• the effects of boron additions on the microstructure, hardness and tensile properties of in situ al–15%mg2si composite

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    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 494
    • تعداد پرسش و پاسخ ها: 0
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     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 ∼5 μm 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 273 mpa 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.

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