Dissimilar Friction Stir Welds in Al5186-Al2024: The Effect of Process Parameters on Microstructures and Mechanical Properties

Journal Article · Mon Jan 17 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3552570· OSTI ID:21510201

ShamAbadi, S H ^[1]

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1. School of Metallurgy and Materials Engineering, University College of Engineering, University of Tehran, Tehran (Iran, Islamic Republic of)

The effect of tool traverse and rotation speeds on the microstructures and mechanical properties are quantified for welds between non-age-hardening Al5083 and age hardening Al2024 and compared to single alloy joints made from each of the two constituents. In this paper, we report the results of microstructural, mechanical property investigations of Al5186-Al2024 friction stir welds produced using various rotations and traveling speeds of the tool to investigate the effects of the welding parameters on the joint strength. Metallographic studies by optical microscopy, electron probe microscopy, and the utilization of the X-ray diffraction technique have been conducted. It was found that the weld properties were dominated by the thermal input rather than the mechanical deformation by the tool. In particular the larger stresses under the weld tool on the AA5186 side compared to the AA2024 side are related to a transient reduction in yield stress due to dissolution of the hardening precipitates during welding prior to natural aging after welding.

• OSTI ID: 21510201
• Journal Information: AIP Conference Proceedings, Vol. 1315, Issue 1; Conference: AMPT2010: International conference on advances in materials and processing technologies, Paris (France), 24-27 Oct 2010; Other Information: DOI: 10.1063/1.3552570; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AGE HARDENING
AGING
ALLOYS
ALUMINIUM ALLOYS
DEFORMATION
DISSOLUTION
ELECTRON PROBES
INTERNAL FRICTION
MECHANICAL PROPERTIES
METALLOGRAPHY
MICROSTRUCTURE
OPTICAL MICROSCOPY
PRECIPITATION
ROTATION
STRESSES
TRANSIENTS
VELOCITY
WELDED JOINTS
WELDING
X-RAY DIFFRACTION
COHERENT SCATTERING
DIFFRACTION
FABRICATION
FRICTION
HARDENING
JOINING
JOINTS
MICROSCOPY
MOTION
PROBES
SCATTERING
SEPARATION PROCESSES