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chamber, leading to the die through which profile whose cross section was larger than that of the feedstock could be made. HAWKES and MORGAN [8] reported the CONFORM extrusion of copper or aluminum... process with the expansion combination die so that the pipe with cross section larger than that of the feedstock was produced, and the corresponding equipment and relevant tools were designed......
at 468 K for 5 h. The ECAP die used in the present work consists of two channels with an equal cross-section that intersect at an angle Φ, called die channel angle, which is 90°, and the outer corner... and Engineering A, 2007, 459: 137-144. [7] Nagarajan D, Chakkingal U, Venugopal P. Influence of cold extrusion on the microstructure and mechanical properties of an aluminium alloy previously subjected to equal......
of an extruded Mg–Ni–Y–RE alloy processed by equal channel angular extrusion [J]. Journal of Alloys and Compounds, 2009, 473: 79-86. [7] LI D J, ZENG X Q, DONG J, ZHAI C Q, DING W J. Microstructure evolution...), and the chemical formula of the solid solution can be identified as (Mg1-xZnx)12Ce. The isothermal section of Mg-Zn-Ce system in Mg-rich corner at 400 °C was constructed. Key words: Mg-Zn-Ce system......
]. China Elevator, 2008, 19(23): 31-37. [2] Stok B, Halilovic M. Analytical solutions in elasto-plastic bending of beams with rectangular cross section[J]. Applied Mathematical Modelling, 2009, 33(3... lateral bending of elevator guide rail ZHOU Lei, YU Zhong-hua (Institute of Modern Manufacturing Engineering, Zhejiang University, Hangzhou 310027, China) Abstract: In order to develop auto......
4.2 Microstructural variations Fig.7 gives morphology comparison of cross sections between conventional welded joint and RE welded joint. It can be seen from Fig.7 that rotating extrusion can... Rotating extrusion technique and its effect on quality of aluminum alloy thin-plate weldments LI Jun(李 军), YANG Jian-guo(杨建国), YAN De-jun(闫德俊), ZHANG Yong(张 勇), FANG Hong-yuan(方洪渊......
, such as equal channel angular pressing (ECAP) [2-4] and reciprocating extrusion (RE) [5-7], is effective to improve the ductility of the materials both at room and elevated temperatures. RE appears...-section area of 2 mm?3 mm. Uniaxial tensile tests were conducted in a temperature range between 443 and 523 K in air with constant cross-head speed. The initial strain rate range was from 3.3?10-4 to 3.3......
extrusion, backward extrusion, and lateral extrusion by a methodof finite element simulation. Then on the base of synthesizing and correcting tradi-tional friction models, a new general friction...RESEARCH ON THE SELECTION OF FRICTION MODELS IN THE FINITE ELEMENT SIMULATION OF WARM EXTRUSION Z.L.Zhang1,H.S.Xiao1,X.B.Lin1 (1.National Die and Mold CAD Engineering Research Center, Shanghai Jiao......
extrusion methods, such as equal channel angular pressing [2-4], isothermal extrusion [5], and twist extrusion [6-7]. But because of the complicated plastic deformation, the complexity..., 2003, 11(3): 401-416. [12] YANG F Q, SARAN A, OKAZAKI K. Finite Element simulation of equal channel angular extrusion [J]. Journal of Materials Processing Technology, 2005, 166(1): 71-78. [13] ZHI P......
J. Cent. South Univ. (2020) 27: 3544-3566 DOI: https://doi.org/10.1007/s11771-020-4509-5 Numerical simulation research on response characteristics of surrounding rock for deep super-large section... Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: The stability control of surrounding rock for large or super-large section chamber is a difficult technical problem......
be significantly enhanced by texture control and grain refinement through severe plastic deformation (SPD) such as equal channel angular pressing (ECAP)[2, 6], cyclic extrusion and compression (CEC)[1...-qin, DING Wen-jiang. An electron back-scattered diffraction study on the microstructure evolution of AZ31 Mg alloy during equal channel angular extrusion [J]. Journal of Alloys and Compounds, 2006......
