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numerical torsion shear test is presented on hollow cylinder specimen which is performed on a spherical assemblage with fixed principal stress axes using the discrete element code PFC3D. Stack wall... decrease. The effects of localization on specimens illustrate that global stress and strain recorded from a hollow cylinder apparatus could not represent the localized response. The shearing band......
45A钢方坯夹杂物行为研究翟俊1,吴巍1,吴伟1,周远华2,熊银成2,胡兵2(1.北京市钢铁研究总院冶金工艺研究所2.重庆钢铁股份有限公司,重庆 400084)摘 要:为了了解45A钢铸坯夹杂物行为,利用显微镜,电子探针和大样电解等分析方法对45A钢铸坯中夹杂物分布,数量和种类做了分析.结果表明:铸坯夹杂物整体控制水平较好,其中铸坯夹杂物指数平均为22.2个/mm2,铸坯中心夹杂物指数为25.8个/mm2;铸坯大样电解结果表明大型夹杂物总量平均为2.23 mg/(10 kg),夹杂物直径都大于300μm;大型夹......
Compound fabrication technology of semi-solid billet of Al-Si alloy based on SIMA method XUE Ke-min(薛克敏), MI Guang-bao(弭光宝), WANG Qing-rui(王清瑞) School of Materials Science and Engineering, Hefei... flowers are in bloom. Among them, SIMA, invented by YOUNG et al[1] in 1981, is one of the typical processes of fabricating semi-solid billet under solid state condition. The essence of SIMA is utilizing......
-模板法;光降解 中图分类号:O643;O644 文献标志码:A Preparation of composite WO3-TiO2 hollow spheres and its photocatalytic properties L? Ke-zhen1, 2, LI Jie1, 2, LI Wen-zhang1, 2, CHEN Qi-yuan1... South University, Changsha 410083, China) Abstract: Composite photocatalysts WO3-TiO2 hollow spheres were prepared by hydrothermal-template method using tetrabutylortitanate and ammonium metatungstate......
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as pore-forming materials through the counter-gravity infiltration casting system. The results show that along with the increase of the metal temperature and hollow balls preheating temperature and the particle size of hollow balls, the length of infiltration is getting longer. Besides, along with the increase of the particle size of the hollow ball, the void content decreases. Improving the filling......
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Trans. Nonferrous Met. Soc. China 22(2012) 1161-1168 Size-controlled preparation of hollow silica spheres and glyphosate release LIU Chun1,2, YIN Heng-bo1, WANG Ai-li1, WU Zhan-ao3, WU Gang3, JIANG... 132013, China; 3. Chinese PLA 359 Hospital, Zhenjiang 212001, China Received 15 November 2011; accepted 16 April 2012 Abstract: Different-sized hollow SiO2 spheres of 249–1348 nm in diameter were......
Trans. Nonferrous Met. Soc. China 22(2012) s89-s94 Synthesis of hierarchical hollow spherical CdS nanostructures by microwave hydrothermal process HU Bao-yun1, JING Zhen-zi1, HUANG Jian-feng2, YUN... 16 August 2012 Abstract: Hierarchical hollow spherical CdS nanostructures were synthesized via a simple microwave hydrothermal(M-H) process using CdCl2·H2O and Na2S2O3·5H2O as raw materials and adding......