Mechanical properties and peculiar features of energy dissipation of ultrafine-grained aluminum alloys under dynamic deformation

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Petrova, A.^1 ; Brodova, I.^1 ; Shorokhov, E.^2 ; Plekhov, O.^3 ; Naimark, O.^3

Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, S. Kovalevskaya Str. 18, Ekaterinburg, 620990, Russia^1

Russian Federal Nuclear Center, Zababakhin All-Russian Research Institute of Technical Physics, PO Box 245, Snezhinsk, Chelyabinsk Region 456770, Russia^2

Institute of Continuous Media Mechanics, Ural Branch, Russian Academy of Sciences, Ac. Korolev Str. 1, Perm, 614013, Russia^3

关键词: Deformation process;    Dynamic compression tests;    Dynamic deformation;    Dynamic yield strengths;    Energy dissipation ability;    Strain rate dependency;    Surface temperatures;    Ultrafine grained alloys;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012146/pdf
DOI  :  10.1088/1757-899X/63/1/012146

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This paper presents experimental results on the thermodynamics of deformation process and mechanical behavior of the ultrafine grained aluminum alloys under dynamic compression. Dynamic compression tests were performed on a Hopkinson-Kolsky split bar at the strain rate of 103 s'1 with simultaneously recording the surface temperature of samples by an infrared camera. Energy dissipation ability was determined for ultrafine-grained alloys. An inverse strain rate dependency of dynamic yield strength was observed in the ultrafine-grained Al-Zn-Mg-Cu alloy (A7075).