7×××系铝合金应力腐蚀开裂研究现状  

Review of the stress corrosion cracking of 7××× series Al alloys

作　　者：王建军 查小琴[2,3] 郑国华 WANG Jian-jun;ZHA Xiao-qin;ZHENG Guo-hua(CRRC Qingdao Sifang Co.,Ltd.,Qingdao 266111,China;CSIC 725 Institute,Luoyang 471023,China;Henan Key Laberatory of Structural Materials and Applications of Ship and Marine Engineering Equipment School of Materials Science and Engineering Henan University of Science and Technology,Luoyang 471023,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司,山东青岛266111 [2]中国船舶重工集团公司第七二五研究所,河南洛阳471023 [3]河南省船舶及海工设备结构材料技术与应用重点实验室,河南洛阳471023

出　　处：《轻合金加工技术》2020年第4期9-15,37,共8页Light Alloy Fabrication Technology

摘　　要：7×××系铝合金由于具有高的比强度、断裂韧性和抗疲劳能力,被广泛应用于航空航天、轨道交通以及国防领域.但由于其合金化程度较高,时效过程中析出行为复杂,区域组织差异显著,因此对应力腐蚀开裂表现出高的敏感性.从应力腐蚀机制,合金成分、微观组织、环境介质等对7×××系铝合金应力腐蚀开裂影响的研究现状进行了较全面的评述,并在此基础上提出了7×××系铝合金应力腐蚀开裂应重点关注的研究内容和方向,为进一步拓展7×××系铝合金的工程应用领域提供参考.7×××series Al alloys are widely used in aerospace,rail transit and national defense fields by virtue of their high specific strength,fracture toughness and fatigue resistance.However,the precipitation behavior of 7×××series Al alloy is intricate due to the high alloying degree which leads to remarkable localized microstructure difference,so that 7××× series Al alloys exhibit high sensitivity to stress corrosion cracking(SCC).This paper provides a comprehensive review of the effect of corrosion mechanism,alloy composition,microstructure and environment on SCC behavior of 7×××series alloys,and suggests some research interests deserving significant attention.In addition,we provide reference for the expansion of application of 7×××series Al alloys in engineering fields.

关 键 词：7×××系铝合金 应力腐蚀开裂 合金成分 微观组织 环境介质 

分 类 号：TG146.21[一般工业技术—材料科学与工程]