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The grain size and orientation dependence of geometrically necessary dislocations in polycrystalline aluminum during monotonic deformation: Relationship to mechanical behavior
Materials Science and Engineering: A ( IF 4.081 ) Pub Date : 2020-01-10 , DOI: 10.1016/j.msea.2020.138939
Shiqi Zhang; Wei Liu; Jifang Wan; R.D.K. Misra; Qiang Wang; Chao Wang

The evolution of geometrically necessary dislocations (GND) in aluminum was studied using high-resolution EBSD. Small grains had higher GND density than coarse grains and were most pronounced at a strain of ∼9.8%, due to GNDs were more homogeneously organized at strain >9.8%. Furthermore, <111> oriented grains with higher Taylor factor stored more GNDs than <100> grains.
更新日期:2020-01-11

 

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