Effects of second-phase boron particles on impact response of aluminum

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:793

Article

Cheng, J. C.^1,2  Li, H. Y.^1,2  Li, C.³  Xiao, X. H.⁴  Zhong, Z. Y.^1,2  Lu, L.^1,2  Luo, S. N.^1,2 

[1] Southwest Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Sichuan, Peoples R China

[2] Southwest Jiaotong Univ, Inst Mat Dynam, Chengdu 610031, Sichuan, Peoples R China

[3] Peac Inst Multiscale Sci, Chengdu 610031, Sichuan, Peoples R China

[4] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

关键词: Boron particle;    Spallation;    Impact;    Aluminum;   

DOI  :  10.1016/j.msea.2020.139805

来源: Elsevier

【 摘 要 】

The influence of second-phase boron particles (up to 0.15 wt%) on impact response of aluminum is investigated under high strain rate gas gun loading. The Hugoniot elastic limit (similar to 0.11 GPa) shows a negligible dependence on boron particle content up to 0.15 wt%. The second-phase particles reduce considerably spall strength of aluminum, and such reduction is more pronounced at high boron content. Spall strength undergoes a slight decrease at high impact velocities. Scanning electron microscopy and synchrotron X-ray computed tomography analyses indicate a competition between microvoid nucleation and microvoid growth. The damage features and spall strength characteristics can be attributed to the weak particle-matrix interface.

【 授权许可】

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