基于CA方法的U-Nb合金铸件凝固过程的微观组织模拟
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- 英文论文题名：Microstructure simulation of U-Nb alloy casting based on CA method
- 论文作者：苏斌 ; 王震宏 ; 邬军 ; 罗超 ; 陆喜 ; 王晶
- 英文论文作者：SU Bin ; WANG Zhen-hong ; WU Jun ; LUO Chao ; LU Xi ; WANG Jing ; China Academy of Engineering Physics
- 年：2015
- 作者机构：中国工程物理研究院;
- 论文关键词：U-Nb合金 ; 凝固过程 ; 微观组织 ; Cellular Automaton ; 数值模拟
- 英文论文关键词：U-Nb alloy ; solidfication process ; microstructure ; cellular automaton ; numerical simulation
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第5册（核材料分卷、辐射防护分卷）
- 语种：中文
- 分类号：TG298
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：5
- 文件大小：324k
- 原文格式：O
- 会议级别：全国
摘要
目前,数值模拟技术已经成为预测铸件凝固行为以及微观组织形成演化过程的重要工具。本文建立U-Nb合金凝固过程微观组织演变的元胞自动机模型,模型考虑了固/液界面的溶质再分配、微观固相分数、曲率以及各向异性等因素。在宏观温度场模拟的基础上,通过建立的模型,可以模拟U-Nb合金铸件不同位置凝固过程微观组织演变,包括晶粒的形核、长大过程以及微观偏析的形成和演变规律,可以预测铸件的晶粒组织和成分分布,研究结果对U-Nb合金铸件质量的提高有着重要的意义。
In recent years,numerical simulation has become a powerful tool for simulating the microstructure evolution.In this paper,the microstructure evolution of U-Nb alloy during solidification process was simulated by using cellular automaton method.The preferential growth orientation,solute redistribution in both liquid and solid,solid/liquid interface solute conservation,interface curvature and the growth anisotropy were all considered in the model.By using the model,the microstructure evolution at different locations in U-Nb alloy casting can be simulated,and the grain size and solute distribution can be predicted.It is of great significance to improve the performance and quality of U-Nb alloy casting.
In recent years,numerical simulation has become a powerful tool for simulating the microstructure evolution.In this paper,the microstructure evolution of U-Nb alloy during solidification process was simulated by using cellular automaton method.The preferential growth orientation,solute redistribution in both liquid and solid,solid/liquid interface solute conservation,interface curvature and the growth anisotropy were all considered in the model.By using the model,the microstructure evolution at different locations in U-Nb alloy casting can be simulated,and the grain size and solute distribution can be predicted.It is of great significance to improve the performance and quality of U-Nb alloy casting.
引文
[1]石玉峰.铝合金砂型铸件微观组织及力学性能的数值模拟[D].北京:清华大学,2013.
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[4]陈利民.U-5Nb合金的制备、凝固过程和力学性能[D].成都:四川大学,2006.
[5]Rappaz M,et al.Probabilistic modeling of microstructure formation in solidification processes[J].Acta Metallurgica et Materialia,1993,41(2):345-360.
[6]李斌,等.低压铸造ZL114A铝合金微观组织模拟[J].金属学报,2008,44(2):243-248.
[7]李强,等.U-6%Nb二元合金凝固过程中显微组织与显微偏析的模拟[J].金属学报,2007,43(2):217-224.
[2]张新建,等.冷旋U-6.5Nb合金再结晶晶粒长大的实验研究[J].稀有金属材料与工程,2010,39(10):1815-1819.
[3]帅茂兵.铀合金的氢化特性和氢化处理研究[D].绵阳:中国工程物理研究院,2001.
[4]陈利民.U-5Nb合金的制备、凝固过程和力学性能[D].成都:四川大学,2006.
[5]Rappaz M,et al.Probabilistic modeling of microstructure formation in solidification processes[J].Acta Metallurgica et Materialia,1993,41(2):345-360.
[6]李斌,等.低压铸造ZL114A铝合金微观组织模拟[J].金属学报,2008,44(2):243-248.
[7]李强,等.U-6%Nb二元合金凝固过程中显微组织与显微偏析的模拟[J].金属学报,2007,43(2):217-224.