Pre-cooling Effects on the Resulting Grain Size in Friction Stir Processing of AZ31B

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dc.contributor.author Ammouri, Ali H.
dc.contributor.author Kridli, Ghassan T.
dc.contributor.author Ayoub, George Y.
dc.contributor.author Hamade, Ramsey H.
dc.date.accessioned 2018-02-27T10:20:19Z
dc.date.available 2018-02-27T10:20:19Z
dc.date.copyright 2015 en_US
dc.date.issued 2018-02-27
dc.identifier.uri http://hdl.handle.net/10725/7152
dc.description.abstract The effects of in-process cryogenic LN cooling on the resulting grain size of the friction stir processing (FSP) of twin roll cast (TRC) magnesium alloy AZ31B. Sheets (3 mm-thick) of TRC AZ31B were friction stir processed using a wide range of processing parameters (mostly tool feed and spindle speed). The tool rotational speed was varied between 600 RPM and 2,000 RPM while the tool feed rate varied between 75 mm/min and 900 mm/min. Thrust force and torque values were experimentally measured using a 4-component dynamometer. Temperature measurements were monitored during the different tests using Infrared sensors and thermocouples. The microstructure of processed samples was observed using optical microscopy. It was found that thrust force and torque values of the pre-cooled samples were 5% higher than those of the room temperature samples due to the material hardening induced by the cooling effect. Finer and more homogenous microstructure was observed for the pre-cooled samples when compared with samples processed at room temperature. The average grain size of pre-cooled samples was predicted using a relation -previously introduced by the authors- that relate grain size and the Zener-Hollomon parameter for TRC AZ31B. This equation was found to correctly predict grain diameter for in-line cooled FSP AZ31B samples at temperatures lower than room temperature. en_US
dc.language.iso en en_US
dc.publisher Springer en_US
dc.title Pre-cooling Effects on the Resulting Grain Size in Friction Stir Processing of AZ31B en_US
dc.type Conference Paper / Proceeding en_US
dc.author.school SOE en_US
dc.author.idnumber 201306469 en_US
dc.author.department Industrial And Mechanical Engineering en_US
dc.description.embargo N/A en_US
dc.keywords AZ31B en_US
dc.keywords Cryogenic cooling en_US
dc.keywords Friction stir processing en_US
dc.keywords Forces en_US
dc.keywords Microstructure en_US
dc.keywords Zener-Hollomon en_US
dc.identifier.ctation Ammouri, A. H., Kridli, G. T., Ayoub, G. Y., & Hamade, R. F. (2015). Pre-cooling Effects on the Resulting Grain Size in Friction Stir Processing of AZ31B. In Transactions on Engineering Technologies (pp. 355-365). Springer, Dordrecht. en_US
dc.author.email ali.ammouri@lau.edu.lb en_US
dc.conference.pages 355-365 en_US
dc.conference.title Transactions on Engineering Technologies en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url https://link.springer.com/chapter/10.1007/978-94-017-9804-4_24 en_US
dc.publication.date 2015 en_US
dc.author.affiliation Lebanese American University en_US

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