Effect of Temperature and Strain Rate on Deformation Mode and Crack Behavior of 7B52 Laminated Aluminum Alloy Under Impact Loading

Wenhui Liu; Ping Cao; Chenbing Zhao; Yufeng Song; Changping Tang

doi:10.1007/s12540-020-00853-z

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자료유형: 학술저널

저자정보: Wenhui Liu (Hunan University of Science and Technology) Ping Cao (Hunan University of Science and Technology) Chenbing Zhao (Hunan University of Science and Technology) Yufeng Song (Hunan University of Science and Technology) Changping Tang (Hunan University of Science and Technology)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.11

발행연도: 2021.11

수록면: 4,397 - 4,407 (11page)

DOI: 10.1007/s12540-020-00853-z

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The dynamic mechanical behaviors of 7B52 laminated aluminum alloy under different impact deformation conditions wereinvestigated using split Hopkinson pressure bar, optical microscopy, electron backscatter diffraction and transmission electronmicroscopy. The results show that the 7B52 laminated aluminum alloy displays positive strain rate sensitivity and negativetemperature sensitivity. Cracks are formed firstly at the interface between the 7A62 hard layer and the 7A01 middle layerunder a low strain rate of 2200 s?1. When the strain rate increases to 3500 s?1, the deformation shear band is firstly formed inthe 7A52 soft layer. The deformation shear band transformed to the transition shear band with the increase of strain rate, andthen crack initiated. Adiabatic shear bands and cracks are formed in both of the hard and soft layers when samples impactedat a high strain rate (5500 s?1). Most of the cracks and adiabatic shear bands are unable to penetrate the middle layer dueto the good toughness of the 7A01 alloy. The deformation of each layer of 7B52 laminated aluminum alloy becomes moreuniform when the temperature increases, which was attributed to the reduction of difference in strength among the threelayers and the coordinating effect of grain boundary on deformation.

#7B52 laminated aluminum alloy #Strain rate #Dynamic mechanical properties #Microstructure #Deformation mode

참고문헌 (37)

참고문헌 신청

T. Demir / 2008 / Mater. Des 29:2009

C. Mondal / 2011 / Int. J. Impact Eng 38:745~754

S. D. Liu / 2016 / Mater. Sci. Eng. A 677:203

P. K. Jena / 2019 / Procedia Struct. Integr 17:957

J. Jung / 2020 / Mater. Charact 159:110033

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