摘要
某型铝合金框使用不久后,在其表面发现裂纹。通过对铝合金框裂纹断口进行宏微观观察、能谱分析以及显微材料的组织分析,确定了其开裂的性质和原因。结果表明,裂纹断口上存在大量呈泥纹花样的氧化物和氯化物的腐蚀产物,铝合金框的开裂为应力腐蚀开裂。由于铝合金框内表面局部区域涂漆较薄或缺乏保护,使得该框在工作应力和外界介质的协同作用下产生应力腐蚀裂纹。需要加强对铝合金框内表面防护工艺的研究以降低破坏。
Cracks were found on aluminum alloy frame not long after application.The cracks were studied using macro and micro observation,EDS,and microstructure analysis methods.The results showed that there are a lot of oxide and chloride resulting from corrosion on the fracture surface;the fracture mode of the aluminum frame is stress-corrosion.The stress-corrosion cracks were caused by thin coat of paint or lacking of protection of local area on inner surface,and stress corrosion cracking was created by working stress and external environment.Improvement of inner surface prevention technology of aluminum alloy frame was suggested.
出处
《装备环境工程》
CAS
2011年第2期1-3,共3页
Equipment Environmental Engineering
关键词
铝合金框
裂纹
应力腐蚀
aluminum alloy frame
crack
stress-corrosion
