共搜索到16935条信息,每页显示10条信息,共1694页。用时:0小时0分1秒296毫秒
......
Article ID: 1003-6326(2005)03-0479-06 Simulation of nucleation and coalescence of second phase droplets during earth-based solidification process of immiscible alloys Received... on the nucleation, diffusional growth, especially the coalescence of the second phase droplets in the miscibility gap. A numerical model based on the discrete multi-particle approach was developed......
......
Eutectic nucleation in Al-7 wt pct Si-Mg casting alloysZhongwei CHEN , Cuiying MA and Jing ZHAO State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi an 710072, China摘 要:The nucleation of eutectic crystals of hypoeutectic Al-7 wt pct Si-Mg casting alloys modified by Ce and Sr was studied by using differential......
in the seismic source mechanism. A method of locating areas with hazardous seismicity and a conceptual model of hazardous seismic nucleation in DCM were proposed. A criterion of rockburst prediction... mechanism and models of seismicity in mines focused mainly on rock structure such as faults and local stopes or tunnels [7-9], and there were few researches on the mechanism of the areal seismic nucleation......
behavior for a wide range of metals and alloys[1-4]. It mainly focused on the cavity nucleation mechanism during superplastic deformation using hot tension tests[5-6]. In superplastically formed parts... Cavity nucleation during hot forging of Ti-6Al-2Zr-1Mo-1V alloy with colony alpha microstructure DONG Xian-juan(董显娟)1, 2, LU Shi-qiang(鲁世强)1, ZHENG Hai-zhong(郑海忠)1, LI Xin (李 鑫)1, OUYANG De-lai......
Solidification microstructures and mechanism of grain refinement of electrolytic low titanium Al alloys WANG Ai-qin(王爱琴)1, 2, XIE Jing-pei(谢敬佩)2, LI Ji-wen(李继文)2, LIU Zhong-xia(刘忠侠)1, WANG... University of Science and Technology, Luoyang 471003, China Received 28 July 2006; accepted 15 September 2006 Abstract: The solidification microstructures and the mechanism of grain refinement......
. The main nucleation mechanism of DRX in the present alloy is grain boundary bowing nucleation and the other nucleation mechanism is twin superposition nucleation. The DRX modeling of this alloy is established by means of mathematic fitting data based on true stress-true strain curves. Key words: GH4742 superalloy; dynamical recrystallization; hot compression; nucleation mechanism GH4742 合金是我国首次仿制俄罗斯......
the crystallization temperature. Furthermore, the results indicated that the nucleation and crystallization mechanism of the hybrid microwave heating process slightly differs from...Nucleation and crystallization of tailing-based glass-ceramics by microwave heatingBao-wei Li1,2,Hong-xia Li1,Xue-feng Zhang3,Xiao-lin Jia4,Zhi-chao Sun31. School of Materials and Engineering, Inner......
conditions, the nucleation mechanism of dynamic recrystallization including twin induced nucleation, discontinuous nucleation, the second phase particle stimulated nucleation of DRX, and so on, can be found. Key words: magnesium alloy; hot compression; dynamic recrystallization; nucleation mechanism 镁及其合金优点很多,如低密度,高比强度,高比刚度,高比弹性模量,良好的减震和切削加工性,优异的电磁屏蔽性能等[1-2].但目前有关镁合金的研究,发展和应用还存在较大局限,这种局限主要是由于镁合金的室温塑性变形能力......