Influences of tool pin profile on microstructure , mechanical and defects of Friction stir welded 7075 aluminum alloy
Publish place: 4th Iran Aluminum International Conference IIAC2016
Publish Year: 1395
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
IIAC04_093
تاریخ نمایه سازی: 22 دی 1396
Abstract:
In this study, effect of geometry of the pin profile on microstructure, mechanical and defects of FSWed 7075 alloy was investigated. Three pins with cylindrical, square and triangle geometry were used for welding. Microstructure of the welding zone showed that the tunnel hole produced by triangle pin has smaller dimensions compared to cylindrical pin. On the other hand, results of optical microscope indicated that the size of grains resulted from square pin is smaller than the other kinds of tools. Also, the results showed that when the pin is cylindrical, tunnel, kissing bond, and zigzag line defects are formed. On the other hand, when the pin is triangle, original joint line with severe plastic deformation and crack defects are created. After welding with the square pin, tensile strength and the hardness were acquired 490 MPa and 160 HV respectively that were the maximum values compared to other pins
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Authors
Seyed Mahmoud Bayazid
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, P.O. Box: ۱۱۱۵۵-۴۵۶۳, Iran
Hassan Farhangi
School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran, Tehran, P.O. Box: ۱۱۱۵۵-۴۵۶۳, Iran