Ca对Mg-5Li-3Al-2Zn合金组织和力学性能的影响.pdf

V01．30No．12 铸造技术 Dec．2009 FOUNDRYTECHNOT。oGY ·1559· 王 涛，巫瑞智，李吉庆，张密林 (超轻材料与表面技术教育部重点实验室，哈尔滨工程大学，黑龙江哈尔滨150001) 闻化合物，A12Ca较多时，对基体的割裂作用较强。室温拉伸试验结果表明，添加2％Ca，强度和塑性同时提高，继续增加Ca 舍量，合金的力学性能下降。 关键词：Ca；Mg一5Li一3AI-2Zn合金}晶粒细化；力学性能 中圈分类号：TGl46．2+2文献标识码：A 文章编号：1000-8365(2009112—1559—04 EffectofCaonthe MiCrostructureSandMechanical of PropertiesMg--5Li·-3AI--2ZnAlloys WANG Mi-lin Tan，WURui-zhi．LI Ji-qing，ZHANG of MaterialsSurface ofEducation．Harbin (KeyLaboratorySuperlight TechnologyMinistry 150001，China) University，Harbin Abstract：Cawasaddedin to jtseffectonthe and Mg．5Li．3AI．2Znalloysstudy of Caadditive propertiesalloys，and was1％，2％，3％and6％．ThemicrOstructuresofalloys wereobservedwith EDS the and wereusedto meta¨OgraphiCmicroscope．XRD analyze microstructures．ItiSfoundthatCaadditioncan refinement．Caenrichesonthe producegrain grain boundaries．WhenCaadditioniS than willforminthe iSabrittle larger2％，A12Ca alloys．A12Ca whichdisseversthematrix．MechanicaItestswerecarriedoutatroom phase resultshowsthatboththe and increasewiththeincreaseofCa strengthelongation theCaadditioniS than2％，themechanicaI wilIbeworsened． larger properties refinement；Mechanical Keywords：Ca；Mg-5Li-3AI-2Znalloy；Grain