Experimental and numerical studies of re-stirring and re-heating effects on mechanical properties in friction stir additive manufacturing
| Autor: | Zhao Zhang, Zhi-Jun Tan, Weiwei Liu, Jianjun Sha, Yufei Zu, Li Jianyu |
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| Rok vydání: | 2019 |
| Předmět: |
Imagination
0209 industrial biotechnology Chemical substance Materials science Mechanical Engineering media_common.quotation_subject Monte Carlo method 02 engineering and technology Industrial and Manufacturing Engineering Finite element method Computer Science Applications law.invention 020901 industrial engineering & automation Magazine Control and Systems Engineering law Friction stir welding Composite material Science technology and society Layer (electronics) Software media_common |
| Zdroj: | The International Journal of Advanced Manufacturing Technology. 104:767-784 |
| ISSN: | 1433-3015 0268-3768 |
| Popis: | Friction stir additive manufacturing is studied experimentally and numerically. Different to conventional friction stir welding, re-stirring and re-heating can be found for friction stir additive manufacturing. The new generated phenomena are investigated by new integrated model, which is established based on Monte Carlo method and precipitate evolution model with combination of finite element model. Corresponding experiments are performed. Results indicate that different grain morphology and size, different hardness, and different yield strength can be found in different layers. The re-stirring and re-heating to the formed layers can lead to enhancement of mechanical properties with smaller grains and with higher hardness and yield strength. In comparison with first layer, the hardness and yield strength on second layer are increased due to the decrease of the peak temperature. After 2–3 layers, the mechanical properties of formed layers are not further affected by the new added layers. |
| Databáze: | OpenAIRE |
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