Tailoring the microstructure and mechanical properties of the final Al-Mn foils by different intermediate annealing process

作     者：Li Huang Guangjie Huang Yunchang Xin Lingfei Cao Xiaodong Wu Zhihong Jia Qilei Li Qing Liu 

作者机构：College of Materials Science and EngineeringChongqing University 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2017年第33卷第9期

页      面：961-970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：supported by the National Key Research and Development Program of China (No. 2016YFB0300901) the Fundamental Research Funds for the Central Universities (No. 106112015CDJXY130003) the National Natural Science Foundation of China (No. 51421001) 

主　　题：Al-Mn alloys Foil Annealing Recrystallization mechanism Size effect Mechanical property 

摘      要：In this work, two different intermediate annealing processes, single-step annealing（SSA, 530?C/15 h）and two-step annealing（TSA, 450?C/5 h + 530?C/15 h）, were used to tailor microstructure before coldrolling and annealing of the final twin-roll cast Al-Mn foils. The recrystallization behavior and mechanical properties during annealing of severely cold-rolled foils were systematically studied. Our results show that discontinuous recrystallization occurs in SSA-foils during annealing at 150–310?C, in contrast with continuous recrystallization in TSA-foils. The continuous recrystallization develops much finer grains（;.35 μm） in the TSA-foils than those by discontinuous recrystallization in the SSA-foils（;4.7 μm）. The texture components in cold-rolled TSA-foils hardly change（retained rolling-textures） after continuous recrystallization, while those in the cold-rolled SSA-foils mainly transform into a strong cube component{001} after discontinuous recrystallization. Finally, a maximized elongation to fracture of;3.9%was achieved in the TSA-foil, much higher than that of the SSA-counterparts,;.3%. The relationships between the microstructure and mechanical properties were discussed.