Orientation dependence of shock induced dislocations in tantalum single crystals

Electron Microscopy and Analysis Group Conference 2013

Pang, B.^1 ; Jones, I.^1 ; Chiu, Y.^1 ; Millett, J.^2 ; Whiteman, G.^2 ; Bourne, N.^2

School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, United Kingdom^1

AWE, Aldermaston, Reading, Berkshire RG7 4PR, United Kingdom^2

关键词: Dislocation generation;    One dimensional strains;    Orientation dependence;    Peak pressure;    Planar shock waves;    Release waves;    Shock induced;    Single-crystalline;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/522/1/012029/pdf
DOI  :  10.1088/1742-6596/522/1/012029

来源: IOP

【 摘 要 】

A planar shock wave with a peak pressure of 6.2 GPa and duration of 1.7 μs followed by a lateral release wave generates profuse dislocations in single crystalline tantalum. Three orientations [100], [110], [111] were tested to examine the orientation dependence of the dislocation generation. The dislocations were characterised by transmission electron microscopy. The Burgers vectors and morphology of the primary dislocations in the specimens with different orientations showed a distinct orientation dependence and will be discussed in light of the model of slip behaviour in one-dimensional strain of C.S. Smith [1].