Study of theta ' precipitation behavior in Al-Cu-Cd alloys by phase-field modeling

Hu, Yisen1,2,3; Wang, Gang1,2,3; Ji, Yanzhou4; Wang, Liping1,2,3; Rong, Yiming1,2,5; Chen, Long-Qing4

2019-02-11

10.1016/j.msea.2019.01.012

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING   影响因子和分区

0921-5093

1873-4936

The theta'(Al2Cu) precipitation behavior of Al-Cu-Cd alloys was investigated by phase-field simulations. Due to the formation of Cu-Cd-vacancy clusters, the diffusion of Cu in the Al matrix is replaced by the movement of the clusters. Thus the diffusion model was modified and the diffusion coefficient of Cu-Cd-vacancy clusters was used in the new model. Moreover, the interfacial energy of theta' phase is reduced by the Cd atoms segregation at the alpha(AI)/theta' interface. Therefore, multiple combinations of coherent and semi-coherent interfacial energies were compared regarding the growth kinetics of theta' phase in the simulation. The results indicated that the variation of the diameter-to-thickness ratio of theta' phase primarily depended on the coherent interfacial energy. And the equilibrium diameter was a monotonically increasing function of the diameter-thickness ratio. Appropriate coherent and semi-coherent interfacial energies were obtained based on a comparison of the diameter-thickness ratio between the phase-field simulations and experimental data. The yield strength was calculated considering the morphology of the theta' phases and was validated by experimental results for different Al-Cu-Cd alloys.

Phase-field simulation Al-Cu-Cd alloy Precipitation Diffusion coefficient Interfacial energy

SCI ; EI

英语

其他

National Security Major Basic Research Program of China[61328302]

Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering

Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering

WOS:000458227900010

ELSEVIER SCIENCE SA

20190206364660

Aluminum alloys ; Cadmium alloys ; Diffusion ; Growth kinetics ; Interfacial energy ; Precipitation (chemical) ; Ternary alloys

Aluminum Alloys:541.2 ; Copper Alloys:544.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Chemical Operations:802.3

MATERIALS SCIENCE

Web of Science

1.Tsinghua Univ, State Key Lab Tribol, Lee Shau Kee S&T Bldg A924, Beijing 100084, Peoples R China
2.Tsinghua Univ, Dept Mech Engn, Inst Mfg Engn, Beijing 100084, Peoples R China
3.Tsinghua Univ, Beijing Key Lab Precis Ultra Precis Mfg Equipment, Beijing 100084, Peoples R China
4.Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
5.Southern Univ Sci & Technol, Mech & Energy Engn Dept, Shenzhen 518055, Peoples R China

Hu, Yisen,Wang, Gang,Ji, Yanzhou,et al. Study of theta ' precipitation behavior in Al-Cu-Cd alloys by phase-field modeling[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2019,746:105-114.

Hu, Yisen,Wang, Gang,Ji, Yanzhou,Wang, Liping,Rong, Yiming,&Chen, Long-Qing.(2019).Study of theta ' precipitation behavior in Al-Cu-Cd alloys by phase-field modeling.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,746,105-114.

Hu, Yisen,et al."Study of theta ' precipitation behavior in Al-Cu-Cd alloys by phase-field modeling".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 746(2019):105-114.