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Creep constitutive model of 7050-T7451 aluminum alloy based on damage mechanics
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Jie LI, Peng ZHAO, Jianrui ZHANG, Yue HU, Fuzhen XUAN
Journal of Mechanical Strength | 2025, 47(5) : 152 - 158
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Journal of Mechanical Strength | 2025, 47(5): 152-158
• Experimental Research·Testing Technology •
Creep constitutive model of 7050-T7451 aluminum alloy based on damage mechanics
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Jie LI, Peng ZHAO, Jianrui ZHANG, Yue HU, Fuzhen XUAN
Affiliations
  • School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
Published: 2025-05-15 doi: 10.16579/j.issn.1001.9669.2025.05.017
Outline
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The creep behavior of 7050-T7451 aluminum alloy under different temperatures and stresses was studied by the uniaxial tensile creep test. Based on continuum damage mechanics, a constitutive model describing the creep behavior of aluminum alloy at high temperature was established. The model took into account the precipitation coarsening, dislocation multiplication/annihilation and microvoid formation during the creep process, and introduced the corresponding damage factor evolution formula to reflect these three damage processes. In addition, the model took into account the additional damage caused by stress increase to reveal the effect of stress on the creep damage. Based on the comparative analysis of the test results and the predicted results, it was verified that the established physical constitutive model can accurately describe the creep behavior of 7050 aluminum alloy under different temperatures and stresses.

Metal creep  /  Continuum damage model  /  Precipitation coarsening  /  Microvoid damage  /  Dislocation evolution
Jie LI, Peng ZHAO, Jianrui ZHANG, Yue HU, Fuzhen XUAN. Creep constitutive model of 7050-T7451 aluminum alloy based on damage mechanics[J]. Journal of Mechanical Strength, 2025 , 47 (5) : 152 -158 . DOI: 10.16579/j.issn.1001.9669.2025.05.017
Funding
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  • National Key Research and Development Program of China(2021YFB3702200)
  • Natural Science Foundation of Shanghai(21ZR1418200)
Appendix
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Year 2025 volume 47 Issue 5
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87
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Article Info
doi: 10.16579/j.issn.1001.9669.2025.05.017
  • Receive Date：2023-08-20
  • Online Date：2026-03-19
  • Published：2025-05-15
Article Data
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History
  • Received：2023-08-20
  • Revised：2023-12-05
Funding
National Key Research and Development Program of China(2021YFB3702200)
Natural Science Foundation of Shanghai(21ZR1418200)
Affiliations
    School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

Corresponding:

ZHAO Peng, E-mail：
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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