Abstract
The influence of tool shoulder diameter and its rotational speed on the high temperature plastic deformation of the material during friction stir welding of AA 2014 aluminum alloy is investigated, using the principles of hot working. The soundness of weld and defect formation are analyzed using the Zener–Hollomon parameter ‘Z’ to describe the high temperature plastic deformation behaviour of material, under the simultaneous influence of temperature and strain-rate. The observed hot deformation behaviour is correlated with the deformation processing map for the first time. At a given rotational speed, the volume of shoulder driven flow reduces with increasing shoulder diameter.
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Acknowledgments
The authors would like to thank Dr. Amol A. Ghokale, Outstanding Scientist & Director, Defence Metallurgical Research laboratory (DMRL), Hyderabad for his constant encouragement and permission to publish this work. One of the authors (Mr. K. Ramanjaneyulu) expresses his gratitude to the management of MGIT, Hyderabad for their support in carrying out this work. Financial assistance from Defence Research and Development Organization (DRDO) is gratefully acknowledged.
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Ramanjaneyulu, K., Madhusudhan Reddy, G. & Venugopal Rao, A. Role of Tool Shoulder Diameter in Friction Stir Welding: An Analysis of the Temperature and Plastic Deformation of AA 2014 Aluminium Alloy. Trans Indian Inst Met 67, 769–780 (2014). https://doi.org/10.1007/s12666-014-0401-z
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DOI: https://doi.org/10.1007/s12666-014-0401-z