超细晶Al-Cu合金的力学性能与点腐蚀行为  

Mechanical Properties and Pitting Corrosion Behavior of Ultrafine-grained Al-Cu Alloy

作　　者：刘晓红[1] 徐亮[1] 严伟林[1] LIU Xiaohong;XU Liang;YAN Weilin(Key Laboratory of Modem Design and Advanced Manufacturing of Guangxi Colleges and Universities,Guangxi University,Nanning 530004,China)

机构地区：[1]广西大学广西高校现代设计与先进制造重点实验室

出　　处：《热加工工艺》2018年第16期37-40,共4页Hot Working Technology

基　　金：国家自然科学基金地区科学基金项目(51061005);广西高校现代设计与先进制造重点实验室主任课题项目(GXXD16YB-01);广西自然科学基金项目(2014GXNSFDA-118033);南宁市科学研究与技术开发计划项目(20144223)

摘　　要：对2A80铝合金进行多向锻造加时效处理。研究具有高强度和塑性的超细晶Al-Cu合金的显微组织和点腐蚀行为之间的关系。结果表明,多向锻造加时效处理使2A80铝合金的组织显著细化且晶粒中弥散分布着超细的第二相微粒,位错变形和抵抗位错滑移变形的能力得到增强,从而使试样的强度和塑性得到提高。第二相微粒的析出有助于增强抗点腐蚀性能。2 A80 aluminum alloy was processed by multi-directional forging and aging treatment. The relationship between microstructure and pitting corrosion behavior of ultrafine grained Al-Cu alloy with high strength and ductility was investigated. The results show that the microstructure of 2 A80 aluminum alloy after multi-directional forging and aging is greatly refined and the ultrafine second phase particles are dispersively distributed in the grains, and then the dislocation deformation and the ability of resisting the dislocation slip page improve, which can increase the strength and ductility of the samples. The increase of high pitting corrosion resistance attributes to the precipitation of the second phase particles.

关 键 词：铝合金 多向锻造 时效处理 点腐蚀 

分 类 号：TG146.21[一般工业技术—材料科学与工程]