7xxx铝合金等通道转角挤压研究进展  

Research progress of equal channel angular pressing of 7xxx aluminum alloy

作　　者：李健 何涛 杜向阳 ALEXEY Vereshchaka LI Jian;HE Tao;DU Xiang-yang;ALEXEY Vereshchaka(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 200336,China;Institute of Design and Technological Informatics of the Russian Academy of Sciences,Moscow 127994,Russia)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海200336 [2]俄罗斯科学院设计与技术信息学研究所,莫斯科127994

出　　处：《塑性工程学报》2024年第11期1-12,共12页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(52275350);上海工程技术大学国际合作科研平台建设项目(0301006)。

摘　　要：7xxx(Al-Zn-Mg-Cu)铝合金具有高比强度和耐腐蚀性,在航空航天和汽车工业中具有重要应用。等通道转角挤压(ECAP)技术因在不改变材料横截面尺寸的同时可通过反复变形产生超细晶组织,成为制备高强度铝合金典型工艺之一。综述了ECAP制备超细晶7xxx铝合金的相关研究进展,探讨了ECAP加工参数如挤压温度、次数、路径等对铝合金晶粒细化行为的影响;重点讨论了ECAP过程中铝合金微观组织结构变化及其对力学性能、耐腐蚀性能和耐磨性能的影响;并结合ECAP与其他强化工艺复合对微观组织和力学性能的影响,展望了超细晶高强度铝合金的研究方向。7xxx(Al-Zn-Mg-Cu)aluminum alloy has high specific strength and corrosion resistance,and has important applications in the aerospace and automotive industries.The equal channel angular pressing(ECAP)technique has become one of the typical processes for the preparation of high-strength aluminum alloys because it can produce ultrafine crystalline tissues through repeated deformation without changing the cross-sectional dimensions of the material.Related research progress of ECAP for the preparation of ultrafine grain 7xxx aluminum alloy was reviewed,and the influence of ECAP processing parameters,such as pressing temperature,times and route on the grain refinement behavior of aluminum alloy was discussed;the changes of microstructure of aluminum alloy in the process of ECAP and its influence on mechanical properties,corrosion resistance and abrasion resistance were disscussed emphatically;combining with the influence of ECAP compounded with other reinforcement processes on the microstructure and mechanical properties,the future reasearch direction of ultrafine grain high-strength aluminum alloys was prospected.

关 键 词：等通道转角挤压 7xxx铝合金 超细晶 力学性能 微观组织 

分 类 号：TG146.1[一般工业技术—材料科学与工程]