基于EBSD的喷射沉积7055铝合金单级固溶工艺研究
Single-stage Solution Process of Spray Deposited 7055 Aluminum Alloy Based on EBSD
周晓轩 1白朴存 1侯小虎 1马国喜 1赵学平 1熊培友2
作者信息
- 1. 内蒙古工业大学材料科学与工程学院,呼和浩特 010051
- 2. 上海交通大学机械与动力工程学院,上海 200240;滨州渤海活塞有限公司,滨州 256602
- 折叠
摘要
通过扫描电镜(SEM)、电子背散射衍射(EBSD)技术等测试方法,定量研究了单级固溶温度对喷射沉积7055铝合金第二相、晶粒尺寸、再结晶分数的影响.结果表明,挤压态合金中,第二相面积分数为10.3%、晶粒平均尺寸为2.5 μm、再结晶分数为57.5%;随着固溶温度升高,第二相逐渐回溶到基体中,第二相面积分数逐渐减小,晶粒平均尺寸和再结晶分数逐渐升高.经460℃×2 h固溶处理后第二相面积分数为0.73%、晶粒平均尺寸为3.2 μm、再结晶分数为76.8%;经470℃×2 h固溶处理后,第二相面积分数为0.57%、晶粒平均尺寸为3.8 μm、再结晶分数为78.9%;经480℃×2 h固溶处理后第二相面积分数为0.52%、晶粒平均尺寸为4.4 μm、再结晶分数为 80.4%.固溶处理工艺为 470℃×2 h时,合金中残留第二相面积分数和再结晶分数较小、晶粒尺寸较小,为最佳固溶处理工艺.
Abstract
Effects of single-stage solution temperature on the second phase,grain size and recrystallization fraction of spray deposited 7055 aluminum alloy were quantitatively investigated by scanning electron microscopy(SEM)and electron backscatter diffraction(EBSD).The results indicate that the second phase area is 10.3%,the average grain size is 2.5 μm,and the recrystallization fraction accounts for 57.5%in as-extruded alloy.With the increase of solution temperature,the second phase is gradually dissolved back into the matrix with decreasing proportion,and the average grain size and recrystallization fraction are gradually increased.After solution treatment at 460℃×2 h,the second phase area is 0.73%,the average grain size is 3.2 μm,and the recrystallization fraction is 76.8%.After solution treat-ment at 470℃×2 h,the second phase area is 0.57%,the average grain size is 3.8 μm,and the recrystallization frac-tion is 78.9%.After solution treatment at 480℃×2 h,the second phase area is 0.52%,the average grain size is 4.4 μm,and the recrystallization fraction is 80.4%.When the solution treatment process is 470℃×2 h,the proportion of residual second phase area and recrystallization fraction in the alloy are low with fine grain,which is the optimal solu-tion treatment process.
关键词
7055铝合金/单级固溶/EBSD/第二相/再结晶Key words
7055 Aluminum Alloy/Single-stage Solution/EBSD/Second Phase/Recrystallization引用本文复制引用
基金项目
国家自然科学基金(62264013)
内蒙古自治区科技重大专项(zdzx2018031)
内蒙古自治区自然科学基金(2023LHMS01013)
内蒙古自治区直属高校基本科研业务费项目(JY20220144)
出版年
2024
NETL
NSTL
万方数据