【摘要】：為了研究7055鋁合金在熱壓縮過(guò)程中的組織演變規(guī)律,基于元胞自動(dòng)機(jī)法(CA)建立7055鋁合金動(dòng)態(tài)再結(jié)晶(DRX)模型。為了獲得模型的材料參數(shù),進(jìn)行單道次熱壓縮實(shí)驗(yàn),通過(guò)最小二乘法擬合獲得7055鋁合金的位錯(cuò)密度模型、形核率模型和再結(jié)晶晶粒長(zhǎng)大模型。研究應(yīng)變、應(yīng)變速率、變形溫度和初始晶粒尺寸對(duì)熱壓縮過(guò)程中顯微組織演變的影響。結(jié)果表明:在熱壓縮過(guò)程中,動(dòng)態(tài)再結(jié)晶使材料晶粒明顯細(xì)化。大應(yīng)變、高溫和低應(yīng)變速率有利于晶粒細(xì)化;動(dòng)態(tài)再結(jié)晶晶粒的穩(wěn)態(tài)晶粒尺寸與初始晶粒大小無(wú)關(guān),而取決于溫度和應(yīng)變速率的變化;分析熱壓縮過(guò)程動(dòng)態(tài)再結(jié)晶動(dòng)力學(xué)規(guī)律。由CA仿真流變應(yīng)力值和仿真組織圖與實(shí)驗(yàn)結(jié)果的對(duì)比可知,所建立的基于CA法的動(dòng)態(tài)再結(jié)晶模型能有效地預(yù)測(cè)7055鋁合金在熱變形過(guò)程中的動(dòng)態(tài)再結(jié)晶組織演變規(guī)律。
[Abstract]:In order to study the microstructure evolution of 7055 aluminum alloy during hot compression, the dynamic recrystallization (DRX) model of 7055 aluminum alloy was established based on (CA). The dislocation density model, nucleation rate model and recrystallization grain growth model of 7055 aluminum alloy were obtained by least square fitting in order to obtain the material parameters of the model. The effects of strain, strain rate, deformation temperature and initial grain size on microstructure evolution during hot compression were studied. The results show that dynamic recrystallization makes the grain finer obviously in the process of hot compression. Large strain, high temperature and low strain rate are beneficial to grain refinement, the steady grain size of dynamic recrystallization grain is independent of initial grain size, but depends on the change of temperature and strain rate, and the dynamic recrystallization kinetics law of hot compression process is analyzed. The dynamic recrystallization model based on CA method can effectively predict the dynamic recrystallization microstructure evolution of 7055 aluminum alloy during hot deformation according to the comparison of CA simulation flow stress and simulation microstructure diagram with the experimental results. The results show that the dynamic recrystallization model based on CA method can effectively predict the dynamic recrystallization microstructure evolution of 7055 aluminum alloy during hot deformation.
【作者單位】： 南京航空航天大學(xué)機(jī)電學(xué)院;中南大學(xué)機(jī)電工程學(xué)院;
【基金】：Projects(51175257,51405520) supported by the National Natural Science Foundation of China
【分類號(hào)】：TG146.21

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 劉筱;李落星;何鳳億;周佳;朱必武;張立強(qiáng);;采用元胞自動(dòng)機(jī)結(jié)合Laasraoui-Jonas位錯(cuò)密度模型模擬AZ31鎂合金的動(dòng)態(tài)再結(jié)晶行為(英文)[J];Transactions of Nonferrous Metals Society of China;2013年09期

2 劉筱;朱必武;李落星;;Laasraoui-Jonas位錯(cuò)密度模型結(jié)合元胞自動(dòng)機(jī)模擬AZ31鎂合金動(dòng)態(tài)再結(jié)晶[J];中國(guó)有色金屬學(xué)報(bào);2013年04期

3 石玉峰;許慶彥;柳百成;;三維枝晶生長(zhǎng)數(shù)值模擬及實(shí)驗(yàn)驗(yàn)證(英文)[J];Transactions of Nonferrous Metals Society of China;2012年11期

4 張繼祥;文輝;劉運(yùn)騰;;Monte Carlo Model in Metal Recrystallization Simulation[J];Journal of Shanghai Jiaotong University(Science);2011年03期

5 金朝陽(yáng);劉娟;崔振山;韋東來(lái);;Identification of nucleation parameter for cellular automaton model of dynamic recrystallization[J];Transactions of Nonferrous Metals Society of China;2010年03期

【共引文獻(xiàn)】

相關(guān)期刊論文 前9條

1 Mohamed Ibrahim Abd EL AAL;;純鋁等徑角擠壓及等徑角擠壓和直接擠壓結(jié)合的塑性變形3D有限元模擬和實(shí)驗(yàn)驗(yàn)證（英文）[J];Transactions of Nonferrous Metals Society of China;2017年06期

2 郭廷彪;李琦;張鋒;王晨;楊樂(lè)馨;賈智;;等通道轉(zhuǎn)角擠壓-扭轉(zhuǎn)的純銅變形行為模擬[J];蘭州理工大學(xué)學(xué)報(bào);2017年03期

3 唐超蘭;李豪;李賽毅;;等通道轉(zhuǎn)角擠壓加工路徑對(duì)純銅晶粒細(xì)化的影響（英文）[J];Transactions of Nonferrous Metals Society of China;2016年07期

4 高雷雷;張金中;沙磊;孫陽(yáng);;等通道轉(zhuǎn)角擠壓AZ31鎂合金的工藝參數(shù)影響[J];金屬世界;2016年01期

5 曹富榮;溫景林;丁樺;王昭東;于傳平;夏飛;;擴(kuò)展組合模連續(xù)鑄擠鋁管材的擠壓力分析(英文)[J];Transactions of Nonferrous Metals Society of China;2014年11期

6 段翠芳;常萬(wàn)軍;;ZK60鎂合金ACPP擠壓棒材組織演變及其時(shí)效析出強(qiáng)化[J];金屬熱處理;2014年08期

7 K.ZHANG;B.HOLMEDAL;S.DUMOULIN;O.S.HOPPERSTAD;;一種亞彈黏塑性晶體塑性模型的顯示積分算法(英文)[J];Transactions of Nonferrous Metals Society of China;2014年07期

8 趙天章;宋鴻武;張光亮;程明;張士宏;;拉拔過(guò)程中珠光體鋼絲心部的織構(gòu)演化規(guī)律及其對(duì)力學(xué)性能的影響[J];金屬學(xué)報(bào);2014年06期

9 姜巨福;王迎;杜之明;羅守靖;;新SIMA法制備AZ80合金半固態(tài)坯料的組織與性能(英文)[J];Transactions of Nonferrous Metals Society of China;2012年S2期

【二級(jí)參考文獻(xiàn)】

相關(guān)期刊論文 前2條

1 應(yīng)韜;鄭明毅;胡小石;吳昆;;Recycling of AZ91 Mg alloy through consolidation of machined chips by extrusion and ECAP[J];Transactions of Nonferrous Metals Society of China;2010年S2期

2 鄭明毅;范國(guó)棟;佟立波;胡小石;吳昆;;Damping behavior and mechanical properties of Mg-Cu-Mn alloy processed by equal channel angular pressing[J];Transactions of Nonferrous Metals Society of China;2008年S1期

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