Mechanical behaviors and deformation control of As-quenched Al-Cu alloy for large aerospace structures

Yuan，Qingyao1; Wang，Gang1; Ren，Ke2; Wang，Wenguang1; Rong，Yiming2

10.7449/2018/MST_2018_924_931

2019

Materials Science and Technology 2018, MS and T 2018

924-931

Columbus, OH, United states

Association for Iron and Steel Technology, AISTECH

Excessive deformation in quenching is one of major problems in the integrated manufacturing process of large aerospace structures. In this paper, the mechanical properties during quenching were studied for the high-strength cast Al-Cu alloy, and the difference on flow stress was found between high-temperature and low-temperature cooling stages. The Arrhenius constitutive model was proposed to evaluate the effect of temperature. A thermo-mechanical simulation was conducted with the consideration of cooling sequence and clamping fixture. The reason on quenching deformation was concluded that the deformation energy was transformed into plastic strain in high-temperature stage under the constraint of the fixture, while it was converted into elastic energy with the increase of the material strength in low-temperature stage which was released as a springback. The new process design was proposed and the distortion was well controlled from 8mm to 2mm.

Al-Cu alloy Deformation Mechanical property Thermo-mechanical simulation

其他

英语

EI

National Natural Science Foundation of China[]

20190406409501

Binary alloys ; Copper alloys ; Deformation ; Fixtures (tooling) ; High strength alloys ; Mechanical properties ; Quenching ; Temperature ; Thermomechanical treatment

Metallurgy:531.1 ; Heat Treatment Processes:537.1 ; Aluminum Alloys:541.2 ; Copper Alloys:544.2 ; Machine Tool Accessories:603.2 ; Thermodynamics:641.1 ; Materials Science:951

2-s2.0-85060215287

Scopus

1.State Key Laboratory of TribologyTsinghua University,Beijing,100084,China
2.Mechanical and Energy Engineering DepartmentSouthern University of Science and Technology of China,Shenzhen,518055,China

Yuan，Qingyao,Wang，Gang,Ren，Ke,et al. Mechanical behaviors and deformation control of As-quenched Al-Cu alloy for large aerospace structures[C]:Association for Iron and Steel Technology, AISTECH,2019:924-931.