胡治流,李平珍,陆泽鹏,马本莉,丁俊,赵艳君,唐鹏,黄前斌.Al-Mg5.0-Mn0.5铝合金均匀化退火过程中Mg、Mn元素显微偏析的DICTRA 模拟[J].稀有金属材料与工程,2021,50(1):23~28.[Zhiliu Hu,Pingzhen Li,Zepeng Lu,Benli Ma,Jun Ding,Yanjun Zhao,Peng Tang,Qianbin Huang.DICTRA? simulation of Mg and Mn Micro Segregations in a Al-Mg5.0-Mn0.5 Aluminum Alloy During Homogenized Annealing[J].Rare Metal Materials and Engineering,2021,50(1):23~28.]
Al-Mg5.0-Mn0.5铝合金均匀化退火过程中Mg、Mn元素显微偏析的DICTRA 模拟
投稿时间:2020-05-23  修订日期:2020-07-31
中文关键词:  Al-5.0Mg-0.5Mn合金  DICTRA  分离因子  均质退火
基金项目:National Natural Science Foundation of China (No. 51661004), Innovation Drive Development Foundation of Guangxi (GK AA17202011), Guangxi Natural Science Foundation (2018GXNSFAA050048, 2017GXNSFAA198271) and Guangxi Key Laboratory Project for Processing Non-ferrous Metals and Characteristic Materials (GXYSSF1809).
中文摘要:
      基于DICTRA动力学软件的MOB2和Al基数据库对 Al-Mg5.0-Mn0.5铝合金在470℃不同时间均匀化退火过程中Mg和Mn元素的显微偏析情况进行了模拟计算。采用了模拟结果与显微组织观察相结合的方法,并使用偏析因子来评价470℃不同时间均匀化退火过程中Mg和Mn元素的偏析程度。在470℃不同退火时间Mg和Mn元素的偏析因子有如下变化:退火8.3小时后,Mg的偏析因子约为0.94,接近1.0,而Mn的偏析因子在0.78~1.3之间;在退火11.1小时后,Mg的偏析因子约为1.0,表示Mg的浓度基本扩散均匀,而Mn的偏析因子依然在0.78~1.3之间;退火27.8小时以后,Mn的偏析因子为0.8~1.3,与11.1小时相比只有微小的变化。根据计算结果,Mg引起的微观偏析可通过均匀化退火消除,470oC下最少退火时间为11.1小时;而Mn引起的微观偏析即使是470oC下退火保温时间为27.8 ~30小时依然不能消除。这为Al-Mg5.0-Mn0.5铝合金退火工艺的选择提供了参考。
DICTRA? simulation of Mg and Mn Micro Segregations in a Al-Mg5.0-Mn0.5 Aluminum Alloy During Homogenized Annealing
英文关键词:Al-5.0Mg-0.5Mn alloy  DICTRA  Segregation factor  Homogenized Annealing
英文摘要:
      Micro segregation of Mg and Mn in a Al-Mg5.0-Mn0.5 aluminum alloy homogenized annealing at 470°C was evaluated by computational simulation in DICTRA? software, using MOB2 diffusion database and Al-based database. The segregation factor was used to predict the distribution of Mg and Mn at 470°C annealing temperature for different annealing time. Simulation results were compared with microstructure observations. After homogenizing at 470 oC for 8.3h, the segregation factor of Mg was about 0.94, close to 1.0; while, the segregation factor of Mn varied from 0.78 to 1.3. After homogenization annealing at 470 oC for 11.1h, the segregation factor of Mg was close to 1.0, and concentration of Mg was basically uniform, the range of segregation factor of Mn was almost unchanged. However, almost the same segregation factor of 0.8~1.3 was observed for Mn at the annealing temperature of 470 °C and annealing time of 27.8h. According to the DICTRA calculation results, after homogenizing at 470oC/11.1h, the micro-segregation of Mg was nearly eliminated. While the micro-segregation of Mn could not be eliminated, even if the annealing holding time extended to 27.8 h and 30h. This provides a reference for the selection of annealing process of Al-Mg5.0-Mn0.5 aluminum alloy.
作者单位E-mail
胡治流 广西大学资源环境与材料学院广西有色金属及特色材料加工重点实验室 huzhiliu2682@163.com 
李平珍 广西大学资源环境与材料学院 18703732800@163.com 
陆泽鹏 广西大学资源环境与材料学院  
马本莉   
丁俊   
赵艳君 广西大学资源环境与材料学院广西有色金属及特色材料加工重点实验室 zhaoyanjun71@163.com 
唐鹏 广西大学资源环境与材料学院广西有色金属及特色材料加工重点实验室  
黄前斌 广西柳州银海铝业有限公司  
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