李旭东,穆志韬,刘治国,李玲.LY12CZ航空铝合金腐蚀疲劳断口研究[J].装备环境工程,2013,10(4):9-12,29. LI Xu-dong,MU Zhi-tao,LIU Zhi-guo,LI Ling.Corrosion Fatigue Fracture Analysis of LY12CZ Aluminum Alloy[J].Equipment Environmental Engineering,2013,10(4):9-12,29.
LY12CZ航空铝合金腐蚀疲劳断口研究
Corrosion Fatigue Fracture Analysis of LY12CZ Aluminum Alloy
投稿时间:2013-02-07  修订日期:2013-07-01
DOI:10.7643/issn.1672-9242.2013.04.003
中文关键词:  疲劳  铝合金  断口分析  扫描电子显微镜
英文关键词:fatigue  aluminum alloy  fracture analysis  SEM
基金项目:
作者单位
李旭东 海军航空工程学院青岛校区,山东青岛266041 
穆志韬 海军航空工程学院青岛校区,山东青岛266041 
刘治国 海军航空工程学院青岛校区,山东青岛266041 
李玲 海军航空工程学院青岛校区,山东青岛266041 
AuthorInstitution
LI Xu-dong Corrosion Fatigue Fracture Analysis of LY12CZ Aluminum AlloyQingdao Campus of Naval Aeronautical Academy,Qingdao266041,China 
MU Zhi-tao Corrosion Fatigue Fracture Analysis of LY12CZ Aluminum AlloyQingdao Campus of Naval Aeronautical Academy,Qingdao266041,China 
LIU Zhi-guo Corrosion Fatigue Fracture Analysis of LY12CZ Aluminum AlloyQingdao Campus of Naval Aeronautical Academy,Qingdao266041,China 
LI Ling Corrosion Fatigue Fracture Analysis of LY12CZ Aluminum AlloyQingdao Campus of Naval Aeronautical Academy,Qingdao266041,China 
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中文摘要:
      疲劳;铝合金;断口分析;扫描电子显微镜借助扫描电镜以及能谱分析技术对预腐蚀LY12CZ铝合金疲劳断口形貌进行了研究,分析了腐蚀疲劳断口形貌与合金中的Si,Mg等元素以及腐蚀损伤对断裂过程的影响。结果表明疲劳断口是以韧性为主的多源性断口。腐蚀坑使得材料局部力学性能退化,成为裂纹萌生源。合金化过程中控制合适的Mg,Si等强化相元素含量,能够使强度与塑性相匹配,从而提高材料的抗疲劳性能。
英文摘要:
      Fatigue fracture surface of AA LY12CZ with corrosion damage was studied using scanning electron microscope and energy spectrum analysis. The effect of fatigue fracture feature, alloy element Si and Mg, and the corrosion damage on the fracture process was analyzed. The results indicated that the fatigue fracture surface is tough fracture with multiple fatigue sources; pits introduced by corrosion damage weaken the material property, which serve as crack nucleation sites; proper hardening constituent element introduced during alloying process such as Si and Mg, will make strength and plasticity match, thus improve fatigue performance of materials.
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