@inproceedings{2903ff817bcc4ebb816194598342a29a,
title = "Effect of friction stir welding speed and post weld heat treatment on the microstructure and hardness of AA7020",
abstract = "Aluminum alloy AA7020-T6 of 10mm thickness is friction stir welded using 800rpm tool rotation rate and different tool traverse speed of 40, 80 and 120mm/min using a tapered tool of 9.8mm probe length. The effect of post weld heat treatment on the microstructure stability inside the nugget zone as well as the hardness is also examined. Both the welded and post weld heat treated materials are investigated using optical microscopy, hardness measurement and tensile testing. A significant grain refining is obtained inside the nugget after friction stir welding (FSW) that was stable after post weld heat treatment. Hardness is increased with increasing the transverse speed after FSW while it is decreased after post weld heat treatment in all cases. Tensile testing results showed an increase with increasing the welding speed with a weld efficiency about 80\% is obtained. More investigation is needed to find out the causes behind the anomalous behavior of the alloy after PWHT in terms of hardness and tensile results.",
keywords = "AA7020, Friction stir welding, Post weld heat treatment",
author = "Ahmed, \{M. M.Z.\} and Essam Ahmed and Mahdy, \{Abdalla M.A.\}",
year = "2014",
doi = "10.1002/9781118888056.ch30",
language = "English",
isbn = "9781118887868",
series = "TMS Annual Meeting",
publisher = "Minerals, Metals and Materials Society",
pages = "253--264",
booktitle = "Characterization of Minerals, Metals, and Materials 2014 - Held During TMS 2014 143rd Annual Meeting and Exhibition",
address = "United States",
note = "Characterization of Minerals, Metals, and Materials 2014 - TMS 2014 143rd Annual Meeting and Exhibition ; Conference date: 16-02-2014 Through 20-02-2014",
}