摘要
为了确定单级时效制度对2A97铝锂合金组织、力学性能和腐蚀性能的影响,采用室温拉伸、晶间腐蚀、剥落腐蚀、电化学腐蚀和TEM观察等方法,对不同单级时效处理后的合金组织和性能进行表征测试。结果表明:随着时效温度升高,2A97铝锂合金达到最佳力学性能所需时间缩短。随时效温度升高、时效时间延长,合金的抗腐蚀性能下降。165℃时效60 h后,合金的抗拉强度、屈服强度和伸长率分别达到549 MPa、484 MPa和8.8%,晶间腐蚀等级为4级,剥落腐蚀评级EC。
In order to determine the effects of single-stage aging regime on the microstructures, mechanical properties and corrosion properties of 2A97 Al-Li alloys, the methods of room temperature tensile, intergranular corrosion,exfoliation corrosion, electrochemical corrosion and TEM observation were used to investigate the microstructure,mechanical properties and corrosion properties of 2A97 Al-Li alloys after different single-stage aging treatments. The alloys were tested and characterized. The results show that with increasing the aging temperature, the aging time for 2A97 Al-Li alloys to obtain the best mechanical properties decreases. With increasing the aging temperature and aging time, the corrosion resistance of the alloys decreases. After aging at 165 ℃ for 60 h, the tensile strength, yield strength and elongation of the alloys are 549 MPa, 484 MPa, and 8.8%, respectively, the intergranular corrosion is grade 4, and the exfoliation corrosion grade is EC.
作者
游任轩
马运柱
汤娅
赵心阅
刘文胜
YOU Renxuan;MA Yunzhu;TANG Ya;ZHAO Xinyue;LIU Wensheng(Powder Metallurgy Research Institute,Central South University,Changsha 410083,China)
出处
《粉末冶金材料科学与工程》
2022年第4期398-408,共11页
Materials Science and Engineering of Powder Metallurgy
基金
十三五装备预研共用技术项目(2021-JXXQ-XX-01XX)。
关键词
2A97铝锂合金
单级时效
显微组织
力学性能
腐蚀性能
2A97 Al-Li alloys
single-stage aging
microstructure
mechanical property
corrosion property