Artificial Aging Time Effect on Fatigue stress for Friction Stir Welded AA6061T6

Authors

  • Ahmad Jasim Mohammad Technical Learning Authority ,Technical Institute, Al swarah ,Iraq

DOI:

https://doi.org/10.31663/utjes.v6i3.589

Keywords:

Friction stir welding, 6061 Al-alloys, fatigue strength , solution heat treatment

Abstract

This work involves studying the effect of heat treatment on the fatigue stress of friction stir welded joint of 6061T6 aluminum alloy. The microstructure,micro hardness , tensile and fatigue test of the welds and base alloy were examined before and after heat treatment which includes solution heat treatment at 500ºC and artificial aging at 190ºC for 2, 4, and 8 hrs.The friction stir welding was carried out by using CNC milling machine at constant tool rotational speed of (1000 rpm) and welding speed of (20mm/min),the fatigue test is investigated for all specimens to obtain the S-N curve. The results show that the heat treatment decreased fatigue strength for all elements comparing with base metal, while ageing at 2 hrs gives the best fatigue strength due to participated phases.

Downloads

Published

2015-12-01

Issue

Vol. 6 No. 3 (2015)

Section

Articles

License

Copyright (c) 2015 The Author(s), under exclusive license to the University of Thi-Qar

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Artificial Aging Time Effect on Fatigue stress for Friction Stir Welded AA6061T6. (2015). University of Thi-Qar Journal for Engineering Sciences, 6(3), 31-42. https://doi.org/10.31663/utjes.v6i3.589