Effect of bimodal microstructure on texture evolution and mechanical properties of 1050 Al alloy processed through severe plastic deformation and subsequent annealing
Effect of bimodal microstructure on texture evolution and mechanical properties of 1050 Al alloy processed through severe plastic deformation and subsequent annealing
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DOI：
10.1016/j.msea.2021.141580
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发表时间：
2021-06-16
期刊：
影响因子：
6.4
通讯作者：
Toroghinejad, Mohammad Reza
中科院分区：
文献类型：
--
作者：
Hosseiny, Niloofar;Shabani, Ali;Toroghinejad, Mohammad Reza
在这项研究中，铝板通过8个循环的累积轧制结合（ARB），然后，在300摄氏度下退火不同的时间段，以保持最佳的退火工艺形成的双峰微观结构。采用光学显微镜（OM）、X射线衍射（XRD）、硬度和单轴拉伸试验研究了显微组织、织构和力学性能的变化。显微组织观察表明，再结晶晶粒形成后10秒的退火，然而，恢复后1秒，由于高堆垛层错能（SFE）的铝。900 s后观察到完全再结晶的显微组织。在3600 s后获得双峰晶粒尺寸，并且最大2%晶粒的平均尺寸与平均晶粒尺寸的比率（dmax/ d d d比率为3）是这种现象的主要原因。
In this study, aluminium sheets were processed through 8 cycles of accumulative roll bonding (ARB), and then, were annealed at 300 degrees C for different time periods to maintain the optimum annealing process for the formation of bimodal microstructure. Variations in microstructure, texture, and mechanical properties were studied using optical microscopy (OM), X-Ray diffraction (XRD), and hardness and uniaxial tensile tests. Microstructural observations showed that recrystallized grains formed after 10 s of annealing; however, recovery occurred after 1 s due to the high stacking fault energy (SFE) of aluminium. Fully recrystallized microstructure was seen after 900 s. A bimodal grain size was achieved after 3600 s and the ratio of the average size of the largest 2% grains to mean grain size (dmax/ d d d ratio of 3 was the main reason for this phenomenon.