Influence of scandium on an Al–2% Si alloy processed by high-pressure torsion
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
Influence of scandium on an Al–2% Si alloy processed by high-pressure torsion
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| Creator |
Rajinikanth, V
Venkateswarlu, K Sen, Mani Kuntal Das, M Alhajeri, SN Langdon, TG |
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| Subject |
Aeronautics (General)
Chemistry and Materials (General) |
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| Description |
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 ∼0.38 to ∼0.15�m after 5 turns of HPT and the corresponding maximum tensile strength is increased from ∼325 to ∼375 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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| Publisher |
Elsevier BV
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| Date |
2011
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| Type |
Journal Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://nal-ir.nal.res.in/9965/1/HPT_paper.pdf
Rajinikanth, V and Venkateswarlu, K and Sen, Mani Kuntal and Das, M and Alhajeri, SN and Langdon, TG (2011) Influence of scandium on an Al–2% Si alloy processed by high-pressure torsion. Materials Science and Engineering , 528 . pp. 1702-1706. |
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| Relation |
http://nal-ir.nal.res.in/9965/
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