中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
PHASE-FIELD SIMULATION OF SOLUTE PRECIPITATIONS AROUND THE gamma PHASE IN Al-Ag ALLOY

文献类型:期刊论文

作者Gao Yingjun1,2,3; Luo Zhirong1,2; Zhang Shaoyi1; Huang Chuanggao1
刊名ACTA METALLURGICA SINICA
出版日期2010-12-11
卷号46期号:12页码:1473-1480
关键词Al-Ag alloy spinodal decomposition phase-field simulation precipitation
ISSN号0412-1961
DOI10.3724/SP.J.1037.2010.00216
通讯作者Gao Yingjun(gaoyj@gxu.edu.cn)
英文摘要Interactions between different precipitation products during phase decomposition for different alloys have been observed. Spinodal decomposition and intragranular precipitation are the two well-know mechanisms for explaining phase decomposition, both of which interaction mechanisms have been investigated experimentally in recently. A local free energy density function depending on aging temperature and composition has been proposed to describe the interaction between the Ag solute field and gamma precipitates in phase-field simulation of spinodal decomposition in Al-Ag alloy. The evolution of spinodal decomposition in Al-Ag alloy with 4.2%Ag and 22%Ag has been simulated by the phase-field method using this function to represent numerically the precipitated Guinier-Preston zones (GPZ) around a gamma phase. The simulated results show that PFZ around a precipitated phase is an elliptical and its width is about two times the width of gamma phase. In the region far from PFZ, a pattern of Ag solute field appears due to spinodal decomposition. When Ag-depleted zones are relatively far apart with each other, spinodal decomposition is strongly affected by them. The formation of PFZ resulting from spinodal decomposition has been initiated in the central region of the supersaturated a matrix before the modulation effect of Ag solute field at edge reachs here. It is found that two or three Ag-rich bands appear around the PFZ. During aging, Ag diffuses from not only the alpha matrix but also the edge of Ag-depleted zones, where an accumulation of Ag occurs. After long time aging, many droplet-like Ag solute bands are formed near PFZ around gamma phase. These simulated results are in better agreement with the experimental results.
资助项目National Natural Science Foundation of China[50661001] ; National Natural Science Foundation of China[50061001]
WOS研究方向Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000286034800001
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China
源URL[http://ir.imr.ac.cn/handle/321006/102264]  
专题金属研究所_中国科学院金属研究所
通讯作者Gao Yingjun
作者单位1.Guangxi Univ, Coll Phys Sci & Engn, Nanning 530004, Peoples R China
2.Guangxi Univ, Key Lab Disaster Prevent & Struct Safety, Nanning 530004, Peoples R China
3.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China
推荐引用方式
GB/T 7714
Gao Yingjun,Luo Zhirong,Zhang Shaoyi,et al. PHASE-FIELD SIMULATION OF SOLUTE PRECIPITATIONS AROUND THE gamma PHASE IN Al-Ag ALLOY[J]. ACTA METALLURGICA SINICA,2010,46(12):1473-1480.
APA Gao Yingjun,Luo Zhirong,Zhang Shaoyi,&Huang Chuanggao.(2010).PHASE-FIELD SIMULATION OF SOLUTE PRECIPITATIONS AROUND THE gamma PHASE IN Al-Ag ALLOY.ACTA METALLURGICA SINICA,46(12),1473-1480.
MLA Gao Yingjun,et al."PHASE-FIELD SIMULATION OF SOLUTE PRECIPITATIONS AROUND THE gamma PHASE IN Al-Ag ALLOY".ACTA METALLURGICA SINICA 46.12(2010):1473-1480.

入库方式: OAI收割

来源:金属研究所

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