Preprint Article Version 1 This version is not peer-reviewed

Microstructure and Properties of 2219 Aluminum Alloy under Compound Technologies of Friction-Stir-Welding, Heat-Treatment and Electromagnetic Forming

Version 1 : Received: 25 March 2018 / Approved: 27 March 2018 / Online: 27 March 2018 (11:11:35 CEST)

A peer-reviewed article of this Preprint also exists.

Wang, Z.; Huang, L.; Li, J.; Li, X.; Zhu, H.; Ma, F.; Ma, H.; Cui, J. Microstructure and Properties of Friction Stir Welded 2219 Aluminum Alloy under Heat Treatment and Electromagnetic Forming Process. Metals 2018, 8, 305. Wang, Z.; Huang, L.; Li, J.; Li, X.; Zhu, H.; Ma, F.; Ma, H.; Cui, J. Microstructure and Properties of Friction Stir Welded 2219 Aluminum Alloy under Heat Treatment and Electromagnetic Forming Process. Metals 2018, 8, 305.

Journal reference: Metals 2018, 8, 305
DOI: 10.3390/met8050305

Abstract

Among all the processing technologies of heat-treatable aluminum alloys like 2219 aluminum alloy, using friction stir welding (FSW) as the joining technology and using electromagnetic forming (EMF) for plastic forming technology both have obvious advantages and successful applications. Therefore, there is a broad prospect for the compound technologies which can be used on the 2219 aluminum alloy to manufacture the large-scale thin-wall parts in the astronautic industry. The microstructure and mechanical properties of 2219 aluminum alloy under the process compounded of FSW, heat treatment, and EMF were investigated by means of tensile test, optical microscope (OM), and scanning electron microscope (SEM). The results show that the reduction of strength, which was caused during the FSW process, can be recovered effectively by the post-welding heat treatment composed of solid solution and aging, while the ductility was still reduced after heat treatment. Under the compound technology of FSW, heat treatment, and EMF, the forming limit of 2219 aluminum alloy decreased distinctly due to the poor ductility of the welding joint. A ribbon-pattern, which was formed due to the banded structure caused by FSW process, was found on the fracture surface of welded 2219 aluminum alloy after EMF treatment. During the EMF process, because of the effects of induced eddy current, a unique structure, which was manifested as a molted-surface appearance under the SEM observation, was formed as the material fractured.

Subject Areas

aluminum alloy; electromagnetic forming; friction stir welding; heat treatment; secondary phase

Readers' Comments and Ratings (0)

Leave a public comment
Send a private comment to the author(s)
Rate this article
Views 0
Downloads 0
Comments 0
Metrics 0
Leave a public comment

×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.