Experimental characterization of heat transfer coefficients for hot stamping AA7075 sheets with an air gap

Autor:	Xiaoming Yang, Wenchao Xiao, Baoyu Wang, Kailun Zheng
Rok vydání:	2020
Předmět:	Structural material Materials science Mechanical Engineering chemistry.chemical_element Dominant factor Heat transfer coefficient Hot stamping engineering.material Blank chemistry Aluminium Tool steel engineering Composite material Air gap (plumbing) Civil and Structural Engineering
Zdroj:	Archives of Civil and Mechanical Engineering. 20
ISSN:	1644-9665
Popis:	The heat transfer coefficient (HTC) is critical for hot stamping and in-die quenching. The air gap at interface is a dominant factor affecting the HTC, which is normally resulted from initial tooling clearance and thinning of deformed aluminum sheet. To precisely determine the HTCs under different air gaps, this research performed a comprehensive investigation on determining HTCs between an AA7075 blank and H13 tool steel. Hot stamping experiments were performed with different air gaps enabling HTC values were determined. Using the experimentally calibrated HTC, a finite-element model for hot stamping a door beam was established, which was successfully verified using the experimentation. The good predictions showed the reliability of the HTC values under different air gap conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bd0740425fc015895ea17e688956fd5b https://doi.org/10.1007/s43452-020-00091-5 Zobrazit plný text záznamu Full text from SpringerLink