CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Thermomechanical response of aluminum alloys under the combined action of tensile loading and laser irradiations |
Mohsan Jelani1, Zewen Li(李泽文)2, Zhonghua Shen(沈中华)1,2, Maryam Sardar1 |
1 School of Science, Nanjing University of Science and Technology, Nanjing 210094, China; 2 Advanced Launching Co-Innovation Centre, Nanjing University of Science and Technology, Nanjing 210094, China |
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Abstract This study reports the investigation of the thermomechanical behavior of aluminum alloys (Al-1060, Al-6061, and Al-7075) under the combined action of tensile loading and laser irradiations. The continuous wave ytterbium fiber laser (wavelength 1080 nm) was employed as the irradiation source, while tensile loading was provided by the tensile testing machine. The effects of various pre-loading and laser power densities on the failure time, temperature distribution, and the deformation behavior of aluminum alloys are analyzed. The experimental results represent the significant reduction in failure time for higher laser power densities and for high preloading values, which implies that preloading may contribute a significant role in the failure of the material at elevated temperature. Fracture on a microscopic scale was predominantly ductile comprising micro-void nucleation, growth, and coalescence. The Al-1060 specimens behaved plastically to some extent, while Al-6061 and Al-7075 specimens experienced catastrophic failure. The reason and characterization of material failure by tensile and laser loading are explored in detail. A comparative behavior of under-tested materials is also investigated. This work suggests that studies considering only combined loading are not enough to fully understand the mechanical behavior of under-tested materials. For complete characterization, one should consider the effect of heating as well as loading rate and the corresponding involved processes with the help of thermomechanical coupling and the thermal elastic-plastic theory.
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Received: 07 September 2017
Revised: 15 December 2017
Accepted manuscript online:
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PACS:
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79.20.Ds
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(Laser-beam impact phenomena)
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81.40.Wx
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(Radiation treatment)
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81.70.Bt
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(Mechanical testing, impact tests, static and dynamic loads)
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62.20.M-
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(Structural failure of materials)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61605079) and the Fundamental Research Funds for the Central Universities, China (Grant No. 30916014112-020). |
Corresponding Authors:
Zewen Li
E-mail: lizewen@njust.edu.cn
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Cite this article:
Mohsan Jelani, Zewen Li(李泽文), Zhonghua Shen(沈中华), Maryam Sardar Thermomechanical response of aluminum alloys under the combined action of tensile loading and laser irradiations 2018 Chin. Phys. B 27 037901
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