Simulation of temperature and stress distributions in functionally graded materials synthesized by a spark plasma sintering process
| Autor: | Ming-Yan Sun, Sai Wei, Xiang-Bo Shen, Rui Yang, Fuchi Wang, Zhao-Hui Zhang, Shu-Kui Lee |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
business.product_category General Computer Science General Physics and Astronomy Spark plasma sintering Sintering General Chemistry Functionally graded material Finite element method Stress (mechanics) Computational Mathematics Temperature gradient Mechanics of Materials Scientific method Die (manufacturing) General Materials Science Composite material business |
| Zdroj: | Computational Materials Science. 60:168-175 |
| ISSN: | 0927-0256 |
| DOI: | 10.1016/j.commatsci.2012.03.024 |
| Popis: | A coupled electrical–thermal–mechanical finite element model is established to systematically investigate the temperature and stress distributions in a functionally graded material (FGM) based on Ti and TiB during a spark plasma sintering (SPS) process. The simulation results indicate that a stable axial temperature gradient in the specimen can be achieved using a die with an area-changing cross-section in the SPS process, thereby providing a beneficial condition for FGM sintering. The stress and the stress gradient are high at the bottom of the specimen, possibly leading to microstructural heterogeneity and cracks among adjacent layers. The simulation results also suggest that the temperature and stress gradient increase as the heating rate increases. The corresponding SPS experiments verified the simulation results and proved the superiority of the specially designed die. |
| Databáze: | OpenAIRE |
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