【作者】 杜勇； 徐洪辉； 黄伯云； 潘竹； 陈海林； 熊伟； 刘树红； 刘咏； 贺跃辉；

【Author】 Yong Du, Honghui Xu, Huang Baiyun, Pan Zhu, Chen Hailin, Xiong Wei, Liu Shuhong, Liu Yong, He Yuehui State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

【机构】 中南大学粉末冶金国家重点实验室；

【摘要】 对Al-Fe—Mg—Si和Al-Fe-Mn-Si两个四元系进行了热力学优化计算。采用光学显微镜、Scanning Electron Microscope和Electron Probe Microanalysis实验技术,系统研究了多组元Al基合金 Al356．1的定向凝固显微组织及显微偏析。计算模拟了三个多组元Al合金(Al356．1,Al356．2,Al518．2) 的平衡凝固和非平衡凝固的显微组织及显微偏析。模型计算结果与实测数据符合得很好,这证实了所建立的多组元体系热力学及动力学数据库的可靠性。更多还原

【Abstract】 The thermodynamic assessments of two quaternary systems Al-Fe-Mg-Si and Al-Fe-Mn-Si were performed. Systematic investigation on the microstructure and microsegregation of directionally solidified multicomponent alloy A1356.1 was conducted by using optical microscopy, Scanning Electron Microscope and Electron Probe Microanalysis techniques. The microstructure and microsegregation of three multicomponent alloys (A1356.1, A1356.2 and A1518.2) were simulated under the conditions of equilibrium solidification and non-equilibrium solidification. The good agreement between the model-predicted results and the experimental ones demonstrates the reliability of the established thermodynamic and kinetic databases.更多还原