5083铝合金组织中第二相的形态及微观结构  

Morphology and microstructure of second-phases in 5083 aluminum alloy

作　　者：肖晓玲 刘宏伟 詹浩 唐维学 XIAO Xiao-ling;LIU Hong-wei;ZHAN Hao;TANG Wei-xue(Guangdong Industrial Analysis and Testing Center,Guangzhou 510650,China;Australian Centre for Microscopy&Microanalysis,The University of Sydney,Sydney 2006,Australia)

机构地区：[1]广东省工业分析检测中心,广州510650 [2]Australian Centre for Microscopy & Microanalysis,The University of Sydney

出　　处：《中国有色金属学报》2018年第12期2441-2449,共9页The Chinese Journal of Nonferrous Metals

基　　金：中山市科技局资助项目(2017GIFC0002);广东省科学院创新能力建设项目(2017GDASCX-0114)~~

摘　　要：应用透射电镜研究国内外5083铝合金H116态退火组织中第二相的形态和微观结构,观察到三类不同形态和晶体结构的第二相。第一类为具有单斜结构或伪四方结构的板条状η-Al_5(Mn,Cr)相,国产5083铝合金组织中该相含量较多;第二类为具有正交结构的棒状Al_6(Mn,Fe)相,国产和国外的5083铝合金组织中该相均可见;第三类为具有单斜结构的球状或不规则形状θ-Al_(45)(Mn,Cr)_7相,国外5083铝合金组织中该相含量较多,此类单斜结构的θ-Al_(45)(Mn,Cr)7相易产生(111)或(111)孪晶和(110)共轭面。同时,利用Al-Cr二元相图和Al-Mn-Cr三元相图解释了5083铝合金H116态退火组织中第二相的生成机制以及它们的形态对加工性能的影响。The morphology and microstructure of the second-phases in a 5083 aluminum alloy with H116 temper condition from both domestic and foreign were investigated by TEM.Three types of the second-phase were observed.The 1st,or lath-shaped style isη-Al5(Mn,Cr)phase with monoclinic or pesuo-tetragonal structure,and is mostly seen in 5083 alloy under H116 temper condition from domestic.The 2nd or rod-shaped style is Al6(Mn,Fe)phase with orthorhombic structure and is observed in both domestic and foreign 5083 aluminum alloy,and the 3rd style is monoclinic Al45(Mn,Cr)7 phase with twin-structure,which is seen only in foreign alloy.The formation of the secondphases in 5083 aluminum alloy was discussed based on Al-Cr binary phase diagram or Al-Mn-Cr triple phase diagram.

关 键 词：5083铝合金 H116加工态 透射电镜 第二相 形态 结构 

分 类 号：TG146.22[一般工业技术—材料科学与工程]