Title :
Free Energy Calculation of Al-Li-Mg Alloy from Electron Level
Author :
Jian-jun, Zhang ; Zheng, Chen ; Yong-xin, Wang
Author_Institution :
Sch. of Energy & Power Eng., North China Electr. Power Univ. Beijing, Beijing, China
Abstract :
Based on Thomas-Fermi model, the calculation method of free energy for atom cluster with electric field had been found. The change trend of free energy of Al-Li-Mg alloy under the effect of electric field had been calculated systemically and quantitatively. And following results had been given: mostly the free energy of Al3Li and Mg5Al8 at aging temperature is lower than that of free energy at solid solution temperature, but once the negative electric field increased to certain degree there will be opposite result. At aging temperature, the free energy of Al3Li and Mg5Al8 are lower than that of Al-2.14wt.%Li and Al-2.6wt.%Mg. And comparing with 1420 alloy, the electric field promotes the precipitation of Al3Li and restrains the precipitation of Mg5Al8.
Keywords :
Thomas-Fermi model; ageing; aluminium alloys; electric field effects; free energy; lithium alloys; magnesium alloys; solid solutions; 1420 alloy; Al-Li-Mg; Al-Li-Mg alloy; Thomas-Fermi model; aging temperature; atom cluster; electron level; free energy calculation; negative electric field; precipitation; solid solution temperature; Computers; Decision support systems; Distributed control; Monitoring; Al-Li-Mg alloy; Thomas-Fermi model; electric field; free energy;
Conference_Titel :
Computer Distributed Control and Intelligent Environmental Monitoring (CDCIEM), 2011 International Conference on
Conference_Location :
Changsha
Print_ISBN :
978-1-61284-278-3
Electronic_ISBN :
978-0-7695-4350-5
DOI :
10.1109/CDCIEM.2011.44
