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Effect of Temperature on Grain Size in AA6063 Aluminum Alloy Subjected to Repetitive Corrugation and Straightening

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

The influence of processing temperature on grain size reduction in AA 6063 aluminum alloy subjected to repetitive corrugation and straightening (RCS) is investigated in this work. The aluminum alloy was processed by RCS at different temperatures (room temperature, 100 °C, 200 °C and 300 °C) till the maximum number of passes possible before failure and the mechanical properties such as tensile strength and hardness were measured. The grain size and their misorientation of grains of the processed samples were analyzed using the electron backscattered diffraction. The results indicated that the transformation of low-angle grain boundaries to high-angle grain boundaries and dislocation tangles were highly dependent on the strain imparted, which could be controlled by selecting the proper processing temperature. As a result, the mechanical properties are affected. In particular, the room temperature tensile strength and hardness values of the processed material decrease with increasing processing temperature.

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Acknowledgements

This work was supported financially by the Department of Science and Technology, Government of India (No. SB/FTP/ETA-104/2012). The authors gratefully acknowledge the help of Prof. V. Subramanya Sarma, IITM, Chennai, for the EBSD measurements.

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Authors and Affiliations

  1. Department of Mechanical Engineering, St. Joseph’s Institute of Technology, Chennai, 600 119, India

    N. Thangapandian

  2. Department of Mechanical Engineering, College of Engineering Guindy, Anna University, Chennai, 600 025, India

    S. Balasivanandha Prabu & K. A. Padmanabhan

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  1. N. Thangapandian
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  2. S. Balasivanandha Prabu
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  3. K. A. Padmanabhan
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Correspondence to N. Thangapandian.

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Thangapandian, N., Balasivanandha Prabu, S. & Padmanabhan, K.A. Effect of Temperature on Grain Size in AA6063 Aluminum Alloy Subjected to Repetitive Corrugation and Straightening. Acta Metall. Sin. (Engl. Lett.) 32, 835–844 (2019). https://doi.org/10.1007/s40195-018-0866-6

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  • DOI: https://doi.org/10.1007/s40195-018-0866-6

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