Interface analysis of 7B52 Al alloy laminated composite fabricated by hot-roll bonding  

7B52叠层铝合金轧制复合界面分析（英文）

作　　者：周古昕[1] 郎玉婧[1] 郝洁[1] 刘稳[1] 王生[1] 乔丽[1] 陈敏[1] 

机构地区：[1]中国兵器科学研究院宁波分院,宁波315103

出　　处：《Transactions of Nonferrous Metals Society of China》2016年第5期1269-1275,共7页中国有色金属学报（英文版）

基　　金：Project(51312JQ08)supported by the Pre-Research Foundation of China General Equipment Department;Project(NBPJ2013-4)supported by the Postdoctoral Science Foundation of Ningbo Branch of China Academy of Ordnance Science;Project(bsh1402073)supported by the Postdoctoral Science Foundation of Zhejiang Province,China;Project(2014A610051)supported by the Ningbo Natural Science Foundation of China

摘　　要：The bonding interface of 7B52 Al alloy laminated composite （ALC） fabricated by hot rolling was investigated using optical microscopy （OM）, transmission electron microscopy （TEM）, scanning electron microscopy （SEM）, ultrasonic flaw detection （UFD）, and bonding strength tests. The results show that metallurgical bonding is achieved at the interface after composite rolling. The TEM analysis and tensile tests indicate that the 7B52 ALC plate combines high strength of the hard individual layer and good toughness of the soft individual layer. However, UFD technology and SEM analysis prove that the defects （thick oxide films, acid washed residues, air, oil and coarse particles） existing in the bonding interface are harmful to the bonding strength. To sum up, the composite roiling process is suitable for 7B52 ALC plate, and the content and size of the defects should be controlled strictly. Advanced surface treatment of each individual layer would be beneficial to further improve the bonding quality.通过金相、透射电镜、扫描电镜、超声无损检测和结合强度测试,研究7B52叠层铝合金热轧复合的结合界面。结果表明:轧制复合能够使界面获得冶金结合。TEM分析和拉伸试验表明:7B52叠层铝合金板材是由高强度硬层材料和高韧性软层材料复合而成。然而,超声无损检测和SEM分析表明:结合界面处的缺陷(如厚氧化层、酸洗残留物、空气、油渍和粗大粒子等)不利于界面结合强度。总之,轧制复合工艺适用于7B52叠层铝合金板材,且应该严格控制缺陷的数量和尺寸。先进的单层板表面处理技术有利于进一步提升结合质量。

关 键 词：7B52 alurninium alloy laminated composite hot-roll bonding MICROSTRUCTURE interfacial analysis 

分 类 号：TG339[金属学及工艺—金属压力加工]