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| 1 | Influence of Al-Ti-B addition on the microstructure and mechanical properties of A356 alloys显示文摘The mechanical properties (σb,σ0.2,and δ) and fracture behavior of tensile specimens of the refined A356 alloys were investigated as a function of the addition level of Al-Ti-B master alloy under both as-cast and T6 heat-treated conditions. The results show that as the addition level of Al-5Ti-1B master alloy increases from 0.1 wt.% to 5.0 wt.%,the mechanical properties of refined A356 alloys improve steadily and then decrease slightly under both as-cast and T6 heat-treated conditions. Also,they display excellent mechanical properties with σb = 231.30-258.30 MPa,σ0.2 =134.00-155.50 MPa,and δ = 8.5%-11.75% at T6 heat-treated state. The excellent mechanical properties of refined A356 alloys are ascribed to the formation of α-Al equiaxed dendrites,the improvement of eutectic structure from needle/plate-like to short-lathy/block-shaped,and the Mg2Si aging precipitation phase after T6 heat treatment. The fracture surface examined by SEM exhibits a mixed fracture mode of refined A356 alloys at as-cast state,while it reveals a ductile fracture mode after T6 heat treatment. | Zhu Man Yang Gencang Yao Lijuan Cheng Suling Zhou Yaohe | 2009 | Rare Metals2009，28，2： | 11 |
| 2 | Determination of interface width value in phase-field simulation of dendritic growth into undercooled melt显示文摘The influence of the interface width value on the simulation results and its dependence upon thermo-physical parameters in the phase-field simulation of dendritic growth into undercooled melt are investigated. After choosing the reasonable interface width value, the tip velocities of dendritic growth in Ni melt under different undercoolings are calculated and compared with the experimental data in order to benchmark our results. It is shown that the reasonable interface width value, which is determined by the undercooling, anisotropy, interface kinetic, and thermal diffusivity, has to be taken low enough, and the agreement of our results with experimental data verifies that the credible results can be achieved as long as the interface width value is adequately low. This paper provides the basis of determining interface width value in simulating dendritic growth into undercooled melt by phase-field approach. | YU Yanmei, YANG Gencang , ZHAO Dawen and LU Yili(State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China) | 2002 | Progress in Natural Science:Materials International2002，12，3： | 8 |
| 3 | Liquid-phase Separation in Rapid Solidification of Undercooled Fe-Co-Cu Melts显示文摘The homogeneous liquid was separated into two phases,(Fe,Co)-rich L1 and Cu-rich L2,once the melt was undercooled below a liquid-phase separation temperature T sep.If the duration from T sep to T s1(solidification temperature of L1 phase),termed the liquid-phase separation interval t,exceeded a critical value,an egg-type structure was observed.By utilizing differential thermal analyses(DTA),the solidification process of the undercooled Fe-Co-Cu alloys was studied.Additionally,an immiscible boundary was obtained,which was a convex parabola with a symmetrical axis of x Cu =0.52.Depending on the relative amounts of L1 and L2,the minor phase was nucleated firstly to form liquid droplets and separated from the original liquids at the beginning of liquid-phase separation. | Ning Liu Feng Liu Zheng Chen Gencang Yang Changlin Yang Yaohe Zhou | 2012 | Journal of Materials Science & Technology2012，28，7： | 7 |
| 4 | INFLUENCE OF Al-5Ti-1B MASTER ALLOY ON MICROSTRUCTURE AND DAMPING CAPACITY OF ZA27 ALLOY显示文摘1INTRODUCTIONThedampingcapacityofamaterialisameasureoftheenergythatisdissipatedinthematerialduringmechanicalvibrationundercyc... | Zhang, Zhongming Wang, Jincheng Lu, Yili Song, Guangsheng Yang, Gencang Zhou, Yaohe | 1998 | 中国有色金属学会会刊:英文版1998，8，3： | 5 |
| 5 | Precipitation and responding damping behavior of heat-treated AZ31 magnesium alloy显示文摘Microstructure observation and dynamic mechanical analysis were carried out to in- vestigate the precipitation and responding damping behaviors of AZ31 magnesium alloy. All the strain amplitude-dependent damping curves of the aged alloys are located between the curves of solutionized and as-cast alloys, although they have different critical strain amplitudes. The G-L theory is employed to explain the damp- ing mechanism involving the interaction between the dislocation and the precipitated phase. In addition, a damping peak is observed at temperatures close to 330 °C for AZ31 magnesium alloy, which is related to the β-Mg17Al12 phase dissolution. | Diqing WAN Jincheng WANG Gaifang WANG Lin LIN Zhigang FENG Gencang YANG | 2009 | Acta Metallurgica Sinica(English Letters)2009，22，1： | 5 |
| 6 | Phase field simulation of the interface morphology evolution and its stability during directional solidification of binary alloys显示文摘The influences of pulling speed V and temperature gradient G on morphology evolution, concentration distribution, solute trapping and interface stability during directional solidification of binary alloys have been studied with the B-S phase field model. Simulated results reproduced the morphology transitions of deep cell to shallow cell and shallow cell to plane front. The primary cellular spacing, depth of groove and effective solute redistribution coefficient for different V and G are compared. The absolute stability under high pulling speed and high temperature gradient has also been predicted, which is in agreement with the Mullins-Sekerka (M-S) stability theory. | WANG JinCheng LI JunJie YANG YuJuan ZHANG YuXiang YANG GenCang | 2008 | Science China(Technological Sciences)2008，51，4： | 4 |
| 7 | Growth morphology and evolution of quasicrystal in as-solidified Y-rich Mg-Zn-Y ternary alloys显示文摘A petal-like icosahedral quasicrystal with five branches,which is considered to be the representative morphology of the icosahedral quasicrystal,has been observed in the Y-rich Mg-Zn-Y ternary alloys. Moreover,the polygon-like mor-phology,another pattern of the icosahedral quasicrystal,has also been found in the Y-rich Mg-Zn-Y ternary alloys. The latter morphology results from the evolution of the former one. The growth mechanism of the petal-like morphology of the ico-sahedral quasicrystal was also discussed. Alloying composition,i.e.,Y element content,is a major factor inducing the mor-phology evolution of the icosahedral quasicrystal. | WAN Diqing YANG Gencang CHEN Sulin ZHU Man ZHOU Yaohe | 2007 | Rare Metals2007，26，5： | 4 |
| 8 | Phase selection during solidification of undercooled Ni_(70.2)Si_(29.8) eutectic alloy显示文摘在冷却下面的高度(大约 392 K ) 在体积被完成最容易溶解的 Ni 70.2 Si 29.8 合金通过与周期的过热相结合的玻璃 fluxing 融化。这被发现亚稳的阶段 Ni 3 Si 2 并且非最后被获得通过慢团结以后什么时候在冷却下面超过 240 K。亚稳的阶段被使用 X 光检查衍射和微分扫描热量测定(DSC ) 的方法证实。基于免费精力最小和短暂成核理论的原则,阶段选择融化在凉下来的最容易溶解的 Ni 70.2 Si 29.8 融化。从在凉下来的 Ni 70.2 Si 29.8 融化被归功于到竞争成核与在冷却下面,即在冷却下面的高度便于亚稳的阶段的优先的成核。 | Yiping Lu Tingju Li Fu Yabo Sun Jianbo LUO Dawei Gencang Yang Yaohe Zhou | 2009 | Progress in Natural Science:Materials International2009，19，11： | 4 |
| 9 | Solidification Structure Formation of Undercooled Single Phase Alloys显示文摘Solidification structure variation of single phase alloy with undercooling prior to nucleation has been widely studied.The progress, especially during the last decade, is reviewed so as to give a comprehensive knowledge for it, in which the emphases are laid on the structure evolution mechanism and the potential application. Lastly, the future interesting subjects are presented. | Jinfu LI Yaohe ZHOU Wanqi JIE Gencang YANG | 2002 | Journal of Materials Science & Technology2002，18，4： | 3 |
| 10 | Phase field modeling for dendritic morphology transition and micro-segregation in multi-component alloys显示文摘By using the phase field model for the solidification of multi-component alloys and coupling with real thermodynamic data, the dendritic morphology transition and the dendritic micro-segregation of Ni-Al-Nb ternary alloys are simulated in two cases, i.e., varying the alloy composition at a fixed under-cooling and varying the undercooling at a fixed alloy composition. The simulated results indicate that with the increase of the dimensionless undercooling U (U=ΔT/ΔT0, where ΔT is the undercooling and ΔT0 the temperature interval between the solidus and liquidus), the dendritic morphology transfers from dendritic to globular growth in both cases. As to the dendritic micro-segregation, both cases present a regularity of increasing at first and then decreasing. | WANG JinCheng ZHANG YuXiang YANG YuJuan LI JunJie YANG GenCang | 2009 | Science China(Technological Sciences)2009，52，2： | 3 |
| 11 | Phase-selection and metastable phase formation in highly undercooled eutectic Ni_(78.6)Si_(21.4)alloys显示文摘在冷却下面大的 A (250 K ) 在最容易溶解的 Ni 78.6 Si 21.4 由熔融眼镜的 denucleation 并且周期的过热的联合融化。在在凉下来的最容易溶解的 Ni 78.6 Si 21.4 融化被调查。随增加在冷却下面,在最容易溶解的 Ni 78.6 Si 21.4 融化并且这些亚稳的阶段的部分能在房间温度被保留通过慢团结以后。在下面在冷却,亚稳的阶段 b2-Ni3Si, Ni31Si12 和 Ni3Si2 下面大被识别。特别, Ni3Si2 阶段在最容易溶解的 Ni 78.6 Si 21.4 合金第一次。基于最小的免费精力和短暂 uncleation 理论的原则,团结行为融化关于亚稳的阶段形成被分析 melts 什么时候高度在在下面,使状态凉下来。 | LU Yiping YANG Gencang YANG Changlin WANG Haipeng ZHOU Yaohe | 2006 | Progress in Natural Science:Materials International2006，16，3： | 3 |
| 12 | Influence of RE Content on Damping Capacity of Alloy ZA27显示文摘Thedampingcapacityofmaterialsisameasureoftheenergythatisdisipatedinthematerialsduringmechanicalvibrationundercyclicloading.Th... | Zhang, Zhongming Wang, Jincheng Xu, Donghui Lu, Yili Yang, Gencang Zhou, Yaohe | 1999 | Journal of Rare Earths1999，17，2： | 3 |
| 13 | δ/γtransformation in non-equilibrium solidified peritectic Fe-Ni alloy显示文摘Through phase transformation kinetic analysis and experimental observation,the δ/γtransformation occurring in the non-equilibrium peritectic Fe-4.33at.%Ni alloys was systematically investigated.According to JMA solid-state transformation ki-netic theory,the Time-Temperature-Transformation(TTT)curves of the δ/γtrans-formation in peritectic Fe-Ni alloy were calculated.On this basis,the physical cor-relation between the δ/γtransformation and the initial undercooling of melt(T)was elucidated.The results indicate that the change of T can alter not only the overall δ/γtransformation pathways but also the transformation fraction with re-spect to each transformation mechanism. | CHEN YuZeng LIU Feng YANG GenCang LIU Ning ZHOU YaoHe | 2007 | Science China(Physics,Mechanics & Astronomy)2007，50，4： | 3 |
| 14 | CREEP CHARACTERISTICS OF HIGH SILICON ZA27 ALLOY PREPARED BY SPRAY DEPOSITION显示文摘CREEPCHARACTERISTICSOFHIGHSILICONZA27ALLOYPREPAREDBYSPRAYDEPOSITIONYangLiushuan;LiuYongchang;YangGencang;ZhouYaohe(StateKeyLa... | Yang Liushuan Liu Yongchang Yang Gencang Zhou Yaohe(State Key Laboratory of Solidification Processing,Northwestern Polytechnic University, Xi’an, 710072) | 1996 | 中国有色金属学会会刊:英文版1996，6，2： | 2 |
| 15 | Growth of decagonal quasicrystal phase in laser resolidified Al_(72)Ni_(12)Co_(16)显示文摘An ultra-high temperature gradient directional solidification process produced by a widened laser beam was adopted to achieve the directionally solidified microstructure of the stable decagonal quasicrystal phase in AI72Ni12Co16 alloy. X-ray, SEM, TEM and optical microscopy techniques were used to investigate the microstructures and identify the phase. The directionally solidified decagonal quasicrystal showed the facet morphology and grew in lateral growth mode. The unusual periodic and quasiperiodic atomic structures of the decagonal quasicrystal and the epitaxial growth in the melt pool were considered to be the key factors influencing the growth morphology. The experimental results were consistent with the Toner’s theoretical atomistic growth model. | LIU Yongchang, YANG Gencang, LIU Xinbao & ZHOU YaoheState Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072. China | 2000 | Chinese Science Bulletin2000，45，14： | 2 |
| 16 | Entropy as a selection rule for crystal growth in undercooled binary eutectic melts显示文摘A solution entropy model was developed for the undercooled binary eutectic alloy systems. As an ex-tension of Taylor and Fidler et al.'s model, the present model considered the change of phase compo-sition with the increase of undercooling. Furthermore, the sub-regular solution model and the interac-tion parameter (IAB) were also introduced. In this paper, the extended model is used to calculate the solution entropy for binary eutectic phases under the undercooled condition, and the application scope of the model is also extended. Not only the growth manner of eutectic phases, but also the transition of morphologies may be predicted and explained by calculating the solution entropy of eutectic phases under the non-equilibrium condition with the developed model. Experimental results show that the developed model is valid for the undercooled Ni-Si and Ni-Sn eutectic alloy systems. | LU YiPing XI ZengZhe YANG GenCang LIN Xin ZHOU YaoHe | 2009 | Chinese Science Bulletin2009，54，6： | 2 |
| 17 | Effects of T6 heat treatment on the microstructure, tensile properties, and fracture behavior of the modified A356 alloys显示文摘 | Man Zhu Zengyun Jian Gencang Yang Yaohe Zhou | 2011 | Materials and Design2011，，： | 2 |
| 18 | INFLUENCE OF CERIUM CONTENT ON DAMPING CAPACITIES OF AS-SPRAY DEPOSITED HIGH SILICON ALLOY ZA27显示文摘INFLUENCEOFCERIUMCONTENTONDAMPINGCAPACITIESOFASSPRAYDEPOSITEDHIGHSILICONALLOYZA27①LiuYongchang,LuYili,YangGencang,ZhuZhengan... | Liu, Yongchang Lu, Yili Yang, Gencang Zhu, Zhengang | 1997 | 中国有色金属学会会刊:英文版1997，7，1： | 2 |
| 19 | GRAIN REFINEMENT IN BULK UNDERCOOLED Ni-BASED ALLOY显示文摘Fluxing of 5 g bulk melt Ni77Si13B10 permits high undercoolings to be attained prior to nu-cleation onset.Investigations of grain refinement in the bulk undercooled alloy as a function ofundercooling,recalescence behavior and cooling rate have been reported.A significant inhomo-geneity of reduction in grain size of a bulk sample is observed,which is caused by the different so-lidification conditions:(1)recalescence process,and(2)the followed plateau in which the heatrelease and extraction rates are equal.It is concluded that the homogeneous refined microstructurecan be achieved if the initial undercooling prior to nucleation,or cooling rate after recalescence isfurther increased. | Li,Delin Yang,Gencang Zhou,Yaohe Northwestern Polytechnical University,Xi’an 710072,China | 1993 | 中国有色金属学会会刊:英文版1993，3，4： | 2 |
| 20 | FRICTION-WEAR PROPERTY OF HIGH SILICON ZA27 ALLOY PREPARED BY SPRAY DEPOSITION显示文摘FRICTION-WEARPROPERTYOFHIGHSILICONZA27ALLOYPREPAREDBYSPRAYDEPOSITION￥YangLiushuan;LiuYongchang;YangGencang;ZhouYaohe(StateKey... | Yang Liushuan Liu Yongchang Yang Gencang Zhou Yaohe (State Key Laboratory of Solidification Processing,Northwestern Polytechnic University,Xi’an 710072) | 1996 | 中国有色金属学会会刊:英文版1996，6，4： | 2 |
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