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process project and optimizing the process parameters for forging complex-shape aviation products. Key words: aluminum alloy; defect analysis; isothermal precision forging; FEM; metal forming 1... of forging. There are two main reasons causing the defect. Fig.9 Velocity distribution of multi-ribs part Fig.10 Process of folding forming: (a) 11 mm; (b) 13 mm; (c) 15 mm 1) Improper metal......
J. Cent. South Univ. (2019) 26: 2943-2952 DOI: https://doi.org/10.1007/s11771-019-4226-0 Inverse Stone-Thrower-Wales defect and transport properties of 9AGNR double-gate graphene nanoribbon FETs... of Springer Nature 2019 Abstract: Defect-based engineering of carbon nanostructures is becoming an important and powerful method to modify the electron transport properties in graphene nanoribbon FETs......
J. Cent. South Univ. (2016) 23: 765-777 DOI: 10.1007/s11771-016-3122-0 Research on technological parameters of pressure forming with hot granule medium on AA7075 sheet DONG Guo-jiang(董国疆)1, ZHAO... granule medium pressure forming (HGMF) process is a new process in which granule medium replaces the medium in existing flexible-die hot forming process, such as liquids, gases or viscous medium. Hot......
An accurate theoretical study on intrinsic defect energetics in rutile TiO2 MA Xin-guo(马新国), JIANG Jian-jun(江建军), LIANG Pei(梁培), WANG Juan(王娟) Department of Electronic Science... plane-wave pseudopotential method. The structural parameters of defect-free bulk rutile TiO2 were calculated, which are close to experimental data. And the effects of point defects on the geometry......
deep cups are drawn successfully. Key words: 5A06 aluminum alloy; plate; warm reverse deep drawing; forming defect 1 Introduction In order to improve the fuel efficiency and reduce the emissions.... Due to the poor formability and multiple step forming processes at room temperature, it is difficult and uneconomic for the aluminum alloy sheet to form a complex shape. Therefore, warm forming process......
Laser rapid forming of low cost hydride-dehydride titanium alloy powder CHEN Jing(陈 静), ZHANG Feng-ying (张凤英), LIN Xin(林 鑫), TAN Hua(谭 华), HUANG Wei-dong(黄卫东) State Key Laboratory... was employed to investigate the metallurgical quality and mechanical properties of laser formed samples. With appropriate control of the laser forming processing parameters and the loose density......
Shape and deformation The folding defect is prone to occurrence in the process. The preforming shape determined by finish forming is difficult to form by one step preforming. The simulation results indicate that folding and matte surface may appear in preforming process, and the folding defect in finish forming is often caused by a matte surface of preform, as shown in Fig. 5. Thus, the preform......
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the performance of the sheet metal forming and overcome the defect of conventional process needs to be researched and the characteristics of the new process are simple mold, short cycle and low cost [1-3...J. Cent. South Univ. (2017) 24: 766-772 DOI: 10.1007/s11771-017-3478-9 Deep drawing of cup shell by powder cavity flexible forming technology XUE Ya-hong(薛亚红)1, CHEN Ke(陈科)1, FAN Cun-jie(范存杰)1, LUO......
