期刊
JOURNAL OF MANUFACTURING PROCESSES
卷 20, 期 -, 页码 234-244出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jmapro.2015.07.005
关键词
Friction-stir welding; Thermoplastics; Induction heating; Tool-pin temperature; Tensile strength; Hardness reduction ratio
资金
- Department of Science and Technology, Gov. of India [SR/FTP/ETA-34/2009]
This paper presents a hybrid friction-stir welding process, i-FSW, for the joining of thermoplastics. In this process, the friction-stir tool during welding is heated by induction and the temperature is precisely maintained though feedback control. The paper conveys new observations on friction-stir welding of thermoplastics through a case study on the welding of high-density polyethylene plates. The mechanical behavior and weld microstructure were studied over a wide range of tool rotational speeds and tool-pin temperatures. A narrow transition zone between the weld and base materials without any defect ensures joints with a similar strength to the base material, vis-a-vis better than previously reported results with the same material. A drop in hardness at the weld zone, for all the parameters, and a transition from brittle to ductile nature of the joints at higher tool-pin temperatures were observed. The material flow and weld formation mechanism in i-FSW is discussed. (C) 2015 The Society of Manufacturing Engineers. Published by Elsevier Ltd. All rights reserved.
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