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

fYear

2012

fDate

24-26 Oct. 2012

Firstpage

175

Lastpage

177

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microsystems, Packaging, Assembly and Circuits Technology Conference (IMPACT), 2012 7th International

Conference_Location

Taipei

ISSN

2150-5934

Print_ISBN

978-1-4673-1635-4

Electronic_ISBN

2150-5934

Type

conf

DOI

10.1109/IMPACT.2012.6420254

Filename

6420254