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welding parameters, the causes of pore formation were systematically disposed, and the effects of porosity on the microstructure and mechanical properties of the joint were analyzed. The microstructure... higher than that in the base metal due to the second phase strengthening of β-Mg17(Al, Zn)12 formed in the weld. Key words: Mg alloy; gas metal arc welding; porosity; microstructure; second phase......
and Engineering, Central South University, Changsha 410083, China) Abstract: To study the relationship between effective thermal conductivity and particle size, porosity and moisture content... 1.2%. The two-phase effective thermal conductivities of the silicon carbide particle, quartz sand particle, and engineering sand particle are greatly affected by the porosity. They decrease......
rates were obtained. To determine the pore-parameter of the porous media, the internal structure of the bed was also obtained using image processing technique. The results show that the porosity... resonance imaging; porous media; flow velocity; porosity; pore equivalent diameter ......
pressing(HIP) was applied to Mg-6 Gd-3 Y-0.5 Zr(GW63) alloy to reduce shrinkage porosity,thus, to enhance the integrity and reliability of castings. During HIP process, shrinkage porosity was closed by grain compatible deformation and subsequent diffusion across the bonding interface. The amount of initial shrinkage porosity was the key factor for shrinkage porosity closure. HIP was testified......
Effect of traveling magnetic field on gas porosity during solidification XU Yan-jin, SU Yan-qing, LUO Liang-shun, LI Xin-zhong, LIU Jiang-ping, GUO Jing-jie, CHEN Rui-run, FU Heng-zhi School... in the sample decreases with increasing the intensity of traveling magnetic field. Key words: electromagnetic force; traveling magnetic field; gas porosity; aluminum alloy 1 Introduction......
fraction of vanadium iron ore in northern Gansu reaches 58.5% and 55.8% with or without shear action. When adding 2 r/min shear action, the average porosity of bed decreases from 47.62% to 40.98%. The pore... to achieve enhanced drainage. Key words: paste filling; 3D reconstruction; porosity; water conduction channel 在"绿水青山就是金山银山"的今天,保证矿产企业可持续健康发展的必由之路就是在新形势下建设资源节约型与环境友好型的绿色矿山[1].随着可持续发展理念的深入,为了充分利用矿产资源,矿产企业普遍......
without any deformation is about 4% due to oxidation of SiC powders. SiC preforms with porosity ranging from 0.47 to 0.63 can be obtained by modulating graphite content. Key words: SiC preforms; oxidation bonding; porosity; pore-forming agent; linear expansion 高增强体含量的SiC/Al复合材料......
土深度-孔隙率变化曲线 Fig. 7 Variation curve of concrete depth with porosity 图8 透水试件纵向截面图 Fig. 8 Longitudinal section of permeable specimen 2.2 透水试验结果分析 透水试件质量的变化等同于堆积密度的变化,可以用来反映透水试件的密实情况.根据IBRAHIM等[20]的研究,堆积... for pervious concrete (PC) after the phenomenon of clogging[J]. Construction and Building Materials, 2020, 248: 118672. [9] MARTIN W D, PUTMAN B J. Comparison of methods for measuring porosity of porous......
-freezing asphalt concrete, i e, MFL(Mafilon) modified asphalt concrete, MIP(mercury intrusion porosity) method was used to obtain the data including porosity and pore size distribution in micro scale. Results show that the porosity grows up with the increase of immersion duration and the salt content. During the immersion, the amount of large pores(60-200 μm) grow up gradually and porosity also......
