Precipitation strengthening behavior of Al-Cu-Mn alloys with the effect of casting segregation

Hu, Yisen1; Wang, Gang1; Jiang, Qing2; Xiao, Wenfeng2; Rong, Yiming3

10.7449/2017/MST_2017_193_200

2017

Materials Science and Technology Conference and Exhibition 2017, MS and T 2017

1

193-200

Pittsburgh, PA, United states

Association for Iron and Steel Technology, AISTECH

Al-Cu-Mn is one of typical heat-Treatable cast alloys with high strength which has been widely used in aerospace and automobile industries. The complete manufacturing process for Al- Cu-Mn components includes low pressure die casting, T6 heat treatment and machining. It has been found that the property in former process has been transferred to the sequent step with considerable effect. In this paper, a detailed study has been conducted on precipitation strengthening behavior of Al-Cu-Mn alloy under effects of casting macro-segregation. A plate of 60 mm thickness was prepared by using low pressure die casting and the chemical compositions were measured at different positions. The remarkable segregation was observed in the position close to the sprue. The yield strength and elongation in different aging time were compared. The results showed that the composition of Cu decreased from 5.1 % to 3.8 % through the thickness, which led to a decrease of the yield strength and an increasing time for aging, while the elongation appeared as a parabolic.
Copyright © (2017) by Materials Science & Technology (MS&T).

其他

EI

20180504695859

Aluminum alloys ; Automotive industry ; Binary alloys ; Copper alloys ; Die casting ; Heat treatment ; High strength alloys ; Manufacture ; Mechanical properties ; Precipitation (chemical) ; Segregation (metallography) ; Ternary alloys ; Yield stress

Metallurgy:531.1 ; Metallography:531.2 ; Foundry Practice:534.2 ; Heat Treatment Processes:537.1 ; Aluminum Alloys:541.2 ; Manganese and Alloys:543.2 ; Copper Alloys:544.2 ; Chemical Operations:802.3 ; Materials Science:951

EV Compendex

1.Department of Mechanical Engineering, Tsinghua University, Beijing; 100084, China
2.Capital Aerospace Machinery Company, Beijing; 100076, China
3.Mechanical and Energy Engineering Department, South University of Science and Technology of China, Shenzhen; 518055, China

Hu, Yisen,Wang, Gang,Jiang, Qing,et al. Precipitation strengthening behavior of Al-Cu-Mn alloys with the effect of casting segregation[C]:Association for Iron and Steel Technology, AISTECH,2017:193-200.