Determination of dislocation boundary spacings from length per area measurements in EBSD data sets  

作　　者：GODFREY Andrew 

机构地区：[1]Laboratory of Advanced Material of Dept.Materials Science and Engineering,Tsinghua University,Beijing 100084,P.R.China

出　　处：《中国体视学与图像分析》2006年第3期157-162,共6页Chinese Journal of Stereology and Image Analysis

基　　金：Supported by the National Natural Science Foundation of China(No.50371041 and No.50571049)

摘　　要：In this paper we examine the effect on the determination of boundary length per unit area of the stepped nature of boundaries in orientation maps derived from electron back-scatter diffraction data.A correction factor is derived for isotropic microstructures.Two measures based on length per unit area for the determination of the cross-link boundary spacing in high strain deformation microstructures are then compared.A geometric method based on subtraction of the contribution to the length per area of the lamellar boundaries gives the best results,though in some cases a method based on boundary misorientation angles may be preferred.In this paper we examine the effect on the determination of boundary length per unit area of the stepped nature of boundaries in orientation maps derived from electron back-scatter diffraction data. A correction factor is derived for isotropic microstructures. Two measures based on length per unit area for the determination of the cross-link boundary spacing in high strain deformation microstructures are then compared. A geometric method based on subtraction of the contribution to the length per area of the lamellar boundaries gives the best results, though in some cases a method based on boundary misorientation angles may be preferred.

关 键 词：deformation microstructure EBSD/EBSP dislocation boundary 

分 类 号：O651[理学—分析化学]