材料科学
方向错误
微观结构
电子背散射衍射
纹理(宇宙学)
粒度
再结晶(地质)
衍射
粘塑性
镁
应变率
场发射枪
冶金
复合材料
扫描电子显微镜
热力学
晶界
光学
物理
古生物学
本构方程
有限元法
生物
人工智能
计算机科学
图像(数学)
作者
Benoît Beausir,Samir Kumar Biswas,Dong Ik Kim,László Tóth,Satyam Suwas
出处
期刊:Acta Materialia
[Elsevier]
日期:2009-10-01
卷期号:57 (17): 5061-5077
被引量:127
标识
DOI:10.1016/j.actamat.2009.07.008
摘要
Asymmetric rolling of commercially pure magnesium was carried out at three different temperatures: room temperature, 200 °C and 350 °C. Systematic analysis of microstructures, grain size distributions, texture and misorientation distributions were performed using electron backscattered diffraction in a field emission gun scanning electron microscope. The results were compared with conventional (symmetric) rolling carried out under the same conditions of temperature and strain rate. Simulations of deformation texture evolution were performed using the viscoplastic self-consistent polycrystal plasticity model. The main trends of texture evolution are faithfully reproduced by the simulations for the tests at room temperature. The deviations that appear for the textures obtained at high temperature can be explained by the occurrence of dynamic recrystallization. Finally, the mechanisms of texture evolution in magnesium during asymmetric and symmetric rolling are explained with the help of ideal orientations, grain velocity fields and divergence maps displayed in orientation space.
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