哈氏合金X电子束表面处理微观组织研究  

Microstructure of Hastelloy X Modified by High-Current Pulsed Electron Beam

作　　者：邹慧 唐晓薇[2] Zou Hui;Tang Xiaowei(Tianjin Key Laboratory of Civil Aircraft Airworthiness and Maintenance,Tianjin 300300,China;Civil Aviation University of China,Tianjin 300300,China)

机构地区：[1]天津市民用航空器适航与维修重点实验室,天津300300 [2]中国民航大学,天津300300

出　　处：《稀有金属材料与工程》2020年第8期2718-2723,共6页Rare Metal Materials and Engineering

基　　金：中央高校基本科研业务费专项资金项目(3122016L014)。

摘　　要：利用强流脉冲电子束(HCPEB)轰击哈氏合金X表面对其进行改性,并对其显微组织进行分析和讨论。利用扫描电子显微镜(SEM)观察腐蚀后试样形貌,利用电子背散射衍射(EBSD)观察未腐蚀试样形貌。结果表明:从扫描电镜照片可以看到,未轰击试样晶界被腐蚀,轰击后试样表面存在约为2μm的重熔层,腐蚀程度减轻,晶界处出现颗粒状碳化物;从EBSD结果可知,轰击5次试样晶粒尺寸最小,轰击5次和10次试样晶粒取向性更好,多为[101]和[110]。实验表明强流脉冲电子束轰击能够使哈氏合金X表面出现重熔层,并改变其晶粒大小和晶体取向。Hastelloy X surface was modified by high-current pulsed electron beam(HCPEB)bombardment and its microstructure was analyzed.The sample after corrosion was observed by scanning electron microscope(SEM),and the unetched sample was observed by electron backscattered diffraction(EBSD).The results show that the grain boundary of the untreated sample is corroded from the SEM micro-morphology.After the bombardment,there is a remelted layer of about 2μm in thickness on the surface of the sample.The sample possesses good corrosion resistance and granular carbides appear at the grain boundary.It can be seen that the grain size is the smallest for the sample with 5 times bombardment,and the grain orientation is better for the sample with 5 and 10 times bombardment,mostly[101]and[110].Experiments show that high-current pulsed electron beam bombardment can cause the remelted layer on the surface of Hastelloy X and change the grain size and crystal orientation.

关 键 词：强流脉冲电子束 哈氏合金 微观形貌 晶粒尺寸 织构 

分 类 号：TG146.15[一般工业技术—材料科学与工程] TG174.442[金属学及工艺—金属材料]