预变形对Al-Cu-Mg-Ag合金时效组织及性能的影响  

Effect of pre-deformation on aged microstructure and properties of Al-Cu-Mg-Ag alloy

作　　者：张姿 王瑞红[1] ZHANG Zi;WANG Ruihong(Faculty of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China)

机构地区：[1]西安理工大学材料科学与工程学院,陕西西安710048

出　　处：《西安理工大学学报》2023年第4期506-512,共7页Journal of Xi'an University of Technology

基　　金：国家自然科学基金面上项目(52071260)。

摘　　要：为分析预变形对Al-Cu-Mg-Ag合金时效过程中析出相的影响,本文利用Digital Micrograph软件对透射电子显微镜(TEM)观察的析出相直径尺寸及数量密度进行了定量统计,结果表明,20%预变形时效态合金析出相密度增加,直径减少。为探究不同预变形对时效态Al-Cu-Mg-Ag合金力学性能的影响,利用维氏硬度计测得四种变形量(0%、10%、20%、30%)预变形样品在185℃时效0~24h的硬度,结果表明,预变形提高了合金硬度,且当变形量为30%时合金峰值硬度最高(153HV)。为探究不同预变形对T6态Al-Cu-Mg-Ag合金耐蚀性能的影响,本文进行了循环极化曲线测试和晶间腐蚀实验,结果表明,Al-Cu-Mg-Ag合金存在最佳变形量预变形(20%)使得耐蚀性能最佳。In order to analyze the influence of pre-deformation on the precipitated phase during the aging process of Al-Cu-Mg-Ag alloy,the diameter size and quantity density of the precipitated phase observed by TEM were quantitatively calculated by the Digital Micrograph software,and the results showed that the precipitated phase density of 20%pre-deformation aging alloy increased and that the diameter size decreased.In order to explore the influence of different pre-deformations on the mechanical properties of Al-Cu-Mg-Ag alloy in the aging state,the hardness of four deformation samples(0%,10%,20%,30%)was measured by the Vickers hardness tester at 185°C aging 0~24h,and the results showed that the pre-deformation increased the hardness of the alloy,and that the peak hardness of the alloy was the highest(153HV)when the deformation was 30%.In order to explore the influence of different pre-deformations on the corrosion resistance of Al-Cu-Mg-Ag alloy in T6 state,the cyclic polarization curve test and intergranular corrosion experiment are carried out,and the results show that the best deformation pre-deformation(20%)of Al-Cu-Mg-Ag alloy makes the corrosion resistance the best.

关 键 词：AL-CU-MG-AG合金 预变形 耐蚀性能 

分 类 号：TG146[一般工业技术—材料科学与工程]