Precipitates and corrosion resistance of an Al-Zn-Mg-Cu-Zr plate with different percentage reduction per passes

作     者：Yu-Hao Liu Liang-Ming Yan Xiao-Hu Hou Dong-Nan Huang Jian-Bo Zhang Jian Shen 

作者机构：School of Materials Science and Engineering Inner Mongolia University of Technology Institute of Engineering and Research Jiangxi University of Science and Technology State Key Laboratory of Nonferrous Metals and ProcessesGeneral Research Institute for Nonferrous 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2018年第37卷第5期

页      面：381-387页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 

基　　金：financially supported by the Higher School Science Foundation of Inner Mongolia (No. NJZZ16082) National Natural Science Foundation of China (Nos. 51764043, 51461017 and 51364027) Science Program for Returned Chinese Scholars supported by Inner Mongolia and the Scientific and Technological Program of Innovation and Guidance of Inner Mongolia 

主　　题：7055 aluminum alloy Microstructure Rolling Corrosion resistance 

摘      要：7055 aluminum alloy plates with the same size were rolled by two processes： small percentage reduction per pass （PRPP） and large percentage reduction per pass, respectively. Meanwhile, the effect of PRPP on the precipitates and corrosion resistance of 7055 aluminum alloy plate was investigated. The mechanisms were analyzed and discussed by optical microscopy （OM）, transmission electron microscopy （TEM）, high-resolution transmission electron microscopy （HRTEM） and electron back-scattered diffraction （EBSD） technique. Large PRPP can improve the corrosion resistance. For the plate rolled by small PRPP, the main precipitate is guinier-preston （GP） zone and continuous grain boundary precipitates （GBPs）, while, for the plate rolled by large PRPP, the main precipitates are the GP zone and η precipitate, and the GBPs are discontinuous.