technology2016，32，8： | 6 |
| 4 | SIMULATION OF VIBRATION STRESS RELIEF AFTER WELDING BASED ON FEM显示文摘一个有限元素模型在 welding.For 以后为颤动压力地势( VSR )的模拟被开发 nonresonant 颤动,在应力的减小强烈取决于 vibration.For 的振幅反响的颤动,颤动频率是钥匙因为压力 relief.The 颤动频率应该为需要的颤动接近结构天赋频率 mode.Only 小的颤动振幅被要求,它将在时间没有的 vibration.Vibration 期间被放大主要 | X.C. Zhao Y.D. Zhang H.W. Zhang Q. Wu | 2008 | Acta Metallurgica Sinica(English Letters)2008，21，4： | 6 |
| 5 | 回转筒颗粒表面流的分子动力学模拟和连续理论显示文摘在考虑颗粒非弹性接触、滑动摩擦和滚动摩擦基础上发展了分子动力学模拟的算法,实现了中高速(Fr=0.1~0.2)回转筒内颗粒流的离散模拟.回转筒内颗粒流由表面活性层和下部柱塞流区组成,颗粒在活性层的停留时间约为柱塞流区的1/3~1/2,对称线上活性层和柱塞流区的厚度比为0.57~0.61,因而推断颗粒流动处于Rolling-Cascading过渡模式.对称线上MD模拟的速度分布与正电子放射性测量实验结果十分吻合.在模拟和实验结果基础上发展了连续理论:柱塞流区内颗粒运动并非完全随着筒壁刚体转动,而是存在着塑性蠕变,这种速度变化过程符合指数函数规律;而活性层内颗粒流动则符合简单的Couette切变流动分布.最后探讨了颗粒温度和颗粒相对浓度分布的内在机理. | 李水清 姚强 陈冰 张宣 Ding Y.D. | 2006 | 科学通报2006，51，19： | 3 |
| 6 | OXIDATION RESISTANCE OF NANOCRYSTAL ODS ALUMINIDE COATINGS PRODUCED BY PACK ALUMINIZING PROCESS ASSISTED BY BALL PEENING显示文摘Nanocrystal ODS (加强的氧化物分散) aluminide 涂层被球 peening 帮助的包装 aluminizing 过程在不锈钢和基于镍的超级合金上生产。纯艾尔粉末并且 1% 极其细小的 Y 2 O 3 粉末被球 milling 混合。极其细小的 Y 2 O 3 粉末在艾尔粒子被驱散。球 peening 焊接了艾尔粒子到底层上并且加速了 aluminide 涂层的形成。Nanocrystal ODS aluminide 涂层被外面的生长在低温度生产(在 600 ° C 下面) 在一短处理时间。涂层的形成上的操作温度和处理时间的效果被分析。SEM (扫描电子显微镜) , AFM (原子力量显微镜) ,版本(精力散 X 光检查光谱学) , XRF (X 光检查荧光分光计) 和 XRD (X 光检查衍射) 方法被使用调查涂层的微观结构。高温度的氧化测试被执行评估 ODS aluminide 涂层的氧化抵抗。 | Z.L. Zhan Y.D. He W. Gao | 2006 | Acta Metallurgica Sinica(English Letters)2006，19，3： | 3 |
| 7 | <110> Fiber Texture Evolution of Ferrite Wires during Drawn-torsion and Drawn-annealing-torsion Process显示文摘In this paper, the texture and microstructure evolution of drawn-torsion and drawn-annealing-torsion ferrite wires are studied by electron back scattering diffraction (EBSD) in order to investigate the special torsion texture evolution. Compared to the simulation results, the stable texture components {110}< 110 > and {110}<112> in both drawn-torsion and drawn-annealing-torsion wires display different evolution processes. The texture of the drawn-annealing-torsion wire fits to the Taylor model. A special texture evolution is found in drawn-torsion wires, related to the grain shape, and the heterogeneous deformation. A new plastic deformation viewpoint is suggested based on the special microstructure of drawn ferrite wire. | Y.D. Liu Y.D. Zhang A. Tidul L. Zuo | 2012 | Journal of Materials Science & Technology2012，28，11： | 2 |
| 8 | Grain refinement of AZ91D magnesium alloy by SiC显示文摘 | T.J. Chen X.D. Jiang Y. Ma Y.D. Li Y. Hao | 2010 | Journal of Alloys and Compounds2010，，1： | 2 |
| 9 | Plant regeneration from hairy-root cultures transformed by infection with Agrobacterium rhizogenes in Catharanthus roseus显示文摘 | P.S. Choi Y.D. Kim K.M. Choi H.J. Chung D.W. Choi J.R. Liu | 2004 | Plant Cell Reports2004，，11： | 1 |
| 10 | Effect of nano-micro TiN addition on the microstructure and mechanical properties of TiC based cermets显示文摘 | N. Liu Y.D. Xu H. Li G.H. Li L.D. Zhang | 2002 | Journal of the European Ceramic Society2002，，13： | 1 |
| 11 | 查看详情显示文摘 | Wang X.D Zhou N.L Yuan J Wang W.Y. Tang Y.D. Lu C.Y. Zhang J. Shen J | | 0，，： | 1 |
| 12 | Network-shaped fine-grained microstructure and high ductility of magnesium alloy fabricated by cyclic extrusion compression显示文摘 | Y.J. Chen Q.D. Wang H.J. Roven M.P. Liu M. Karlsen Y.D. Yu J. Hjelen | 2007 | Scripta Materialia2007，，4： | 1 |
| 13 | Microstructure evolution and mechanical properties of TiB 2 /Cu composites processed by equal channel angular pressing at elevated temperature显示文摘 | G.S. Wang G.H. Fan L. Geng W. Hu Y.D. Huang | 2013 | Materials Science & Engineering A2013，，： | 1 |
| 14 | Enantioseparation of trans-stilbene oxide using a cellulose acetate membrane显示文摘 | M. Zhao X.L. Xu Y.D. Jiang | | 0，，01： | 1 |
| 15 | Microstructure and properties of mechanical attrition enhanced electroless Ni–P plating on magnesium alloy显示文摘 | Y.D. He H.F. Fu X.G. Li W. Gao | 2007 | Scripta Materialia2007，，6： | 1 |
| 16 | Effects of d.c. current on the phase transformation in 7050 alloy during homogenization显示文摘 | P.F. Jia Y.H. Cao Y.D. Geng L.Z. He N. Xiao J.Z. Cui | 2014 | Materials Characterization2014，，： | 1 |
| 17 | Numerical simulation of natural convection between two elliptical cylinders using DQ method显示文摘 | Y.D. Zhu C. Shu J. Qiu J. Tani | 2003 | International Journal of Heat and Mass Transfer2003，，4： | 1 |
| 18 | Anisotropy of dynamic behavior of extruded AZ31 magnesium alloy显示文摘 | G. Wan B.L. Wu Y.D. Zhang G.Y. Sha C. Esling | 2010 | Materials Science & Engineering A2010，，12： | 1 |
| 19 | Interface property of carbon fibers/epoxy resin composite improved by hydrogen peroxide in supercritical water显示文摘 | H. Guo Y.D. Huang L.H. Meng L. Liu D.P. Fan D.X. Liu | 2009 | Materials Letters2009，，17： | 1 |
| 20 | Predicting Fracture Toughness of TRIP 800 Using Phase Properties Characterized by In-Situ High-Energy X-Ray Diffraction显示文摘 | A. Soulami K.S. Choi W.N. Liu X. Sun M.A. Khaleel Y. Ren Y.D. Wang | 2010 | Metallurgical and Materials Transactions A2010，，5： | 1 |
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