A precipitation hardening model for Al-Cu-Cd alloys

Hu, Yisen1,2,3; Wang, Gang1,2,3; Ye, Mao4; Wang, Shuqing4; Wang, Liping1,2,3; Rong, Yiming1,2,5

2018-08-05

10.1016/j.matdes.2018.04.057

MATERIALS AND DESIGN   影响因子和分区

0264-1275

1873-4197

The addition of Cd in Al-Cu alloys can trap vacancies and extend their effect on the diffusion of Cu in the Al matrix. Moreover, Cd tends to segregate at the interfaces between theta ' (Al2Cu) and a (Al) phases, as well as reduce the interfacial energy and promote the nucleation of the theta ' phase. In the present study, a precipitation hardening model for Al-Cu-Cd alloys was proposed, which considers the effect of Cd on the precipitation process. The model describes precipitation as involving five stages: incubation, nucleation, growth, release of Cd, and coarsening. The effect of vacancies on the diffusion of Cu and on the nature of the dislocation-precipitate interaction was examined. The model incorporating the effect of Cd showed a great difference compared with that not including Cd effects; the predictions of the models were confirmed by experimental results. The influence of the Cu-Cd composition was also analyzed. The results indicate that a decrease in the Cu and Cd content leads to a lower yield strength and a longer duration of the artificial aging stages. (C) 2018 Elsevier Ltd. All rights reserved.

Precipitation hardening Al-Cu-Cd alloy Diffusion coefficient Vacancy

SCI ; EI

英语

其他

National Natural Science Foundation of China[U1537202] ; National Natural Science Foundation of China[51535011]

Materials Science

Materials Science, Multidisciplinary

WOS:000432566000014

ELSEVIER SCI LTD

20181805125339

Age hardening ; Aluminum alloys ; Binary alloys ; Cadmium alloys ; Diffusion ; Hardening ; Hardness ; Nucleation ; Precipitation (chemical) ; Ternary alloys ; Vacancies

Heat Treatment Processes:537.1 ; Aluminum Alloys:541.2 ; Copper Alloys:544.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Chemical Operations:802.3 ; Crystalline Solids:933.1 ; Crystal Growth:933.1.2 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Tsinghua Univ, Dept Mech Engn, State Key Lab Tribol, Beijing 100084, Peoples R China
2.Tsinghua Univ, Inst Mfg Engn, Beijing 100084, Peoples R China
3.Tsinghua Univ, Beijing Key Lab Precis Ultraprecis Mfg Equipments, Beijing 100084, Peoples R China
4.Capital Aerosp Machinery Co, Beijing 100076, Peoples R China
5.Southern Univ Sci & Technol, Mech & Energy Engn Dept, Shenzhen 518055, Peoples R China

Hu, Yisen,Wang, Gang,Ye, Mao,et al. A precipitation hardening model for Al-Cu-Cd alloys[J]. MATERIALS AND DESIGN,2018,151:123-132.

Hu, Yisen,Wang, Gang,Ye, Mao,Wang, Shuqing,Wang, Liping,&Rong, Yiming.(2018).A precipitation hardening model for Al-Cu-Cd alloys.MATERIALS AND DESIGN,151,123-132.

Hu, Yisen,et al."A precipitation hardening model for Al-Cu-Cd alloys".MATERIALS AND DESIGN 151(2018):123-132.