Study of the damage of AA 8006 twin-roll cast thin sheets during forming of heat exchanger fins

被引：0
|
作者：
Karlík, M. [1 ]
Siegl, J. [1 ]
Slámová, M. [2 ]
Birol, Y. [3 ]
机构：
[1] Department of Materials, Czech Technical University in Prague, Fac. of Nucl. and Phys. Engineering, Trojanova 13, CZ-120 00 Prague 2, Czech Republic
[2] Research Institute for Metals, Ltd., Paneské Břežany, CZ-250 70 Odolena Voda, Czech Republic
[3] Tübitak, Marmara Research Center, Gebze, Kocaeli, Turkey
来源：
Materials Science Forum | 2000年 / 331卷
关键词：
Crack initiation - Crystal structure - Deep drawing - Electron microscopy - Fins (heat exchange) - Formability - Grain size and shape - Heat exchangers - Intermetallics - Particle size analysis - Sheet metal - Strip metal;
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摘要：
A study of typical cracks which occur during forming operations of heat exchanger fins from strip-cast Al-Fe-Mn-Si (AA 8006) alloy sheets is presented. A number of failed heat exchanger lamellae, 0.10 to 0.25 mm thick, were examined by light and electron microscopy. Formability of the material correlates rather well with the grain structure and the distribution of second phase particles in the matrix. Sheets having good formability usually contain coarser intermetallic particles when compared with sheets torn during deep drawing operations. It was found that failure was due to surface grain size inhomogeneity in many cases, therefore a uniform grain structure is also favorable for improved formability.
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