A thermal mechanical coupling numerical model of 7050 aluminium alloy was established using the Hansel-Spittel constitutive model. The stress state of the samples during quenching and cold deformation was analyzed using the finite element simulation technology at first, which is in good accordance with the measured result by ultrasonic test. Then, residual stress evolution rule during heat treatment and cold deformation of an aluminium component with rib structure was studied and ultrasonic residual stress inspection and matching deformation verification were carried out on the structural component. The results show that residual stress after quenching is in the state of external compression and internal tension. The reduction degree of quenching induced residual stress by different cold deformation methods is obviously different. For cold compression, when deformation exceeds 2%, compression on the web obviously improves stress state of the whole web region while compression on the lib has relatively less improvement. For cold stretching, 3% deformation can effectively improve the stress uniformity for both web region and lib region. After cold stretching, the distortion during machining can be obviously improved.
YAN Y C , HUANG P , LI W , et al. Research progress of Al-Zn-Mg-Cu ultra-high strength aluminum alloy[J]. Materials Review, 2018, 32 (2): 358- 364.
2
ROBINSON J S , TANNER D A , PETEGEM S V , et al. Influence of quenching and aging on residual stress in Al-Zn-Mg-Cu alloy 7449[J]. Materials Science and Technology, 2012, 4 (28): 420- 430.
3
ROBINSON J S , TANNER D A , TRUMAN C E , et al. The Influence of quench sensitivity on residual stresses in the aluminiumalloys 7010 and 7075[J]. Materials Characterization, 2012, 65, 73- 85.
doi: 10.1016/j.matchar.2012.01.005
4
CASUSO M , POLVOROSA R , VEIGA F , et al. Residual stress and distortion modeling on aeronautical aluminum alloy parts for machining sequence optimization[J]. International Journal of Ad-vanced Manufacturing Technology, 2020, 110, 1219- 1232.
doi: 10.1007/s00170-020-05816-7
5
CHOBAUT N , CARRON D , ARSENE S , et al. Quench induced residual stress prediction in heat treatable 7×××aluminiumalloy thick plates using gleeble interrupted quench tests[J]. Journal of Materials Processing Technology, 2015, 222, 373- 380.
doi: 10.1016/j.jmatprotec.2015.03.029
6
XIAO B W , LI K Y , WANG Q G , et al. Numerical simulation and experimental validation of residual stresses in water quenched aluminum alloy castings[J]. Journal of Materials Engineering and Performance, 2011, 20 (9): 1648- 1657.
doi: 10.1007/s11665-011-9866-7
7
CARLONE P , PALAZZO G S , PASQUINO R . Finite element analysis of the steel quenching process: temperature field and solid-solid phase change[J]. Computers & Mathematics with Applications, 2010, 59 (1): 585- 594.
8
DOLAN G P , ROBINSON J S . Residual stress reduction in7175-T73, 6061-T6 and 2017A-T4 aluminum alloys using quenching factor analysis[J]. Journal of Materials Processing Technology, 2004, 153, 346- 351.
9
TANNER D A , ROBINSON J S . Modeling stress reduction techniques of cold compression and stretching in wrought aluminium alloy products[J]. Finite Elements in Analysis and Design, 2003, 39 (5/6): 369- 386.
10
ROBINSON J S , TANNER D A . Reducing residual stress in 7050 aluminum alloy die forgings by heat treatment[J]. Journal of Engineering Materials and Technology, 2008, 130, 1- 8.
YAO S J , XIA W J , YUAN W H , et al. Residual stress reduction of 7050 large-scale aluminum alloy forging based on segmented cold-pressing method[J]. Materials for Mechanical Engineering, 2018, 43 (1): 84- 88.
YUAN W H , ZHAO H Q , ZHANG H . Analysis of residual stress in quenched high-strength aluminum alloy ultra-thick plates and their reduction through cold compression[J]. Hot Working Technology, 2019, 48 (12): 165- 168.
13
MUAMMER K , JOHN C , TAYLAN A . Prediction of residual stresses in quenched aluminum blocks and their reduction through cold working processes[J]. Journal of Materials Processing Technology, 2006, 174, 342- 354.
doi: 10.1016/j.jmatprotec.2006.02.007
14
SELLARS C M . Computer modeling of hot-working processes[J]. Materials Science and Technology, 1985, 1 (4): 325- 332.
doi: 10.1179/mst.1985.1.4.325
WANG X , SHI Y W , LIANG J , et al. Stress in pre-stretched aluminum alloy plate by acoustic elasticity[J]. Journal of Mater-ials Engineering, 2015, 43 (12): 95- 100.