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Study on the Microdamage Evolution of Two Aluminum Alloys Under Different Stress States Based on Acoustic Emission

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Data-Enabled Discovery and Applications

Abstract

It is challenging to determine the damage type or mechanism under different stress states because of the high degree of disorder of the microdamage inside the metal material. The application of many nondestructive testing methods makes the realization of this subject possible. In this work, acoustic emission (AE) was implemented to test the microdamage evolution process of two aluminum alloy materials (1060 and 6063). Two types of notched specimens (shear and tensile) had been used. AE signatures acquired during testing were used to construct the multicomponent variate DA damage matrix. The multicomponent variate DA matrix and probabilistic entropy were applied to analyze the diversity of the microdamage evolution of different materials under different stress states. And the fracture surfaces were observed by a scanning electron microscope (SEM) to verify the correctness of the analysis results. Consequently, the probabilistic entropy results show that AE data characterization can effectively distinguish the significant difference of microdamage evolution of the aluminum alloys under two kinds of stress state. It is also shown that the microdamage evolution mechanism represented by the probabilistic entropy of aluminum alloys under the same stress state is consistent.

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Acknowledgments

We thank Dr. Wayne in University of Memphis for his gracious help with this work.

Funding

The project described was supported by Number 11272234 and Number 11772228 from the National Natural Science Fund of China.

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Authors and Affiliations

  1. Tianjin Key Laboratory of Integrated Design and Online Monitoring for Light Industry and Food Machinery and Equipment, Tianjin University of Science and Technology, Hexi District, Tianjin, 300222, China

    Jianyu Li, Zhonghui Jia & Gang Qi

  2. Engineering Sciences Building, Mechanical Engineering Department, University of Memphis, Memphis, TN, 38152, USA

    Gang Qi

Authors
  1. Jianyu Li
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  2. Zhonghui Jia
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  3. Gang Qi
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Correspondence to Jianyu Li.

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Li, J., Jia, Z. & Qi, G. Study on the Microdamage Evolution of Two Aluminum Alloys Under Different Stress States Based on Acoustic Emission. Data-Enabled Discov. Appl. 3, 6 (2019). https://doi.org/10.1007/s41688-018-0028-z

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  • DOI: https://doi.org/10.1007/s41688-018-0028-z

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