Abstract

Fine grained 5083 aluminum alloy is the most common Al-Mg alloy for superplastic forming (SPF) of lightweight sheet metal parts in the automotive and aerospace industries. the fine-grained sheet is industrially produced by massive cold rolling of conventionally rolled sheet stock at high cost. Friction stir processing (FSP) as a thermomechanical process is very effective in refining the microstructure of as-cast alloys such as that produced by continuous strip casting (CC). in this work, the effect of friction stirs processing on the superplastic properties of three CC 5083 aluminum alloys, with different Mn content, has been investigated. the three alloys were friction stir processed. Very fine microstructures with grain sizes less than 3μm were obtained. Tensile tests revealed elongations of over 600% at a high strain rate of 10-1s-1 in all 3 alloys. the maximum tensile elongation of 800% was achieved in the alloy with the lowest Mn content at 490°C and strain rate of 3x10-2s-1. the stability of the microstructure was an important concern above 500°C. © 2011 Elsevier B.V..

Department(s)

Materials Science and Engineering

Keywords and Phrases

Aluminum alloys; Friction stir processing; Grain refinement; Superplasticity

International Standard Serial Number (ISSN)

0921-5093

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 Elsevier, All rights reserved.

Publication Date

01 Feb 2012

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Metallurgy Commons

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