Affiliation:
1. Charles University
2. Research Institute for Metals, Ltd
Abstract
Fins in automotive heat exchangers are manufactured from Al-Mn-Fe-Si foils. Since
continuous twin-roll casting (TRC) reduces energy and work consumption, it is the preferred
manufacturing technology. The precipitation processes resulting from annealing of TRC Al-Mn-Fe-
Si based alloys were studied by resistometric measurements during linear heating from room
temperature up to 620 °C, hardness measurements and transmission electron microscopy
examinations. Primary particles and precipitates of the cubic α-Al15(Mn,Fe)3Si2, hexagonal Al8Fe2Si
and orthorhombic Al6(Fe,Mn) phases were identified. Phases of different types prevail in different
alloys depending on composition. The increase of cold rolling prestrain prior to annealing induces a
significant shift to lower temperatures of the start of precipitation. Prestrain accelerates precipitation
kinetics by redistributing solute atoms and favoring their segregation on nucleation sites such as
dislocations, subgrain and grain boundaries.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Reference5 articles.
1. B.Q. Li: JOM Vol. 47 (1995) p.13.
2. M. Cieslar, M. Slámová, J. Uhlíř, C. Coupeau and J. Bonneville: Kovové Materialy, in press.
3. S. P . Chen, N.C.W. Kuijpers and S. van der Zwaag: Mat. Sci. Eng Vol. A341 (2003) p.296.
4. J.E. Hatch: Aluminum. Properties and Physical Metallurgy (Metals Park, Ohio, ASM 1984).
5. X. Huang, N. Hansen and N. Tsuji: SCIENCE Vol. 312 (2006) p.249.
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献