Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 280, Issue 1, Pages 151-155Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0921-5093(99)00682-6
Keywords
scandium; Al alloy; microstructure; strengthening
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A series of Al-Mg based alloy plates with thickness of 4 mm containing minor Sc and Zr were prepared. Tensile properties and microstructures of the alloys were studied. The results show that adding 0.2% Sc and 0.1% Zr to Al-5Mg alloy, the strength of the alloy increased by 150 MPa. Strengthening effect is the most outstanding among all minor alloying elements in aluminum alloys. Strength increment caused by adding minor Sc and Zr is attributed mainly to fine grain strengthening, precipitation strengthening of Al-3(Sc, Zr) and substructure strengthening. Published by Elsevier Science S.A.
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