The characteristics of aluminum–scandium alloys processed by ECAP

Venkateswarlu, K and Rajinikanth, V and Ajoy Kumar, Ray and Cheng, XU (2010) The characteristics of aluminum–scandium alloys processed by ECAP. Materials Science and Engineering A, 527. pp. 1448-1452.

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Aluminum–scandium alloys were prepared having different scandium additions of 0.2, 1.0 and 2.0 wt.% and these alloys were processed by equal-channel angular pressing (ECAP) at 473 K. The results show the grain refinement of the aluminum matrix and the morphology of the Al3Sc precipitates depends strongly on the scandium concentration. The tensile properties were evaluated after ECAP by pulling to failure at initial strain rates from 1.0×10−3 to 1.0×10−1 s−1. The Al–1% Sc alloy exhibited the highest tensile strength of ∼250MPa at a strain rate of 1.0×10−1 s−1. This alloy also exhibited a superior grain refinement of ∼0.4�m after ECAP where this is attributed to a smaller initial grain size and an optimum volume fraction of dispersed Al3Sc precipitates having both micrometer and nanometer sizes

Item Type: Article
Subjects: CHEMISTRY AND MATERIALS > Metals and Metallic Materials
Depositing User: Dr K Venkateswarlu
Date Deposited: 26 Jul 2010 04:53
Last Modified: 26 Jul 2010 04:54

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