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金晓,张国栋,赵彦芬,柳文波,薛飞.Al-Li合金弯曲过程中微观组织结构演变与应变集中的DIC/EBSD耦合分析[J].稀有金属材料与工程(英文),2019,48(3):716~720.[jinxiao,Zhang Guodong,ZhaoYanfeng,LiuWenbo and Xue Fei.A coupled DIC/EBSD analysis of the microstructure evolution and strain localization during bending in Al-Li alloy[J].Rare Metal Materials and Engineering,2019,48(3):716~720.]
A coupled DIC/EBSD analysis of the microstructure evolution and strain localization during bending in Al-Li alloy
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Received:October 11, 2017  Revised:January 16, 2019
DOI:
Key words: Al–Li alloy  deformation  microstructure  fracture
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目),国家重点基础研究发展计划(973计划)
Author NameAffiliation
jinxiao,Zhang Guodong,ZhaoYanfeng,LiuWenbo and Xue Fei  
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Abstract:
      The damage mechanism of commercial 2060 (T8) aluminum alloy during bending was studied in this work. The microstructure evolution and strain localization was collected by Electron Backscattered Diffraction (EBSD) and Digital Image Correlation (DIC) methods, respectively. The new method based on the dispersion distribution of copper powders was developed, which can be used to characterize the strain distribution and microstructure evolution of the same region simultaneously. The experimental results showed that macro shear band formed during bending and the crack grow along the macro shear band, the reason for this phenomenon can be attributed to the larger volume fraction of Small Angle Grain Boundary (SAGBs) formed in the region of macro shear band, since less energy was needed if the crack propagated along the direction of macro shear bands.