Hot Press Forming of Tailor Welded Blank: Experiments and FE Modeling

Autor:	Jong Won Choi, Jae Bok Nam, Hyun Sung Son, Frédéric Barlat, Myoung-Gyu Lee
Rok vydání:	2012
Předmět:	Engineering Bending (metalworking) business.industry Mechanical Engineering Metallurgy Metals and Alloys Forming processes Weld line Welding Hot pressing Blank Finite element method law.invention Mechanics of Materials law Materials Chemistry Formability business
Zdroj:	ISIJ International. 52:2059-2068
ISSN:	1347-5460 0915-1559
Popis:	Hot Press Forming (HPF) of Tailor Welded Blank (TWB) was investigated with particular focus on the formability and phase transformation of the constituent base materials. Dilatometric analyses were conducted to study strength differentials for various cooling rates after heat treatment. U-draw bending tests were performed to evaluate the influence of a number of process parameters, namely, blank and tool temperatures, and cooling time, on the mechanical properties of the product. Formability at elevated temperature was assessed using forming limit diagrams for each monolithic material under realistic hot press forming conditions. Lab-scaled forming tests of a newly designed B-pillar were carried out to evaluate the formability of TWB under an actual hot press forming process. Finally, coupled thermomechanical finite element simulations, which utilize flow stresses and forming limit diagrams determined under realistic HPF conditions, were carried out. In particular, finite element simulation results for the weld-line displacement and thinning of the TWB were compared to experimental data for validation purpose.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1f0640ab9a9c82ac54b9f6c3a45dca68 https://doi.org/10.2355/isijinternational.52.2059 Zobrazit plný text záznamu