微量Sc和Mn对Al-Mg合金组织与性能的影响  

The Effect of Minor Sc and Mn Addition on Microstructure and Tensile Property of Al-Mg Alloys

作　　者：周昌荣[1] 潘青林[2] 刘心宇[1] 

机构地区：[1]桂林电子工业学院信息材料科学与工程系,桂林541004 [2]中南大学材料科学与工程学院,长沙410083

出　　处：《材料导报》2006年第11期147-149,共3页Materials Reports

基　　金：国家自然科学基金支持项目(项目号59671003)

摘　　要：通过显微组织观察和室温拉伸试验，研究了微量Sc和Mn对Al-5Mg合金显微组织和拉伸性能的影响。结果表明：在Al-5Mg合金中添加微量Sc、Mn消除了合金铸态枝晶组织，强烈抑制合金退火过程中的再结晶，明显提高了合金的强度，其退火态合金的抗拉强度和屈服强度分别提高了19～67MPa和25～64MPa；复合添加微量Mn和Sc比单独添加Mn或Sc的强化作用和抑制再结晶效果更显著；合金强化机制为亚结构强化和Mn、Sc与铝的金属间化合物弥散质点的析出强化。The effect of minor scandium and manganese additions on microstructure and tensile property of Al- 5Mg alloy is investigated by observation of microstructure and tensile test at room temperature. The results show that addition of minor scandium and manganese can eliminate the dendrite, obviously improve the tensile and yield strength, which are improved 19～67 MPa and 25～64MPa respectively, and strongly restrain recrystallization of annealing of the alloy. The effect of co-addition of minor scandium and manganese is better than only addition of minor scandium or manganese. The strengthening mechanisms are considered as substrcture strengthening and dispersion strengthening of intermetallic compounds of scandium, manganese and aluminum.

关 键 词：AL-MG合金 含Sc铝合金 显微组织 AL3SC 

分 类 号：TG146.2[一般工业技术—材料科学与工程]