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Fatigue Behaviour of Ultrafine Grained AA 6063 Alloy at 25 °C and 180 °C

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Abstract

The high-temperature fatigue behaviour of ultra-fine grained AA 6063 alloy produced under optimized processing conditions in Repetitive Corrugation and Straightening (RCS) by 12 passes is examined. The Electron Back Scatter Diffraction analysis revealed that the average grain size was ~ 0.89 microns after 12 passes. Fatigue tests were conducted at 25 °C and 180 °C with R = − 1 and frequency = 10 Hz. At 25 °C and a low-stress level of 80 MPa, the RCS processed specimen displayed a fatigue life of 106 cycles. At a high stress level of 120 MPa at 25 °C the fatigue life decreased to 1.1 × 104 cycles. In contrast, at a stress level of 120 MPa and 180 °C, the fatigue life of the alloy was better (2 × 105 cycles).

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Acknowledgements

The authors thank Prof. Indradev Samajdar, Department of Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, India for allowing the use of the EBSD facility.

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The manuscript in part or in full has not been submitted or published anywhere. The manuscript will not be submitted elsewhere until the editorial process is completed. All the authors mentioned in the manuscript have agreed for authorship, read and approved the manuscript, and given consent for submission and subsequent publication of the manuscript.

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Correspondence to Balasivanandha Prabu Shanmugavel.

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Kathiresan, M., Ramdoss, S.R., Murugan, M. et al. Fatigue Behaviour of Ultrafine Grained AA 6063 Alloy at 25 °C and 180 °C. Trans Indian Natl. Acad. Eng. 7, 1327–1338 (2022). https://doi.org/10.1007/s41403-022-00367-7

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  • DOI: https://doi.org/10.1007/s41403-022-00367-7

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