7B04铝合金固定下接耳开裂原因分析  

The Crack Cause Analysis of 7B04 Aluminum Alloy under Fixed Lug

作　　者：于妍妍 臧旭 宋体杰 赵政鑫 康凯[1] 李辉[3] 刘恩泽[3] YU Yan-yan;ZANG Xu;SONG Ti-jie;ZHAO Zheng-xin;KANG Kai;LI Hui;LIU En-ze(AVIC Shenyang Aircraft Corporation,Shenyang 110850,China;The Military Representative Bureau of the Air Force Equipment Department Stationed in the First Military Representative Office in Shenyang,Shenyang 110850,China;The Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China)

机构地区：[1]沈阳飞机工业(集团)有限公司,辽宁沈阳110850 [2]空军装备部驻沈阳地区军事代表局驻沈阳地区第一军事代表室,辽宁沈阳110850 [3]中国科学院金属研究所,辽宁沈阳110016

出　　处：《有色矿冶》2023年第4期41-43,48,共4页Non-Ferrous Mining and Metallurgy

摘　　要：采用体式显微镜、扫描电镜、显微硬度仪等设备分析了7B04铝合金飞机襟副翼操纵摇臂固定下接耳的断口微观组织形貌,研究发现7B04合金制备飞机襟副翼操纵摇臂固定下接耳的开裂为疲劳断裂,裂纹源于耳孔底面的边缘。The fracture surface microstructure of the fixed lug of the aircraft flapper aileron control rocker made of 7B04 alloy was analyzed using equipment such as optical microscopy,scanning electron microscopy,and microhardness tester.It was found that the cracking of the fixed lug of the aircraft flapper aileron control rocker made of 7B04 alloy was a fatigue fracture,and the crack origi‐nated from the edge of the ear hole surface.

关 键 词：铝合金 微观组织 疲劳断裂 

分 类 号：V252.2[一般工业技术—材料科学与工程]