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Metals 2017, 7(3), 78; doi:10.3390/met7030078

Comparison of Hydrostatic Extrusion between Pressure-Load and Displacement-Load Models

1
School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
2
National–Local Joint Engineering Research Centre of Nonferrous Metals and Processing Technology, Hefei 230009, China
*
Authors to whom correspondence should be addressed.
Academic Editors: Myoung-Gyu Lee and Yannis P. Korkolis
Received: 25 October 2016 / Accepted: 27 February 2017 / Published: 1 March 2017
(This article belongs to the Special Issue Advances in Plastic Forming of Metals)
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Abstract

Two finite element analysis (FEA) models simulating hydrostatic extrusion (HE) are designed, one for the case under pressure load and another for the case under displacement load. Comparison is made of the equivalent stress distribution, stress state ratio distribution and extrusion pressure between the two models, which work at the same extrusion ratio (R) and the same die angle (2α). A uniform Von-Mises equivalent stress gradient distribution and stress state ratio gradient distribution are observed in the pressure-load model. A linear relationship is found between the extrusion pressure (P) and the logarithm of the extrusion ratio (lnR), and a parabolic relationship between P and 2α, in both models. The P-value under pressure load is smaller than that under displacement load, though at the same R and α, and the difference between the two pressures becomes larger as R and α grow. View Full-Text
Keywords: hydrostatic extrusion; FEA; pressure load; die angle; extrusion ratio hydrostatic extrusion; FEA; pressure load; die angle; extrusion ratio
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Du, S.; Zan, X.; Li, P.; Luo, L.; Zhu, X.; Wu, Y. Comparison of Hydrostatic Extrusion between Pressure-Load and Displacement-Load Models. Metals 2017, 7, 78.

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