Evaluation of creep-fatigue life and strength for AA7001-T6 under constant amplitude loading

Authors

DOI:

https://doi.org/10.15587/1729-4061.2022.263344

Keywords:

AA7001-T6, AA7001-T6 mechanical properties, сreep-fatigue Interaction, various temperature, fatigue life, S-N curve, strength for AA7001-T6

Abstract

Aluminum alloys were widely used in the construction, automotive, marine, and aviation industries due to their low specific strength, ease of manufacture, and low weight. The fatigue behavior of aluminum alloys at different temperatures is investigated. Thanks to the rapid development of armament in recent years, 7XXX ultra-high strength aluminum alloys are now used more frequently because of their non-corrosive qualities and low weight. Aluminum alloy 7001-T6 behavior is examined at the Company State for Engineering, Rehabilitation, and Inspection (SIER) in Iraq, where chemical analysis of the AA7001 is supported. Most engineering components that operate at high temperatures will eventually fail from fatigue strain, creep damage is a time-dependent process that is primarily influenced by the history of stress and temperature applied to the component. When the two damaging factors combine their effects, This study used AA7001-T6 to conduct experiments on mechanical characteristics (UTS, YS, E, and ductility) and the interaction between creep and fatigue at four distinct temperatures: room temperature (25, 150, 280, and 330) °C, the UTS, YS, and E were lowered by 37.2, 37.2, and 24) %, respectively, as compared to the result at room temperature, but the ductility increased by 28.27 %. It has been noted that rising temperatures cause mechanical and fatigue characteristics to decline. Experimental S-N fatigue test findings showed a significant loss of fatigue strength, After 107cycles, the endurance fatigue limit was reduced from 208 MPa at (RT) to 184 MPa at 330 °C, an 11.5 % reduction. Overall, it can be said that AA7001-T6 demonstrates a significant drop in mechanical and fatigue properties at high temperatures

Supporting Agency

  • The authors would like to acknowledge the support of the University of Technology (Iraq) of (Electromechanical Engineering Department) for providing the experimental support with the equipment and The Company State for Engineering, Rehabilitation and Inspection (SIER) in Iraq.

Author Biographies

Huda Salih Mahdi, University of Diyala

Master's Student in Mechanical Engineering

Department of Mechanical Engineering

Hussain J. Alalkawi, Bilad Alrafidain University College

Doctor of Mechanical Engineering, Professor

Department of Engineering Aeronautical Techniques

Muzher T. Mohamed, University of Diyala

Doctor of College Material Engineering, Professor

Department of Material Engineering

Saad T. Faris, University of Diyala

Doctor of College Mechanical Engineering, Professor

Department of Mechanical Engineering

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Published

2022-08-27

How to Cite

Mahdi, H. S., Alalkawi, H. J., Mohamed, M. T., & Faris, S. T. (2022). Evaluation of creep-fatigue life and strength for AA7001-T6 under constant amplitude loading . Eastern-European Journal of Enterprise Technologies, 4(12 (118), 22–28. https://doi.org/10.15587/1729-4061.2022.263344

Issue

Vol. 4 No. 12 (118) (2022): Materials Science

Section

Materials Science

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Copyright (c) 2022 Huda Salih Mahdi, Hussain J. Alalkawi, Muzher T. Mohamed, Saad T. Faris

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