Influence of Cu precipitation on tensile properties of Fe–Cu–Ni ternary alloy at different temperatures by molecular dynamics simulation
| Autor: | Li-Juan You, Li-Juan Hu, Yao-Ping Xie, Shi-Jin Zhao |
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| Rok vydání: | 2016 |
| Předmět: |
010302 applied physics
Materials science General Computer Science Metallurgy General Physics and Astronomy Thermodynamics 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences Strength of materials Ternary alloy Computational Mathematics Molecular dynamics Brittleness Mechanics of Materials Lattice (order) 0103 physical sciences Ultimate tensile strength General Materials Science Structural transition 0210 nano-technology |
| Zdroj: | Computational Materials Science. 118:236-244 |
| ISSN: | 0927-0256 |
| DOI: | 10.1016/j.commatsci.2016.03.018 |
| Popis: | The influence of Cu precipitation on the tensile properties of Fe–1.1% Cu–0.9% Ni ternary alloy at different temperatures are analyzed using molecular dynamics (MD) method. The local lattice structural transition around Cu-rich clusters is generated by Cu-rich clusters forming during continuous cooling process. The formation of Cu-rich clusters and matrix of local lattice structural transition result in the decrease of tensile yield strength of the matrix material at room temperature. Therefore, the matrix becomes brittle and tends to fracture in the local structural transition area. It has been found that the formation of Cu-rich clusters reduces the yield strength of the matrix more greatly at aging temperature than room temperature. Furthermore, the higher the temperature is, the greater the degree is. Cu-rich clusters play a significant role in strengthening material at early stage, while the material strength decreases with time increase. |
| Databáze: | OpenAIRE |
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