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Thermal stability of twin-roll cast Al–Fe–Mn–Si sheets accumulative roll bonded at different temperatures by M. Slámová; P. Homola; M. Karlík is a Engineering article available to read on EtoBox.

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Accumulative roll bonding (ARB) allows production of large amounts of ultra-fine grained materials. Therefore, ARB is suitable for industrial applications. Refinement efficiency is improved when the input materials contain fine particles, such as in twin-roll cast (TRC) alloys. The effect of the ARB temperature on bond strength, microstructure, properties and thermal stability of a TRC Al-Fe-Mn-Si alloy was studied. After two cycles at 200 • C, grain sizes of 0.4-0.8 m are achieved along with areas of grain sizes of 0.08-0.3 m. The hardness increases significantly during first two ARB cycles and afterwards it increases less. Processing at higher temperatures produces a better bonding but smaller hardness increments. Partial recrystallization during heating above 250 • C results in a less effective grain refinement depending on the annealing temperature and on the number of cycles. The thermal stability of the samples processed at 250 • C is better as compared to higher temperatures and to conventional cold rolling.

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Author

M. Slámová; P. Homola; M. Karlík

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-5093)

Published

2007

Language

EN

Field

Engineering (Physical Sciences)