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dc.contributor.authorZhao, ZJen_US
dc.contributor.authorTo, Sen_US
dc.contributor.authorZhuang, ZXen_US
dc.identifier.citationMicromachines, 2019, v. 10, no. 3, 197en_US
dc.description.abstractThe formation of serrated chips is an important feature during machining of difficult-to-cut materials, such as titanium alloy, nickel based alloy, and some steels. In this study, Ti6Al4V alloys with equiaxial and acicular martensitic microstructures were adopted to analyze the effects of material structures on the formation of serrated chips in straight line micro orthogonal machining. The martensitic alloy was obtained using highly efficient electropulsing treatment (EPT) followed by water quenching. The results showed that serrated chips could be formed on both Ti6Al4V alloys, however the chip features varied with material microstructures. The number of chip segments per unit length of the alloy with martensite was more than that of the equiaxial alloy due to poor ductility. Besides, the average cutting and thrust forces were about 8.41 and 4.53 N, respectively, for the equiaxed Ti6Al4V alloys, which were consistently lower than those with a martensitic structure. The high cutting force of martensitic alloy is because of the large yield stress required to overcome plastic deformation, and this force is also significantly affected by the orientations of the martensite. Power spectral density (PSD) analyses indicated that the characteristic frequency of cutting force variation of the equiaxed alloy ranged from 100 to 200 Hz, while it ranged from 200 to 400 Hz for workpieces with martensites, which was supposedly due to the formation of serrated chips during the machining process.en_US
dc.description.sponsorshipDepartment of Building Services Engineeringen_US
dc.publisherMolecular Diversity Preservation International (MDPI)en_US
dc.rights© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open accessen_US
dc.rightsThe following publication Zhao Z, To S, Zhuang Z. Serrated Chips Formation in Micro Orthogonal Cutting of Ti6Al4V Alloys with Equiaxial and Martensitic Microstructures. Micromachines. 2019; 10(3):197 is available at
dc.subjectCutting and thrust forcesen_US
dc.subjectMicro orthogonal machiningen_US
dc.subjectSerrated chipsen_US
dc.subjectTi6Al4V alloyen_US
dc.titleSerrated chips formation in micro orthogonal cutting of Ti6Al4V alloys with equiaxial and martensitic microstructuresen_US
dc.typeJournal/Magazine Articleen_US
dc.description.validate201906 bcma-
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