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Effect of electropulsing treatment on microstructure and tensile fracture behavior of aged Mg–9Al–1Zn alloy strip

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Abstract

The effect of electropulsing treatment (EPT) on the microstructure, mechanical properties, and tensile fracture behavior of aged Mg–9Al–1Zn alloy strip at room temperature was investigated. The results indicated that EPT accelerated the spheroidizing and dissolution of β phase tremendously in the aged Mg–9Al–1Zn alloy strip. The EPT-induced microstructural change resulted in remarkably increasing elongation to failure, remained tensile strength unchanged. A mechanism for rapid spheroidizing and dissolution process of β phase during EPT was proposed based on the reduction of nucleation thermodynamic barrier and enhancement of atomic diffusion. Fracture analysis showed that with increase in frequency of EPT transgranular dimple fracture becomes predominant instead of the quasicleavage fracture.

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Authors and Affiliations

  1. Advanced Materials Institute, Graduate School at Shenzhen, Tsinghua University, Shenzhen, 518055, People’s Republic of China

    Yanbin Jiang & Guoyi Tang

  2. Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon Tong, Hong Kong

    Yanbin Jiang & Chanhung Shek

  3. Department of Industrial and Systems Engineering, Hong Kong Polytechnic University, Kowloon, Hong Kong

    Yaohua Zhu

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  1. Yanbin Jiang
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  2. Guoyi Tang
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  3. Chanhung Shek
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Correspondence to Guoyi Tang.

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Jiang, Y., Tang, G., Shek, C. et al. Effect of electropulsing treatment on microstructure and tensile fracture behavior of aged Mg–9Al–1Zn alloy strip. Appl. Phys. A 97, 607–615 (2009). https://doi.org/10.1007/s00339-009-5260-9

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  • DOI: https://doi.org/10.1007/s00339-009-5260-9

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