Fracture Property Correlation of Rheocast (EMS) and Thixocast 6061 Aluminium Alloy

The present study has been taken up to establish fracture property correlation of the semi solid processed 6061 aluminium alloy. Electro Magnetic Stirring (EMS) has been performed to get non-dendritic billets and then the alloy has been thixocast using a High pressure die casting machine. Tensile te...

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Bibliographic Details
Published inSolid state phenomena Vol. 217-218; pp. 405 - 411
Main Authors Singh, Shailesh K., Chattopadhyay, Kamanio, Das, Prosenjit, Dutta, Pradip
Format Journal Article
LanguageEnglish
Published Zurich Trans Tech Publications Ltd 01.09.2014
Subjects
AA6061 Aluminum Alloy
Fracture
Rheocast
Microstructure
Tensile Properties
Thixocast
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Summary:The present study has been taken up to establish fracture property correlation of the semi solid processed 6061 aluminium alloy. Electro Magnetic Stirring (EMS) has been performed to get non-dendritic billets and then the alloy has been thixocast using a High pressure die casting machine. Tensile tests have been performed to estimate mechanical properties of the semi solid processed alloy. Fracture behaviour of the alloy has been investigated at the intermediate EMS cast state and subsequent final thixocast state, employing uniaxial tensile tests at 0.001s-1 strain rate and at room temperature. Fracture surface morphology of the EMS cast state shows that the presence of micro porosity is responsible for crack initiation and final fracture. Our results confirm that the dimpled rupture of primary Al phase is responsible for improved mechanical properties in the thixocast state of the alloy.
Bibliography:Selected, peer reviewed papers from the 13th International Conference on Semi-Solid Processing of Alloys and Composites (S2P 2014), September 15-17, 2014, Muscat, Sultanate of Oman
ISSN:1012-0394
1662-9779
1662-9779
DOI:10.4028/www.scientific.net/SSP.217-218.405