The influence of the growth rate on the eutectic spacings, undercoolings and microhardness of directional solidified bismuthalead eutectic alloy

BiaPb alloy at the eutectic composition was unidirectionally solidified upwards with five different growth rates (VANB=ANB7.05a113.09ANB mu m/s) at constant temperature gradient (GANB=ANB2.18ANBK/mm) in a Bridgman type directional growth furnace in order to investigate dependency of eutectic spacing...

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Bibliographic Details
Published in:Current applied physics 2013-05, Vol.13 (3), p.587-593
Main Authors: Kocak, Y, Engin, S, Boeyuek, U, Marasli, N
Format: Article
Language:English
Subjects:
Eutectic composition
Eutectic temperature
Eutectics
Information technology
Microhardness
Quenching (cooling)
Supercooling
Undercooling
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Summary:BiaPb alloy at the eutectic composition was unidirectionally solidified upwards with five different growth rates (VANB=ANB7.05a113.09ANB mu m/s) at constant temperature gradient (GANB=ANB2.18ANBK/mm) in a Bridgman type directional growth furnace in order to investigate dependency of eutectic spacing (I>), minimum undercooling (IT) and microhardness (HV) on the growth rates (V). The values of I> and HV were measured from the quenched samples and the minimum undercooling (IT) were determined from the JacksonaHunt eutectic theory. The dependency of eutectic spacings, microhardness and undercooling on growth rate was investigated. According to these results it has been found that the value of I> decreases with increasing the value of V and that the values of HV and IT increase for a constant G. The values of I>2V, I>IT and ITV-0.5 were determined by using the values of I>, IT and V. The results obtained in the present work have been compared with those predicted by the JacksonaHunt eutectic theory and with similar experimental results.
ISSN:1567-1739