本文選題：AZB　切入點(diǎn)：雙道次熱壓縮　出處：《航空材料學(xué)報(bào)》2017年03期

【摘要】：建立了一類鎂合金雙道次熱變形過(guò)程的二維元胞自動(dòng)機(jī)模型�？紤]到鎂合金具有六重對(duì)稱的密排六方晶體結(jié)構(gòu),模型采用了六邊形元胞網(wǎng)格。另外,通過(guò)計(jì)算位錯(cuò)密度演變和設(shè)定晶粒形核長(zhǎng)大規(guī)則,模型將熱變形過(guò)程中動(dòng)態(tài)再結(jié)晶、靜態(tài)回復(fù)、靜態(tài)再結(jié)晶、亞動(dòng)態(tài)再結(jié)晶和晶粒長(zhǎng)大等單個(gè)物理過(guò)程耦合到一起。為了驗(yàn)證模型,將其應(yīng)用到AZ31B鎂合金單道次和雙道次熱壓縮過(guò)程。探討了不同變形溫度、應(yīng)變速率、道次間隔和預(yù)應(yīng)變對(duì)應(yīng)力-應(yīng)變曲線的影響。將計(jì)算結(jié)果和實(shí)驗(yàn)結(jié)果進(jìn)行了對(duì)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(shù)師范大學(xué)天津市高速切削與精密加工重點(diǎn)實(shí)驗(yàn)室;天津職業(yè)技術(shù)師范大學(xué)天津市模具數(shù)字化制造技術(shù)工程中心;遼寧科技大學(xué)材料科學(xué)與工程學(xué)院;日本W(wǎng)窆ひ蕩笱榷絲蒲а芯克，

本文編號(hào)：1698964