Temat: Equal Channel Angular Extrusion

Skocz do pozycji: 1.

Tytuł:: FEM simulation of combined extrusion method (ECAE/Direct Extrusion)
Autorzy:: Ayer, Ö
Tematy:: FEM
Equal Channel Angular Extrusion
Direct Extrusion
DEFORM 3D; Pokaż więcej
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Powiązania:: https://bibliotekanauki.pl/articles/118033.pdf Link otwiera się w nowym oknie
Opis:: Equal Channel Angular Extrusion (ECAE) is known as a severe plastic deformation process and material is deformed without any geometrical change. It is widely used for obtaining high mechanical properties from the product. Direct Extrusion is another plastic deformation process in which a workpiece is reduced in cross-section by forcing it through the die opening of a small cross-sectional area than that of the original billet. In this study, these two processes are combined together via using DEFORM 3D which is a very specialized software for metal forming operations. Lead is used as workpiece material to simulate hot forming conditions and also process parameters (die angle and die land length) were investigated. The forming load and strain components were calculated from the FEM results obtained from DEFORM 3D software.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effects of HE and ECAP processes on changes in microstructure and mechanical properties in copper, iron and zinc
Autorzy:: Kulczyk, Mariusz
Skorupska, Monika
Skiba, Jacek
Przybysz, Sylwia
Smalc-Koziorowska, Julita
Tematy:: hydrostatic extrusion
equal channel angular pressing
rate of plastic deformation
copper
iron
zinc
wytłaczanie hydrostatyczne
prasowanie kątowe równokanałowe
szybkość odkształcenia plastycznego
miedź
żelazo
cynk; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/27311391.pdf Link otwiera się w nowym oknie
Opis:: The research presented in this paper concerns the influence of the rate of plastic deformation generated directly in the processes of severe plastic deformations on the microstructure and properties of three metals: copper, iron and zinc. The equal channel angular pressing (ECAP) method was used, and it was performed at a low plastic deformation rate of ∼ 0.04 s−1. The high plastic strain rate was obtained using the hydrostatic extrusion (HE) method with the deformation rate at the level of ∼ 170 s−1. For all three tested materials different characteristic effects were demonstrated at the applied deformation rates. The smallest differences in the mechanical properties were observed in copper, despite the dynamic recrystallization processes that occurred in the HE process. In Armco iron samples, dynamic recovery processes in the range of high plastic deformation rates resulted in lower mechanical properties. The most significant effects were obtained for pure zinc, where, regardless of the method used, the microstructure was clearly transformed into bimodal after the ECAP process, and homogenized and refined after the HE process. After the HE process, the material was transformed from a brittle state to a plastic state and the highest mechanical properties were obtained.
Dostawca treści:: Biblioteka Nauki

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