Title :
Scaling properties of fracture surfaces of dynamically loaded aluminium alloy specimens
Author :
Lyapunova, E. ; Chudinov, V. ; Sokovikov, M. ; Uvarov, S. ; Naimark, O. ; Yeong-Maw Hwang ; Alexandrov, S.
Author_Institution :
Inst. of Continuous Media Mech., Perm, Russia
Abstract :
Plastic strain localization and fracture of dynamically loaded metallic samples occurred during plug formation are investigated. These processes are closely related to the instability of plastic flow and can be attributed to structural-scaling transitions in mesodefect ensembles. The multiscale nature of defect structure allows one to use the fractal concept for quantitative analysis of both the fracture surface and the inner structure of deformed material. The scaling properties of fracture surfaces are established in terms of the roughness index (Hurst exponent) as the characteristics of strain localization and fracture.
Keywords :
aluminium alloys; deformation; fracture; mechanical stability; metallurgy; metals; plastic flow; surface roughness; Hurst exponent; defect structure; deformed material; dynamically loaded metallic sample; fractal concept; fracture surface; mesodefect ensemble; plastic flow instability; plastic strain localization; plug formation; roughness index; scaling properties; structural-scaling transition; Fractals; Materials; Rough surfaces; Surface cracks; Surface morphology; Surface roughness; Surface treatment;
Conference_Titel :
Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT), 2012 7th International
Conference_Location :
Taipei
Print_ISBN :
978-1-4673-1635-4
Electronic_ISBN :
2150-5934
DOI :
10.1109/IMPACT.2012.6420254
