杂质及Ce含量对Al-Li-Cu-Zr和Al-Li-Mg-Zr合金韧化水平的影响  

Effect of the variable contents of impurities and Ce addition on the toughening levels of alloys Al-Li-Cu-Zr and Al-Li-Mg-Zr with

作　　者：孟亮 涂江平[1] 刘茂森[1] 

机构地区：[1]浙江大学材料科学与工程系,浙江杭州310027

出　　处：《浙江大学学报（自然科学版）》2000年第2期201-205,216,共6页

摘　　要：研究了 Fe,Si,Na,K杂质及 Ce微合金化对 A l-L i-Cu-Zr及 Al-L i-Mg-Zr合金内、外韧化水平的影响 .杂质降低了 Al-L i-Cu-Zr合金的内韧化水平 ,从而降低了其总体韧化水平 .由于 Al-L i-Cu-Zr合金中添加微量 Ce可明显提高材料的内韧化水平及抑制杂质的脆化作用 ,故可改善合金的断裂韧性 .对于Al-L i-Mg-Zr合金 。The effects of the impurities Fe,Si,Na,K and a rare earth addition Ce on the intrinsic and extrinsic toughening levels of the alloys Al\|Li\|Cu\|Zr and Al\|Li\|Mg\|Zr were investigated. The reduction in the toughening level for the alloy Al\|Li\|Cu\|Zr with more impurities is because the impurities impair the intrinsic toughening level. An improvement on the fracture toughness can be made by adding a fixed amount of Ce element to the alloy Al\|Li\|Cu\|Zr. The reason behind this is that Ce microalloying can not only enhance both the intrinsic toughening level and the extrinsic toughening level but suppress the embrittling behavior of the impurities. Ce microalloying can not produce beneficial effect on the toughening level for the alloy Al\|Li\|Mg\|Zr.

关 键 词：杂质 韧化 铝锂合金 铈 铝锂铜锆合金 

分 类 号：TG146.21[一般工业技术—材料科学与工程]