Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 527, Issue 20, Pages 5130-5135Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.04.091
Keywords
Friction stir processing; Aluminum alloy; Flow visualization; Strain; Strain-rate
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A soft and ductile aluminum foil is embedded within a workpiece undergoing friction stir processing (FSP) to observe the deformation zone. A whirlpool of material is detected in the stir zone which consumes the foil over time. Among different approaches to estimate material strain, a logarithmic thickness strain is defined and experimentally measured by observing the gradual change in thickness of ductile aluminum foil. Additionally a strain-rate is numerically evaluated from the FSP process parameters and the deformed foil geometry using finite-element analysis. It is believed that this method provides reliable strain-rates in the friction stir process. (C) 2010 Elsevier B.V. All rights reserved.
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