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Influence of scandium on an Al-2% Si alloy processed by high-pressure torsion

Rajinikanth, V., Venkateswarlu, K., Sen, M.K., Das, M., Alhajeri, S.N. and Langdon, T.G. (2011) Influence of scandium on an Al-2% Si alloy processed by high-pressure torsion Materials Science and Engineering: B, 528, (3), pp. 1702-1706. (doi:10.1016/j.msea.2010.10.102).

Record type: Article


High-pressure torsion (HPT) was used to process Al–2% Si and Al–2% Si–0.25% Sc alloys for up to five turns and the mechanical properties of the processed materials were evaluated using the ball indentation technique (BIT). The results show that the presence of Al3Sc precipitates is effective in producing higher strength levels and greater grain refinement in the Al–2% Si–0.25% Sc alloy. The introduction of scandium reduces the grain size of the Al–2% Si alloy from not, vert, similar0.38 to not, vert, similar0.15 ?m after 5 turns of HPT and the corresponding maximum tensile strength is increased from not, vert, similar325 to not, vert, similar375 MPa. The grain and substructure formation in the Al–2% Si alloy is similar to aluminum with dislocation cell formation and a reasonably recovered microstructure whereas in the Al–2% Si–0.25% Sc alloy it is non-homogeneous with arrays of non-equilibrium boundaries and dislocation tangles within the grains

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e-pub ahead of print date: 9 November 2010
Published date: January 2011
Organisations: Engineering Mats & Surface Engineerg Gp, Faculty of Engineering and the Environment


Local EPrints ID: 188523
ISSN: 0921-5107
PURE UUID: 5fc8d784-49d8-47d1-9f51-fa0a912dab24
ORCID for T.G. Langdon: ORCID iD

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Date deposited: 25 May 2011 14:39
Last modified: 18 Jul 2017 11:42

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Author: V. Rajinikanth
Author: K. Venkateswarlu
Author: M.K. Sen
Author: M. Das
Author: S.N. Alhajeri
Author: T.G. Langdon ORCID iD

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