Aluminum integral foams with tailored density profile by adapted blowing agents

Journal article
(Original article)


Publication Details

Author(s): Hartmann J, Fiegl T, Körner C
Journal: Applied Physics A: Materials Science and Processing
Publisher: Springer Heidelberg
Publication year: 2014
Volume: 115
Journal issue: 2
Pages range: 651-660
ISSN: 1432-0630
Language: English


Abstract


The goal of the present work is the variation of the structure of aluminum integral foams regarding the thickness of the integral solid skin as well as the density profile. A modified die casting process, namely integral foam molding, is used in which an aluminum melt and blowing agent particles (magnesium hydride MgH) are injected in a permanent steel mold. The high solidification rates at the cooled walls of the mold lead to the formation of a solid skin. In the inner region, hydrogen is released by thermal decomposition of MgH particles. Thus, the pore formation takes place parallel to the continuing solidification of the melt. The thickness of the solid skin and the density profile of the core strongly depend on the interplay between solidification velocity and kinetics of hydrogen release. By varying the melt and blowing agent properties, the structure of integral foams can be systematically changed to meet the requirements of the desired field of application of the produced component. © 2014 Springer-Verlag Berlin Heidelberg.



FAU Authors / FAU Editors

Fiegl, Tobias
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Hartmann, Johannes
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)
Körner, Carolin Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Research Fields

Lightweight Materials
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


How to cite

APA:
Hartmann, J., Fiegl, T., & Körner, C. (2014). Aluminum integral foams with tailored density profile by adapted blowing agents. Applied Physics A: Materials Science and Processing, 115(2), 651-660. https://dx.doi.org/10.1007/s00339-014-8377-4

MLA:
Hartmann, Johannes, Tobias Fiegl, and Carolin Körner. "Aluminum integral foams with tailored density profile by adapted blowing agents." Applied Physics A: Materials Science and Processing 115.2 (2014): 651-660.

BibTeX: 

Last updated on 2018-03-12 at 20:50