| 振动搅拌摩擦焊镁合金动态再结晶过程的模拟与实验研究 |
| |
| 摘 要： | 采用二维元胞自动机(CA)模型分析机械振动对AZ91合金在搅拌摩擦焊(FSW)过程中组织演变的影响.将模拟结果,即晶粒拓扑结构、粒度分布、平均晶粒度以及动态再结晶(DRX)分数与实测数据进行比较.结果显示,有限元分析结果与实验数据具有充分的相似性,CA方法可用于搅拌摩擦焊AZ91合金组织演变的分析.与FSW相比,振动搅...
|
| 关 键 词： | 搅拌摩擦焊 振动 模拟 晶粒度 动态再结晶 元胞自动机模型 |
| 收稿时间： | 2020-07-24 |
Simulation and experimental study of dynamic recrystallization process during friction stir vibration welding of magnesium alloys |
| |
| Mahmoud ABBASI,Behrouz BAGHERI,Farzaneh SHARIFI. Simulation and experimental study of dynamic recrystallization process during friction stir vibration welding of magnesium alloys[J]. Transactions of Nonferrous Metals Society of China, 2021, 31(9): 2626-2650. DOI: 10.1016/S1003-6326(21)65681-9 |
| |
| Authors: | Mahmoud ABBASI Behrouz BAGHERI Farzaneh SHARIFI |
| |
| Affiliation: | 1. Faculty of Engineering, University of Kashan, Kashan, Iran;2. Department of Mining and Metallurgy, Amirkabir University of Technology, Tehran, Iran;3. School of Mechanical and Materials Engineering, Washington State University, Pullman, USA |
| |
| Abstract: | A two-dimensional cellular automaton (CA) model was utilized to analyze the effect of mechanical vibration on microstructure evolution of AZ91 alloy during friction stir welding (FSW). The simulated results, namely grain topology, grain size distribution, average grain size, and also the dynamic recrystallization (DRX) fraction were compared with measured data. The adequate comparability between FEM and experimental data shows that the CA method can be applied to the analysis of the microstructure progression during the friction stir welding of AZ91 alloy. It is concluded that the dislocation density during the friction stir vibration welding (FSVW) is higher than that in the FSW process and the process of nucleation and grain growth is faster for samples during FSVW compared to FSW. The grain size modification and DRX phenomenon with various vibration frequencies were also simulated in detail during FSVW. It is found that vibration makes nucleation start earlier and decreases the proportion of the incubation period and the percentage of recrystallization as vibration frequency improves. |
| |
| Keywords: | friction stir welding vibration simulation grain size dynamic recrystallization cellular automaton model |
| 本文献已被 ScienceDirect 等数据库收录！ |
