Al_(63)Cu_(25)Mn_(12)准晶形核剂对铸态铝合金显微结构的影响  

Effect of Al_(63)Cu_(25)Mn_(12) quasi-nucleating agent on aluminium alloy microstructure

作　　者：石逸扬 王琛[1] 肖文豪[1] 艾延龄[1] 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083

出　　处：《金属热处理》2016年第9期43-48,共6页Heat Treatment of Metals

摘　　要：在纯铝中添加Al_(63)Cu_(25)Mn_(12)准晶熔炼出了Al-Cu-Mn合金,对铸态试样的显微组织和晶体结构进行了研究。结果表明,铸态共晶组织包含Al和在Al_2Cu相基础上形成的新相,其中共晶相中的Al晶粒的取向与相邻Al基体接近。共晶组织中的另外一个新相是在共晶Al相形成网格后才在其网格内结晶形成,其电子衍射花样特点表明,这个相是在无序Al_2Cu相的基础上,沿(110)面2倍周期有序形成的一种新相。Al-Cu-Mn alloys were smelted by adding Al63 Cu25 Mn12 quasicrystals in pure aluminum. Microstructure and crystal structure of cast specimens were studied. The results show that the as-cast eutectic structures contain Al and the new phase formed on the basis of Al2 Cu phase. The orientation of Al grain in the eutectic phase is close to Al matrix. Another new phase in eutectic phase should be formed after Al eutectic crystallization phase forming a grid within its grid. Based on Al2 Cu phase, this phase may be a new phase twice period ordered along the （110） planes.

关 键 词：AL-CU-MN合金 Al63Cu25Mn12准晶 晶体结构 

分 类 号：TG146.2[一般工业技术—材料科学与工程]