Prediction of hot tearing susceptibility of direct chill casting of AA6111 alloys via finite element simulations |
| |
| Affiliation: | 1. School of Materials, Beijing Institute of Technology, Beijing 100081, China;2. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;3. Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China;1. Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education, Yanshan University, Qinhuangdao 066004, China;2. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;1. College of Energy Engineering, Yulin University, Yulin 719000, China;2. Yulin Key Laboratory of Metal Matrix Composites and Remanufacturing Technology, Yulin University, Yulin 719000, China;1. Programa de Pós-graduação em Ciência e Engenharia de Materiais (PPG-CEM), Universidade Federal de São Carlos (UFSCar), Rod. Washington Luiz, Km 235, 13565-905 São Carlos - SP, Brazil;2. Divisão de Materiais, Instituto de Aeronáutica e Espaço, CTA, Praça Marechal Eduardo Gomes, 50, 12228-904 São José dos Campos - SP, Brazil;3. Departamento de Engenharia de Materiais (DEMa), Universidade Federal de São Carlos (USFCar), Rod. Washington Luiz, Km 235, 13565-905 São Carlos - SP, Brazil;1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, PR China;2. Key Laboratory of Magnesium Alloys and the Processing Technology of Liaoning Province, PR China;1. Advanced Research Institute of Multidisciplinary Science (ARIM), Beijing Institute of Technology (BIT), Beijing, 100081, China;2. School of Materials Science and Engineering, University of Science & Technology Beijing (USTB), Beijing, 100083, China |
| |
| Abstract: | To predict hot tearing susceptibility (HTS) during solidification and improve the quality of Al alloy castings, constitutive equations for AA6111 alloys were developed using a direct finite element (FE) method. A hot tearing model was established for direct chill (DC) casting of industrial AA6111 alloys via coupling FE model and hot tearing criterion. By applying this model to real manufacture processes, the effects of casting speed, bottom cooling, secondary cooling, and geometric variations on the HTS were revealed. The results show that the HTS of the billet increases as the speed and billet radius increase, while it reduces as the interfacial heat transfer coefficient at the bottom or secondary water-cooling rate increases. This model shows the capabilities of incorporating maximum pore fraction in simulating hot tearing initiation, which will have a significant impact on optimizing casting conditions and chemistry for minimizing HTS and thus controlling the casting quality. |
| |
| Keywords: | vehicle light-weighting AA6111 alloy direct chill casting hot tearing criterion pore fraction finite element simulation |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
