本文選題：AZB　切入點：雙道次熱壓縮　出處：《航空材料學報》2017年03期

【摘要】：建立了一類鎂合金雙道次熱變形過程的二維元胞自動機模型�？紤]到鎂合金具有六重對稱的密排六方晶體結構,模型采用了六邊形元胞網格。另外,通過計算位錯密度演變和設定晶粒形核長大規(guī)則,模型將熱變形過程中動態(tài)再結晶、靜態(tài)回復、靜態(tài)再結晶、亞動態(tài)再結晶和晶粒長大等單個物理過程耦合到一起。為了驗證模型,將其應用到AZ31B鎂合金單道次和雙道次熱壓縮過程。探討了不同變形溫度、應變速率、道次間隔和預應變對應力-應變曲線的影響。將計算結果和實驗結果進行了對比,吻合較好。
[Abstract]:A two-dimensional cellular automaton model for two-pass secondary thermal deformation of magnesium alloys is established. Considering the hexagonal hexagonal crystal structure of magnesium alloys with hexagonal symmetry, the model adopts hexagonal cellular meshes. The dynamic recrystallization, static recovery and static recrystallization in the process of thermal deformation are obtained by calculating the evolution of dislocation density and setting the rules of nucleation and growth of grain. The single physical processes such as sub-dynamic recrystallization and grain growth are coupled together. In order to verify the model, the model is applied to the single-pass and double-pass thermal compression processes of AZ31B magnesium alloys. Different deformation temperatures and strain rates are discussed. The effect of pass interval and prestrain on the stress-strain curve is compared with the experimental results, and the calculated results are in good agreement with the experimental results.
【作者單位】： 天津職業(yè)技術師范大學天津市高速切削與精密加工重點實驗室;天津職業(yè)技術師范大學天津市模具數字化制造技術工程中心;遼寧科技大學材料科學與工程學院;日本W窆ひ蕩笱榷絲蒲а芯克，

本文編號：1698964