Three-Dimensional Characterization of Spalled Al5083 by Micro CT and In-Situ Femtosecond Laser - FIB

18th International Conference on Textures of Materials

材料科学;物理学

Sano, T.^1 ; Ligda, J.^1 ; Walter, T.^1 ; Williams, C.^1

U.S. Army Research Laboratory, Aberdeen Proving Ground

21005-5066, United States^1

关键词: 3D characterization;    Characterization methods;    Crystallographic orientations;    Dimensional characterization;    Electron back-scattered diffraction;    Equal channel angular;    Extruded aluminum;    Region of interest;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/375/1/012033/pdf
DOI  :  10.1088/1757-899X/375/1/012033

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Spall cracks were formed in an equal channel angular extruded aluminum 5083 sample shock loaded to 1.45 GPa. A combined 3D characterization method using micro x-ray computed tomography (micro-CT) and in-situ femtosecond laser serial sectioning in the focused ion beam was used to characterize these spall cracks. The benefit of using both techniques lies in the ability to characterize the microstructure and spall cracks at multiple length-scales. The micro-CT characterization method is applied to non-destructively analyze the spall cracks at a higher targeted length-scale, and destructively explore the microstructure at a lower length-scale using the in-situ method. The femtosecond laser milling in the focused ion beam (FIB) in-situ method also allows for electron backscattered diffraction for crystallographic orientation determination. This paper describes the development of using both methods for 3D characterization of a single region of interest.