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Effect of cooling rate on microstructure and compressive performance of AZ91 magnesium alloy YANG Lin(杨 林), FENG Hui(冯 辉), QIU Ke-qiang(邱克强), CHEN Li-jia(陈立佳), LIU Zheng(刘 正) School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110023, China Received 28 July 2006; accepted 15 September 2006 Abstract: Effect of cooling rate on both microstructure and room......
; directions have the fastest growth velocity, so that Mg2Si particles are likely to form octahedron shape. When gradually increasing the Mg content, the distributions of Mg and Si atoms on the solid... from the octahedron shape into various complex structures with a large size. Key words: hypereutectic Al-Si alloys; primary Mg2Si particles; growth pattern; growth velocity 1 Introduction Hypereutectic......
3D Printing Engineered Multi-porous Cu Microelectrodes with In Situ Electro-Oxidation Growth of CuO Nanosheets for Long Cycle,High Capacity and Large Rate SupercapacitorsTao Liu,Yuejiao Chen,Libao... and large rate has been challenged.3 D printing is an additive manufacture technique that has been explored to construct microelectrodes of arbitrary geometries for high-energy–density......
the tendency to grow slower than big voids[9]. The void growth and interaction in FCC copper crystals were studied by employing a rate- dependent formulation of crystal plasticity[10], and the study.... Simulation of void growth and coalescence behavior with 3D crystal plasticity theory[J]. Comput Mater Sci, 2007, 40(1): 130-139. [17] ANAND L, KOTHARI M. A computational procedure for rate-independent......
凝固速率跃迁对定向凝固Al-40%Cu过共晶合金初生Al2Cu相的影响全琼蕊1,李双明1,傅恒志1(1.陕西省西安市西北工业大学凝固技术国家重点实验室)摘 要:采用高温度梯度定向凝固装置进行了Al-40%Cu(质量分数)过共晶合金的定向凝固实验,研究了凝固速率跃迁过程中的凝固组织演变.结果表明,当定向凝固速率从10μm/s跃迁减速到2μm/s时,由于固/液界面附近的液相成分向共晶点成分变化以及耦合共晶组织的界面生长温度高于初生Al2Cu相的界面生长温度,合金凝固组织从初生Al2Cu枝晶和Al/Al2Cu共晶组织......
at 800℃ for 2 h. The small grain growth exponents indicate how easy the grain growth in these materials sintered using microwave radiation. Grain growth rate increases abruptly and is higher than... to that of conventional sintering process,due to fast increase in grain growth rate and homogeneity in the specimen. The results indicate lower sintering energy and reduction of PbO pollution in the working......
200030,China) Abstract:A three dimensional rate-dependent crystal plasticity model is applied to study the influence of crystal orientation and grain boundary on the void growth and coales- cence. The 3D... that crystallographic orientation has noticeable influences on the void growth directionvoid shape, and void coalescence of single crystal. The void growth rate of bicrystals depends on the crystallographic......
显微组织对TC4ELI合金疲劳裂纹扩展路径及扩展速率的影响马英杰1,李晋炜1,雷家峰1,唐振云2,刘羽寅1,杨锐2(1.辽宁省沈阳市科学院金属研究所2.中航工业北京航空制造工程研究所)摘 要:利用SEM观察了疲劳裂纹在具有片层组织的TC4ELI合金中的扩展路径,通过统计疲劳裂纹与α片层所呈的角度,分析了α和β两相晶体学取向对疲劳裂纹扩展路径的影响.基于对疲劳裂纹扩展路径的研究,测试并讨论了片层组织中晶粒和α片层对近门槛值阶段及Paris区阶段疲劳裂纹扩展速率的影响.研究表明,疲劳裂纹在片层组织中扩展时,疲劳裂纹......
generated by microcrack growth decrease with the increase of loading rates. Meanwhile, the turning point of cumulative counting moves forward as the loading rate increases, which shows that the AE signal... J. Cent. South Univ. (2020) 27: 3118-3132 DOI: https://doi.org/10.1007/s11771-020-4533-5 Effect of loading rate on fracture behaviors of shale under mode I loading XIE Qin(谢秦)1, LI Sheng-xiang(李生相......
">The microstructure evolution and growth orientation of directionally solidified Mg–4 wt%Zn alloy in the growth rate range from 20 to 200 lm/s were investigated.A typical cellular structure was observed with a growth rate of 20 lm/s,and the cellular spacing was 115 lm.When the growth rate increased to 60 lm/s,cellular structure with some developed perturbations was obtained and the cellular spacing......
