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Yang Y.,General Research Institute for Nonferrous Metals, China | Yan X.,General Research Institute for Nonferrous Metals, China | Wang Z.,Easpring Material Technology | Chen S.,General Research Institute for Nonferrous Metals, China | Li H.,General Research Institute for Nonferrous Metals, China
Cailiao Kexue yu Gongyi/Material Science and Technology | Year: 2014

Cross section distortion and spring back affect the geometric accuracy of bending parts of aluminum rectangular tube in rotary-draw bending. To control dimension precision of bending parts, the influence of yield strength and relative bending radius on the cross section distortion and spring back was studied by experiment and theoretical analysis. The results showed that the cross section distortion and spring back of radius of curvature increased with the increase of yield strength, but the cross section distortion at vertical radial direction changed relatively little. With the increase of the relative bending radius, the cross section distortion at radial direction and spring back degree of radius of curvature decreased gradually. Whereas the cross section distortion at vertical radial direction changed little. Source


Easpring Material Technology | Entity website

:300073 010-52269718 :010-52269709,:shenji@easpring.com ...


Easpring Material Technology | Entity website

:300073 010-52269718 :010-52269709,:shenji@easpring.com ...


Chen Y.-B.,University of Science and Technology Beijing | Chen Y.-B.,Easpring Material Technology | Chen Y.-B.,Beijing General Research Institute of Mining And Metallurgy | Hu Y.,University of Science and Technology Beijing | And 3 more authors.
International Journal of Minerals, Metallurgy and Materials | Year: 2010

Samples with the nominal stoichiometry Li1.05Cr 0.1Mn1.9O4-z F z (z=0, 0.05, 0.1, 0.15, and 0.2) were synthesized via the solid-state reaction method and characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), galvanostatic charge/discharge, and slow rate cyclic voltammetry (SSCV) techniques. The results show that the pure spinel phase indexed to Fd3m can be obtained when z=0, 0.05, and 0.1. The substitution of F for O with z≤0.1 contributes to the increase of initial capacity compared with Li 1.05Cr0.1Mn1.9O4 spinels. However, when the F-dopant content is designed to be 0.15 and 0.2, the Li 1.05Cr0.1Mn1.9O4-z F z samples deliver relatively low capacity and poor cycling properties at 55°C. © 2010 University of Science and Technology Beijing and Springer Berlin Heidelberg. Source

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