Finite element analysis of the phase transformation during a hot stamping process

authored by: Philipp Olle, Kathrin Voges-Schwieger, Bernd Arno Behrens
Abstract: A technology to manufacture highest-strength automotive components is hot stamping. This process combines forming and heat treatment of sheet metal material. During and after the hot stamping process phase transformations from austenite to other phases occur. For a realistic prediction of the resulting component properties by means of Finite Element Analysis it is essential to consider the complex effects of phase transformation. Experimental and numerical investigations of hot stamping of a cap profile are carried out. In respect of the numerical investigations, aspects of a developed material model are presented, that considers the transformation-induced stresses and the plastic anisotropy. The model is tested by comparison of experiment and simulation with respect to phase fractions and distortion. Due to the temperature history during the forming phase and the heat treatment phase marginal distortion of the hot-stamped cap profile occurs. The microstructure is characterized by a phase mixture of martensite and bainite. The results of the numerical simulation correspond with those of the experimental investigations. A significant influence of transformation-induced stresses on the calculated part distortion is detected.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
Type: Conference contribution
Pages: 2233-2244
No. of pages: 12
Publication date: 01.12.2010
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Mechanics of Materials
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{b79c8485e74f4293ac7ee032674a217e,
title = "Finite element analysis of the phase transformation during a hot stamping process",
abstract = "A technology to manufacture highest-strength automotive components is hot stamping. This process combines forming and heat treatment of sheet metal material. During and after the hot stamping process phase transformations from austenite to other phases occur. For a realistic prediction of the resulting component properties by means of Finite Element Analysis it is essential to consider the complex effects of phase transformation. Experimental and numerical investigations of hot stamping of a cap profile are carried out. In respect of the numerical investigations, aspects of a developed material model are presented, that considers the transformation-induced stresses and the plastic anisotropy. The model is tested by comparison of experiment and simulation with respect to phase fractions and distortion. Due to the temperature history during the forming phase and the heat treatment phase marginal distortion of the hot-stamped cap profile occurs. The microstructure is characterized by a phase mixture of martensite and bainite. The results of the numerical simulation correspond with those of the experimental investigations. A significant influence of transformation-induced stresses on the calculated part distortion is detected.",
keywords = "Hot stamping, Micro structural evolution, Numerical simulation, Plastic anisotropy",
author = "Philipp Olle and Kathrin Voges-Schwieger and Behrens, {Bernd Arno}",
year = "2010",
month = dec,
day = "1",
language = "English",
isbn = "9781617820168",
series = "65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010",
pages = "2233--2244",
booktitle = "65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010",
note = "65th ABM International Congress, 18th IFHTSE Congress and 1st TMS/ABM International Materials Congress 2010 ; Conference date: 26-07-2010 Through 30-07-2010",
}