((山東大學(xué) 材料科學(xué)與工程學(xué)院，濟(jì)南 250061))
摘 要: 為建立一個(gè)具有更好物理基礎(chǔ)的晶粒長(zhǎng)大仿真模型，采用CA法，基于熱力學(xué)和能量機(jī)制，提出元胞取向狀態(tài)轉(zhuǎn)變的二次判斷方式，制定相應(yīng)的轉(zhuǎn)變規(guī)則，并對(duì)不同溫度和材料遷移激活能條件下晶粒長(zhǎng)大過程進(jìn)行模擬研究。模擬結(jié)果較準(zhǔn)確地反映正常晶粒長(zhǎng)大規(guī)律以及溫度和材料遷移激活能的影響規(guī)律，且得到實(shí)際觀察和相關(guān)理論的驗(yàn)證。
關(guān)鍵字: 元胞自動(dòng)機(jī)；計(jì)算機(jī)模擬；晶粒長(zhǎng)大；轉(zhuǎn)變規(guī)則
（(School of Materials Science and Engineering, Shandong University, Ji’nan 250061, China)）
Abstract:In order to set up a CA model that has a better physical significance, a new second criterion, considering the effects of the thermodynamic mechanism and the activation energy, was appended for the transition of cellular state. The grain growth processes were investigated for different temperatures and activation energies, respectively. The results are in accordance with the normal grain growth kinetics and reflect the both effects of temperature and the activation energy.
Key words: cellular automaton (CA); computer simulation; grain growth; transition rule
