.

An experimental and numerical study of the effect of cryogenic cooling on the surface integrity of drilled holes in AZ31B Mg alloy

LAUR Repository

Show simple item record

dc.contributor.author Ammouri, A. H.
dc.contributor.author Kheireddine, A. H.
dc.contributor.author Lu, T.
dc.contributor.author Dillon, O. W.
dc.contributor.author Hamade, R. F.
dc.contributor.author Jawahir, I. S.
dc.date.accessioned 2017-01-17T13:40:05Z
dc.date.available 2017-01-17T13:40:05Z
dc.date.copyright 2015 en_US
dc.identifier.issn 0268-3768 en_US
dc.identifier.uri http://hdl.handle.net/10725/5020
dc.description.abstract In-process cryogenic cooling has been credited with more precise products and enhanced integrity of machined surfaces. Enhanced surface integrity properties include smoother and more precise surfaces, grain refinement, and increase in surface hardness. This paper reports on the effect of liquid nitrogen (LN) cryogenic cooling and cutting parameters on surface hardness of drilled holes in magnesium alloy AZ31B. Drilling experiments of in-process cryogenic cooling were conducted while measuring thrust force and torque. Surface microhardness (HV) values and grain structure at drilled hole surfaces were measured. Finite element analysis (FEM) and model for simulating this cryogenically cooled drilling operation was developed. Numerical output of the state variables strain, strain rate, and temperature were used to predict Zener–Hollomon parameter (Z-parameter) values at the surfaces of the holes. Using an expression that relates Z-parameter to grain size, average values of the latter were estimated. Surface hardness values were also estimated from a Hall–Petch-like relation. Cryogenic cooling was found to have a pronounced effect in increasing surface hardness. Experimental measurements of grain size and hardness values compare favorably with the numerical results of the FEM model. In-process application of cryogenic cooling resulted in improved surface hardness of drilled holes as compared with those drilled while dry. en_US
dc.language.iso en en_US
dc.title An experimental and numerical study of the effect of cryogenic cooling on the surface integrity of drilled holes in AZ31B Mg alloy 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 The International Journal of Advanced Manufacturing Technology en_US
dc.journal.volume 78 en_US
dc.journal.issue 1 en_US
dc.article.pages 269-279 en_US
dc.keywords Cryogenic cooling en_US
dc.keywords Drilling en_US
dc.keywords AZ31B en_US
dc.keywords FEM en_US
dc.keywords Vickers hardness en_US
dc.keywords Grain size en_US
dc.identifier.doi http://dx.doi.org/10.1007/s00170-014-6650-5 en_US
dc.identifier.ctation Kheireddine, A. H., Ammouri, A. H., Lu, T., Dillon Jr, O. W., Hamade, R. F., & Jawahir, I. S. (2015). An experimental and numerical study of the effect of cryogenic cooling on the surface integrity of drilled holes in AZ31B Mg alloy. The International Journal of Advanced Manufacturing Technology, 78(1-4), 269-279. 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 http://link.springer.com/article/10.1007/s00170-014-6650-5 en_US
dc.author.affiliation Lebanese American University en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

Search LAUR


Advanced Search

Browse

My Account