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论文类型： 期刊论文

发表时间： 2008-12-01

发表刊物： TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA

收录刊物： SCIE、ISTIC、Scopus

卷号： 18

期号： ,1

页面范围： S283-S287

ISSN号： 1003-6326

关键字： electromagnetic suspension casting; microstructure; grain refinement; tensile properties

摘要： CaC2 particulates reinforced magnesium materials were synthesized using a new technique-electromagnetic suspension casting(ESC). The microstructure and composition of magnesium alloys were investigated and the mechanical properties of alloys were tested. The tensile fracture surfaces were also studied by scanning electron microscopy. And the grain refinement effect of alloys was also examined. The results indicate that proper additions of CaC2 particulates are found to be efficient in refining the microstructure of magnesium materials. The tensile properties of alloys are consistent with the grain sizes. 0.26% (mass fraction) of CaC2 addition reduces the mean grain size of pure magnesium from more than 2 trim to 125 mu m, and the ultimate tensile strength of pure magnesium at room temperature decreases from 77 to 148 MPa.