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Materials 2015, 8(4), 2030-2042; doi:10.3390/ma8042030

Evaluation of Contact Heat Transfer Coefficient and Phase Transformation during Hot Stamping of a Hat-Type Part

1
Department of Automotive Engineering, Kookmin University, 77, Jeongneung-ro, Seongbuk-gu, Seoul 136-702, Korea
2
Graduate School of Automotive Engineering, Kookmin University, 77, Jeongneung-ro, Seongbuk-gu, Seoul 136-702, Korea
3
School of Advanced Materials Engineering, Kookmin University, 77, Jeongneung-ro, Seongbuk-gu, Seoul 136-702, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Klara Hernadi
Received: 21 January 2015 / Revised: 16 April 2015 / Accepted: 17 April 2015 / Published: 22 April 2015
(This article belongs to the Section Manufacturing Processes and Systems)
View Full-Text   |   Download PDF [2227 KB, uploaded 22 April 2015]   |  

Abstract

Using an inverse analysis technique, the heat transfer coefficient on the die-workpiece contact surface of a hot stamping process was evaluated as a power law function of contact pressure. This evaluation was to determine whether the heat transfer coefficient on the contact surface could be used for finite element analysis of the entire hot stamping process. By comparing results of the finite element analysis and experimental measurements of the phase transformation, an evaluation was performed to determine whether the obtained heat transfer coefficient function could provide reasonable finite element prediction for workpiece properties affected by the hot stamping process. View Full-Text
Keywords: phase transformation; workpiece; hot stamping phase transformation; workpiece; hot stamping
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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MDPI and ACS Style

Kim, H.-K.; Lee, S.H.; Choi, H. Evaluation of Contact Heat Transfer Coefficient and Phase Transformation during Hot Stamping of a Hat-Type Part. Materials 2015, 8, 2030-2042.

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