Experimental Research on Tensile Behavior of Advanced High-Strength Steel DP600 at High Strain Rate
| Autor: | Cao Dong, Guangyao Li, Xu Zhang, Junjia Cui, Junrui Xu |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Strain (chemistry) Dual-phase steel Mechanical Engineering Constitutive equation 02 engineering and technology Strain rate 021001 nanoscience & nanotechnology 01 natural sciences Grain size Mechanics of Materials 0103 physical sciences Ultimate tensile strength General Materials Science Composite material Deformation (engineering) 0210 nano-technology Ductility |
| Zdroj: | Journal of Materials Engineering and Performance. 28:2411-2420 |
| ISSN: | 1544-1024 1059-9495 |
| Popis: | We conducted a series of experimental investigations on the mechanical properties of DP600 dual-phase steel under strain rates from 0.001 to 3000 s−1 at room temperature. A split Hopkinson tensile bar was used to capture a high strain rate response. A comparison of the quasi-static and dynamic experiment results showed that the yield strength and ultimate tensile strength increased significantly under dynamic conditions. Fractographs were analyzed by scanning electron microscopy, which indicated a better ductility at a high strain rate. Based on the experimental results, the Johnson–Cook constitutive model was applied to describe the tensile deformation behavior under various strain rates. A reasonable agreement was observed between the experimental data and the Johnson–Cook model. A metallographic analysis of tensile specimens showed that the average ferritic grain size of the fractured specimens at a high strain rate was smaller than that of the fractured specimens under quasi-static conditions. Ferritic grain refinement proved that high-speed forming could enhance the forming ability of the DP600 steel. |
| Databáze: | OpenAIRE |
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