| Title | Hot Deformation Behavior and Microstructure Mechanisms of As-Cast 2219 Al Alloy |
| Authors | Zhang, Yun Jiang, Ripeng Yang, Yilong Li, Ruiqing Chen, Pinghu Li, Xiaoqian Zhang, Lihua |
| Affiliation | Cent South Univ, Light Alloy Res Inst, Changsha 410012, Peoples R China Cent South Univ, Natl Key Lab High Performance Complex Mfg, Changsha 410083, Peoples R China Peking Univ, Sch Adv Mat, Shenzhen Grad Sch, Shenzhen 518055, Peoples R China Cent South Univ, Sch Mech & Elect Engn, Changsha 410083, Peoples R China |
| Keywords | CONTINUOUS DYNAMIC RECRYSTALLIZATION ALUMINUM-ALLOY CONSTITUTIVE MODEL PROCESSING MAP METADYNAMIC RECRYSTALLIZATION STATIC RECRYSTALLIZATION HIGH NB EVOLUTION COMPRESSION RECOVERY |
| Issue Date | Apr-2020 |
| Publisher | JOM |
| Abstract | The hot deformation behavior of ultralarge 2219 Al alloy has been investigated by isothermal deformation tests. The microstructure was characterized by transmission electron microscopy, scanning electron microscopy, and electron backscattered diffraction analysis. The results indicated that the true stress increased rapidly during the initial stage of deformation, then remained stable after reaching the peak stress. The peak stress increased with decreasing temperature and increasing strain rate. It was found that the main restoration mechanisms were dynamic recovery and partial continuous dynamic recrystallization (CDRX). The submicron theta or theta ' particles had a pinning effect on the dislocation motion and grain boundary sliding, and suppressed the CDRX process. In addition, the irregular millimeter- or micron-sized theta particles were broken up during deformation, effectively relaxing the stress concentration and inducing the DRX process. |
| URI | http://hdl.handle.net/20.500.11897/586466 |
| ISSN | 1047-4838 |
| DOI | 10.1007/s11837-020-04042-6 |
| Indexed | SCI(E) Scopus EI |
| Appears in Collections: | 新材料学院 |
