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Keywords = multiple reduction die (MRD)

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14 pages, 5377 KiB  
Article
Effect of a Multiple Reduction Die on the Residual Stress of Drawn Materials
by Jeong-Hun Kim, Chang-Hyun Baek, Sang-Kon Lee, Jong-Hun Kang, Joon-Hong Park and Dae-Cheol Ko
Materials 2021, 14(6), 1358; https://doi.org/10.3390/ma14061358 - 11 Mar 2021
Cited by 3 | Viewed by 2016
Abstract
Residual stress may influence the mechanical behavior and durability of drawn materials. Thus, this study develops a multiple reduction die (MRD) that can reduce residual stress during the drawing process. The MRD set consists of several die tips, die cases, and lubricating equipment. [...] Read more.
Residual stress may influence the mechanical behavior and durability of drawn materials. Thus, this study develops a multiple reduction die (MRD) that can reduce residual stress during the drawing process. The MRD set consists of several die tips, die cases, and lubricating equipment. All the die tips of the MRD were disposed of simultaneously. Finite element analysis of the drawing process was performed according to the reduction ratio of each die tip, and the variables in drawing process with the MRD were optimized using a deep neural network to minimize the residual stress. Experiments on the drawing process with the conventional die and MRD were performed to evaluate the residual stress and verify the effectiveness of the MRD. The results of X-ray diffraction measurements indicated that the axial and hoop residual stresses on the surface were dramatically reduced. Full article
(This article belongs to the Special Issue Metal Forming: Fundamentals, Simulation and Applications)
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