DU W,BAI Y C,CHEN W X,et al. Synergistic enhancement of strength and ductility of 7075 aluminum alloy via solution, pre-stretching, and aging processes[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 537-1 542.
DU W,BAI Y C,CHEN W X,et al. Synergistic enhancement of strength and ductility of 7075 aluminum alloy via solution, pre-stretching, and aging processes[J]. Special Casting & Nonferrous Alloys,2026,46(10):1 537-1 542.DOI: 10.15980/j.tzzz.T20250141.
Synergistic Enhancement of Strength and Ductility of 7075 Aluminum Alloy via Solution, Pre-stretching, and Aging Processes
A combined strategy of solution treatment, pre-stretching, and subsequent aging was employed to investigate the influence of varying pre-stretching deformations on microstructure evolution and mechanical properties of as-aged 7075 alloys. Characterizations were investigated by optical microscopy, scanning electron microscopy integrated with electron backscatter diffraction, and a universal mechanical testing machine. EDS results reveal the presence of coarse white AlCuFeZn intermetallic phases and relatively fine AlZnMgCu precipitates in specimens. Optimal strength-ductility combination is achieved in specimens subjected to 5% pre-stretching followed by aging at 120 ℃ for 12 h, where the yield strength, tensile strength and elongation reach 490 MPa, 558 MPa, and 15.1%, respectively. The superior mechanical performance can be attributed to the synergistic effects of dislocation strengthening and precipitation strengthening. Tensile fracture indicates that specimens are characterized by mixed ductile-brittle fracture, and pre-stretching magnitude has negligible effects on quantity, size, and distribution of dimples.
LI S S , YUE X , LI Q Y , et al . Development and applications of aluminum alloys for aerospace industry [J]. Journal of Materials Research and Technology , 2023 , 27 : 944 - 983 .
KHALID M Y , UMER R , KHAN K A . Review of recent trends and developments in aluminium 7075 alloy and its metal matrix composites (MMCs) for aircraft applications [J]. Results in Engineering , 2023 , 20 : 10 137 .
AN L H , CAI Y , LIU W , et al . Effect of pre-deformation on microstructure and mechanical properties of 2219 aluminum alloy sheet by thermomechanical treatment [J]. Transactions of Nonferrous Metals Society of China , 2012 , 22 : 370 - 375 .
LI G A , MA Z , JIANG J T , et al . Effect of pre-stretch on the precipitation behavior and the mechanical properties of 2219 Al alloy [J]. Materials , 2021 , 14 ( 9 ): 2 101 .
LONG M J , JIANG F , WU F F , et al . Synergistic improvement of strength and ductility of an ultra-high strength Al-Zn-Mg-Cu alloy through a new aging strategy [J]. Materials Today Communications , 2024 , 40 : 109 655 .
NIU F J , CHEN J H , DUAN S Y , et al . The effect of pre-deformation on the precipitation behavior of AlCuMg(Si) alloys with low Cu/Mg ratios [J]. Journal of Alloys and Compounds , 2020 , 823 ( 1 ): 1 - 9 .
ZHAO X Y , CHEN X , WANG X . Effect of aging processes on corrosion behavior and stress corrosion sensitivity of pre-stretched 7075 aluminum alloy [J]. Materials and Corrosion , 2018 , 69 ( 7 ): 850 - 857 .
PENG G S , CHEN K H , CHEN S Y , et al . Evolution of the second phase particles during the heating-up process of solution treatment of Al-Zn-Mg-Cu alloy [J]. Materials Science and Engineering , 2015 , A641 : 237 - 241 .
YANG W C , JI S X , ZHANG Q , et al . Investigation of mechanical and corrosion properties of an Al-Zn-Mg-Cu alloy under various ageing conditions and interface analysis of η ′ precipitate [J]. Materials & Design , 2015 , 85 : 752 - 761 .
WANG S S , JIANG J T , FAN G H , et al . Accelerated precipitation and growth of phases in an Al-Zn-Mg-Cu alloy processed by surface abrasion [J]. Acta Materialia , 2017 , 131 : 233 - 245 .
LEE S H , JUNG J G , BAIK S I , et al . Precipitation strengthening in naturally aged Al-Zn-Mg-Cu alloy [J]. Materials Science and Engineering , 2021 , A803 : 140 719 .
PENG W F , GAO Y H , LI H , et al . Effects of different initial states on dynamic tensile properties and microstructure of 7075 aluminum alloy [J]. Materials Science and Engineering , 2024 , A891 : 145 939 .
YANG H B , QIAN Z , ZHANG G J , et al . The grain refinement performance of B-doped TiC on Zr-containing Al alloys [J]. Journal of Alloys and Compounds , 2018 , 731 : 774 - 783 .
FANG H C , LUO F H , CHEN K H . Effect of intermetallic phases and recrystallization on the corrosion and fracture behavior of an Al-Zn-Mg-Cu-Zr-Yb-Cr alloy [J]. Materials Science and Engineering , 2017 , A684 : 480 - 490 .
MA E , WU X L . Tailoring heterogeneities in high-entropy alloys to promote strength-ductility synergy [J]. Nature Communications , 2019 , 10 ( 1 ): 5 623 .
OU L , LI L Y , FAN C H , et al . Enhancement of strength and ductility in 6061Al alloy processed by cross accumulative roll bonding [J]. Transactions of Nonferrous Metals Society of China , 2023 , 33 ( 7 ): 2 001 - 2 013 .
LIU T , JIANG H T , SUN H , et al . Effects of rolling deformation on precipitation behavior and mechanical properties of Al-Zn-Mg-Cu alloy [J]. Materials Science and Engineering , 2022 , A847 : 143 342 .
ZHANG Z , WU Y Q , HUANG F L . Extension of a shear-controlled ductile fracture criterion by considering the necking coalescence of voids [J]. International Journal of Solids and Structures , 2022 , 236 : 111 324 .
Preparation and Microstructure Behavior of Magnesium Rare-earth Alloy Materials by Selective Laser Melting
Effects of Aging Treatment on Microstructure and Properties of Al-Si-Zn-Cu-Mg Alloy
Process and Performance of 7075 Aluminum Alloy Friction Stir Welding
Effects of Multi-step Aging on Mechanical Properties and Microstructure of QBe2 Beryllium Bronze
Effects of Hot Extrusion on Microstructure and Properties of Mg-2Zn-3Sn-0.5Nd Alloy
Related Author
SONG Ziyang
CHEN Liwen
JING Jianhui
ZHAO Yuan
WANG Xianting
HOU Hua
ZHAO Yuhong
HE Jian′gang
Related Institution
School of Materials Science and Engineering, MOE Jointly Collaborative Innovation Center for High-performance Al/Mg Based Materials, Shanxi Key Laboratory of Intelligent Casting and Advanced Forming for New Materials, North University of China
Beijing Advanced Innovation Center for Materials Genome Engineering, University of Science and Technology Beijing
School of Materials Science and Engineering, Taiyuan University of Science and Technology
Institute of Materials Intelligent Technology, Liaoning Academy of Materials
College of Materials Science and Engineering, Hubei University of Automotive Technology