超声C扫描无损检测在变形加工W/Al复合材料微观组织结构分析中的应用研究  

Application of Ultrasonic C Scan Nondestructive Testing in Microstructure Analysis of W/Al Composite Materials by Deformation Processing

作　　者：张延微 毛昌辉[1] 杨剑[1] 梁秋实[1] 马书旺[1] 刘坤[1] 

机构地区：[1]北京有色金属研究总院先进电子材料研究所,北京100088

出　　处：《稀有金属》2017年第3期290-296,共7页Chinese Journal of Rare Metals

基　　金：北京有色金属研究总院创新基金项目资助

摘　　要：采用热等静压加工工艺制备了W/Al复合材料,采用超声C扫描(UTC-Scanning)无损检测技术和扫描电镜(SEM)研究了热等静压态材料与经过挤压、锻造变形加工工艺后的复合材料的微观组织结构。首先,利用C扫描对材料内部存在的偏聚组织进行定位,然后利用SEM对样品进行解剖观察分析。二者的实验结果表明,C扫描技术能够实现对W/Al复合材料内部偏聚组织的精确定位。研究表明热等静压态材料组织结构整体上较为均匀,但会在局部有主要成分为基体合金2024 Al的团簇状偏聚组织存在;挤压变形加工有利于均匀化W/Al复合材料,减少团簇状偏聚组织,但在材料内部出现沿挤压方向分布的条带状组织结构;锻造加工能够基本上消除材料中存在的团簇状偏聚组织结构,并减小条带状组织的宽度,使W/Al复合材料的组织结构更加均匀。W/Al composite materials were prepared by hot isostatic pressing technology. Ultrasonic C-scanning（ UTC-Scanning）nondestructive testing technique and scanning electron microscope（ SEM） were used to investigate the microstructure of the as-prepared W/Al composites materials by hot isostatic pressing,or after extruding and forging deformation processing. Firstly,the uniform microstructure was located by C-scanning,and then the uniform microstructure was anatomized by SEM. The results of both showed that uniform microstructure of W/Al composite could be located accurately by ultrasonic C-scanning technology. Testing results showed that the as-prepared W/Al composite materials prepared by hot isostatic pressing（ HIP） exhibited uniform microstructure,but there were some segregation structure existed in local areas; extrusion was helpful to uniform composite materials,which helped to reduce segregation part; meanwhile,after that some band structures occurred and were parallel to the direction of extrusion; forging process could basically eliminate segregation structure and decrease the width of band structure in composite materials,making composite material a uniform structure.

关 键 词：W/Al复合材料 热等静压 变形加工 微观组织结构 无损检测 

分 类 号：TB331[一般工业技术—材料科学与工程]