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SOLIDIFICATION CRACKING

discusses the use of LabVIEW (Laboratory Virtual Instruments and Engineering Workbench) to predict the solidification cracking of high strength aluminum alloys. The material used for this investigation was 2014 aluminum alloys. This alloy is greatly used in aerospace industries. The main reason for selecting this 2014 aluminum alloy is that it is a crack susceptible material and almost this is considered as non weldable material.

 

In this present work, an attempt has been made to reduce the solidification cracking tendency by vibration applied during welding. Studies were carried out in two different methods. One had been welded without vibration and another one had been welded with vibration during welding.

 

The experiment results show that the solidification cracking tendency was generally reduced when the specimen was welded with vibration applied during welding. Using these experimental data, the LabVIEW graphical programming was used to predict the solidification cracking length. This uses the polynomial which is the function of frequency.

When the frequency of the vibrated specimen is given, the solidification cracking length can be predicted. The other parameters like amplitude, heat input etc., also affect the solidification cracking length and lead to minor change in the polynomial and hence the approximate solidification cracking length can be predicted..



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Thu, 14/04/2011 - 19:15

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