材料科学
电子背散射衍射
微观结构
动态再结晶
搅拌摩擦加工
陶瓷
再结晶(地质)
铜
冶金
粒度
纹理(宇宙学)
复合材料
累积滚焊
热加工
地质学
人工智能
古生物学
图像(数学)
计算机科学
作者
Akbar Heidarzadeh,Hesam Pouraliakbar,S. Mahdavi,Mohammad Reza Jandaghi
标识
DOI:10.1016/j.ceramint.2017.11.080
摘要
In this study, the effect of ceramic nanoparticles addition on the microstructure and texture of friction stir processed (FSP) copper has been investigated. For this purpose, two pure copper plates with and without Al2O3 nanoparticles were FSPed at rotational speed of 800 rpm and traverse speed of 100 mm min−1. Electron back scattered diffraction (EBSD) technique was employed in order to study the microstructure and texture of the fabricated samples. Based on the obtained results, considerable grain refinement by dynamic recrystallization (DRX) mechanism was observed in both specimens. However, Al2O3 inset led to evolution of ultrafine grained (UFG) structure with an average grain size of 0.7 µm. In addition, Al2O3 addition caused formation of lower twin boundaries and stronger texture components compared with the sample without ceramic reinforcements. The presence of nanoparticles increased the proportion of the continuous DRX mechanism (CDRX) compared to the discontinuous mechanism (DDRX) during grain structure formation.
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