Microstructural Characterization of &lt;i&gt;In Situ&lt;/i&gt; Reaction TiB&lt;sub&gt;2&lt;/sub&gt;/Zn-30Al-1Cu Composites Prepared by Spray Deposition Process

Wang, Feng; Zhang, Qiang; Xiong, Baiqing; Zhang, Yong-An; Liu, Hong Wei; Li, Zhi Hui; Li, Xi Wu

doi:10.4028/www.scientific.net/amr.1015.688

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…SiCp/Al composites have been extensively applied in the automobile, aerospace, defense industries and other industries for their prominent properties in both physical and mechanical performance (e.g., light-weight, high wear resistance, high stiffness, excellent strength, good thermal stability and low price) [1][2][3][4][5][6][7]. Among considerable additive manufacturing technologies, spray-deposition is considered an advanced production technology for forming fine structure and fabricating high density metallic components [1,[8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A modified Johnson-Cook model for dynamic behavior of spray-deposition 17 vol.% SiCp/7055Al composites at high strain rates

Tang

Wang

Jin

et al. 2020

Mater. Res. Express

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In this study, the dynamic impact tests of spray-deposited 17 vol% SiCp/7055Al composites at various strain rates were performed with a Split Hopkinson Pressure Bar (SHPB). In these tests, the strain rate was 392 s −1 -2002 s −1 , and the temperature was 293 K-623 K. Subsequently, the Johnson-Cook (JC) was used to describe the flow behaviors under high speed impact deformation, and its effectiveness was assessed. Results show that the stress values predicted by the JC model could be inconsistent with the experimental ones. A modified JC constitutive model of 17 vol% SiCp/7055Al composites was developed by modifying the strain rate hardening term and considering coupling effects of strain, temperature and strain rate. According to the comparison between the experimental data and the results assessed with the modified JC model, the proposed model could assess the stress-strain values more accurately, especially in the beginning of plastic deformation. This indicates that the composites exert the joint effects of strain rate hardening and temperature softening during high-speed impact deformation.

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