Spall fracture of coarse-grained and ultrafine-grained aluminum under nanosecond relativistic high-current electron beam |
| |
| Authors: | E F Dudarev A B Markov A N Tabachenko G P Bakach S D Polevin V P Rotshtein N V Girsova |
| |
| Institution: | (1) V. D. Kuznetsov Siberian Physical Technical Institute at Tomsk State University, Tomsk, Russia;(2) Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia;(3) Institute of High Current Electronics of the Siberian Branch of the Russian Academy of Sciences, Tomsk, Russia |
| |
| Abstract: | The results of investigations of fracture behavior in coarse-grained and ultrafine-grained aluminum under the action of a
nanosecond relativistic high-current electron beam in a SINUS-7 accelerator and under conditions of quasi-static tensile loading
are reported. It is shown that for both types of deformation, irrespective of the grain size, the fracture is ductile both
in deformation and structural features. Based on the examination of the fracture surface, it is found out that under quasi-static
loading decohesion of coarse-grained and ultrafine-grained aluminum occurs through shear, and under spalling condition by
rupture. It is shown for both grain structures that the thickness of the separated layer increases with the irradiated specimen
thickness.
__________
Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 32–38, December, 2007. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
