Strain-rate sensitivity of aluminum 2024-T6/TiB2 Composites and aluminum 2024-T6
Strain-rate sensitivities of 55-65vol.% aluminum 2024-T6/TiB2 composites and the corresponding aluminum 2024-T6 matrix were investigated using split Hopkinson pressure bar.Results showed that 55-65vol.% aluminum 2024-T6/TiB2 composites exhibited significant strain-rate sensitivities,which were three times higher than that of the aluminum 2024-T6 matrix.The strain-rate sensitivity of the aluminum 2024-T6 matrix composites rose obviously with reinforcement content increasing (up to 60%),which agreed with the previous researches.But it decreased as the ceramic reinforcement content reached 65%.The 55-65vol.% aluminum 2024-T6/TiB2 composites showed various fracture characteristics under dynamic loading.Shear instability was the predominated failure mechanism and local aluminum alloy matrix was softened/melted.
Composite materials Mechanical properties Dynamic compression Strain-rate sensitivity
D.Z. Zhu Q. Chen
School of Mechanical and Automobile Engineering,South China University of Technology,Guangzhou 510640,China
国内会议
北京
英文
102-108
2013-09-10（万方平台首次上网日期，不代表论文的发表时间）