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The effects of boron additions on the microstructure, hardness and tensile properties of in situ Al–15%Mg2Si composite
Highlights ► Primary Mg2Si particles refined by B additions. ► Some Borides were observed in specimens containing B. ► B decreased the hardness values of the composite. ► Addition of B improved UTS and elongation values of the composite.
Abstract In this work the influences of Boron (B) content on the microstructure, hardness and mechanical properties of Al–15%Mg2Si composite were investigated. The results showed that with the increase of B content, the average size of primary Mg2Si particles decreased from ∼23 to ∼5μm and the volume fraction of them decreased too, but the amount of alpha phase increased. It was found that with the addition of 0.3%B, the ultimate tensile strength (UTS) and elongation values reached from 252 to 273MPa and 2.2% to 3.7%, respectively. It was revealed from hardness tests that B decreases the hardness values of the composite. Also, a small amount of Boride compounds formed as a result of the addition of B, which were the main reason of the decreasing of tensile properties at samples with high B.
The effects of boron additions on the microstructure, hardness and tensile properties of in situ Al–15%Mg2Si composite
Highlights ► Primary Mg2Si particles refined by B additions. ► Some Borides were observed in specimens containing B. ► B decreased the hardness values of the composite. ► Addition of B improved UTS and elongation values of the composite.
Abstract In this work the influences of Boron (B) content on the microstructure, hardness and mechanical properties of Al–15%Mg2Si composite were investigated. The results showed that with the increase of B content, the average size of primary Mg2Si particles decreased from ∼23 to ∼5μm and the volume fraction of them decreased too, but the amount of alpha phase increased. It was found that with the addition of 0.3%B, the ultimate tensile strength (UTS) and elongation values reached from 252 to 273MPa and 2.2% to 3.7%, respectively. It was revealed from hardness tests that B decreases the hardness values of the composite. Also, a small amount of Boride compounds formed as a result of the addition of B, which were the main reason of the decreasing of tensile properties at samples with high B.
The effects of boron additions on the microstructure, hardness and tensile properties of in situ Al–15%Mg2Si composite
Azarbarmas, Mortaza (Autor:in) / Emamy, Masoud (Autor:in) / karamouz, Mostafa (Autor:in) / Alipour, Mohammad (Autor:in) / Rassizadehghani, Jafar (Autor:in)
21.05.2011
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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