RECOVERING THE FULL DISLOCATION TENSOR FROM HIGH-RESOLUTION EBSD MICROSCOPY

摘要：

A novel stereological method is reported which infers experimentally inaccessible components of the Nye geometrically necessary dislocation density tensor.It is possible to measure five of nine components of the Nye tensor by high-resolution electron backscatter diffraction (HR-EBSD),but electron-opacity of metals obscures the remaining four components.This paper illustrates that it is possible to use equilibrium equations in connection with the known (measured) strain field of dislocations to infer the four unknown dislocation density components.Once the full Nye tensor is obtained,it can be transformed into a crystal coordinate frame and interpreted in a physical sense.

关键词： EBSD,Nye,Dislocation Density,HR-EBSD

作者: Thomas Hardin Brent L.Adams David T.Fullwood

作者单位: Department of Mechanical Engineering,Brigham Young University,Provo,UT 84602,USA

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 169-177

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）