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Mechanical and microstructural variations in ECAP of Ti–6Al–4V alloy with equiaxed microstructure

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Abstract

The aim of this study is to investigate mechanical and microstructural variations of Ti–6Al–4V acquired through various equal channel angular pressing (ECAP) cycles. The ECAP of Ti–6Al–4V alloy with the first equiaxed microstructure was carried out by an isothermal warm and isothermal die method. ECA pressing carried out on cylindrical samples at 650 °C. Mechanical and microstructural investigations were performed concerning Ti–6Al–4V in the first state after 2, 4, and 8 passes. Optical microscopy (OM) investigation shows that alpha grain size increases and beta grain size decreases with the pass numbers increasing. Beta phase content initially decreases in the first two ECAP passes. The results show that more equiaxed alpha grains are achieved after four ECAP passes. Results of X-ray diffraction (XRD) analysis show that crystallite size decreases with the number of passes increasing. After two ECAP passes, a vivid increase in mechanical strength is observed; however, the increment dramatically slows down by the increasing number of passes.

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Acknowledgements

This study was financially supported by Amirkabir University of Technology (No. 40.509). The authors are grateful to R. Mortezaei for their help with experiments. The authors would also like to thank the precision forming group at the Malek Ashtar University of Technology for performing ECAP experiments.

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Authors and Affiliations

  1. Mining and Metallurgical Engineering Department, Amirkabir University of Technology, Tehran, 1591634311, Iran

    Hamid Arabi & Mostafa Ketabchi

  2. University Complex of Material and Manufacturing, Malek Ashtar University of Technology, Tehran, 1678815611, Iran

    S. H. N. Alhosseini

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  1. Hamid Arabi
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  2. Mostafa Ketabchi
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  3. S. H. N. Alhosseini
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Correspondence to Mostafa Ketabchi.

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Arabi, H., Ketabchi, M. & Alhosseini, S.H.N. Mechanical and microstructural variations in ECAP of Ti–6Al–4V alloy with equiaxed microstructure. Rare Met. 41, 2732–2738 (2022). https://doi.org/10.1007/s12598-018-1071-5

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  • DOI: https://doi.org/10.1007/s12598-018-1071-5

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