中间退火对2E12铝合金组织和性能的影响  

Effect of Interannealing on Microstructure and Properties of 2E12 Aluminum Alloy

作　　者：郑林峰[1] 陈忱[1] 曹瑶琴[1] 伊琳娜 ZHENG Linfeng;CHEN Chen;CAO Yaoqin;YI Linna(China Helicopter Research and Development Institute, Jingdezhen 333001, China;Beijing Institute of Aeronautical Materials, Beijing 10095, China)

机构地区：[1]中国直升机设计研究所,江西景德镇333001 [2]北京航空材料研究院,北京10095

出　　处：《直升机技术》2018年第2期43-46,共4页Helicopter Technique

摘　　要：通过对比分析2E12薄板冷轧后引入中间退火和未采用中间退火的板材显微组织以及力学性能测试结果,研究中间退火对板材的晶粒、织构以及力学性能的影响。结果表明,引入中间退火的板材晶粒较为粗大呈现不完全再结晶的嵌套组织,未采用中间退火的板材显微组织为细小等轴晶粒;采用中间退火和未采用中间退火的板材基本力学性能相当,但采用中间退火工艺的板材裂纹扩展速率较低;获取细小等轴晶粒增加强度和塑性的同时增加了相邻晶粒的取向差,不利于降低裂纹扩展速率。The effects of interanneling on the grain, texture and mechanical properties of 2E12 plate were studied by analyzing the microstructure with interanneling and without it as well as results of mechanical test. The results show that the grain with interanneling is bigger than that without inter- anneling, which appear incomplete recrystallization structure. The basic mechanical properties of both are almost the same, but the crack propagation rate with interanneling is lower than the counter- part. Increased strength, ductility as well as degree of orientation between contiguous grains were gained when getting small grains, which is bad for decreasing the crack propagation rate.

关 键 词：2E12 中间退火 显微组织 力学性能 裂纹扩展速率 

分 类 号：V216.36[航空宇航科学与技术—航空宇航推进理论与工程]