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An FEM analysis with experimental validation to study the hardness of in-process cryogenically cooled drilled holes in Mg AZ31b

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dc.contributor.author Ammouri, A.H.
dc.contributor.author Kheireddine, A.H.
dc.contributor.author Lu, T.
dc.contributor.author Jawahir, I.S.
dc.contributor.author Hamade, R.F.
dc.date.accessioned 2018-02-26T13:12:46Z
dc.date.available 2018-02-26T13:12:46Z
dc.date.copyright 2013 en_US
dc.identifier.issn 2212-8271 en_US
dc.identifier.uri http://hdl.handle.net/10725/7148
dc.description.abstract The goal of a number of many recent studies is to assess the potential of cryogenic cooling in improving the sustainability of manufacturing processes. One prime interest is the enhancement of surface integrity properties of newly machined surfaces. In this paper, we study the effect of liquid nitrogen cryogenic cooling on the surface integrity of drilled holes in magnesium AZ31b using an indexable drill. Utilized are both experimental techniques and numerical (FEM) simulations. Specifically, liquid nitrogen at cryogenic temperatures was pumped through the drill's built-in through spindle coolant holes. HV micro-hardness measurements were performed on the newly machined holes surfaces. Furthermore, the process was modelled in FEM via an appropriate convective cooling approximation superimposed on the drilling process. Outputs of the numerical model such as strains, strain rates, and temperatures were used to predict the grain size at the surface of the holes and, consequently, hardness. Hardness values (determined from both experiments and FEM analyses) with different feed rates for dry drilled holes were compared against those from cryogenically cooled holes with the latter being found to have higher hardness values when compared to non-cooled ones. en_US
dc.language.iso en en_US
dc.title An FEM analysis with experimental validation to study the hardness of in-process cryogenically cooled drilled holes in Mg AZ31b en_US
dc.type Article en_US
dc.description.version Published 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.relation.journal Procedia CIRP en_US
dc.journal.volume 8 en_US
dc.article.pages 588-593 en_US
dc.keywords Cryogenic en_US
dc.keywords Drilling en_US
dc.keywords AZ31 en_US
dc.keywords FEM en_US
dc.keywords Vicker Hardness en_US
dc.identifier.doi https://doi.org/10.1016/j.procir.2013.06.156 en_US
dc.identifier.ctation Kheireddine, A. H., Ammouri, A. H., Lu, T., Jawahir, I. S., & Hamade, R. F. (2013). An FEM analysis with experimental validation to study the hardness of in-process cryogenically cooled drilled holes in Mg AZ31b. Procedia CIRP, 8, 588-593 en_US
dc.author.email ali.ammouri@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S2212827113004332 en_US
dc.author.affiliation Lebanese American University en_US


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