Effect of microstructure on the mirror-like surface quality of FCC and BCC metals

Prohaszka, J; Mamalis, AG; Horvath, M; Nyiro, J; Dobranszky, J

dc.contributor.author	Prohaszka, J	en
dc.contributor.author	Mamalis, AG	en
dc.contributor.author	Horvath, M	en
dc.contributor.author	Nyiro, J	en
dc.contributor.author	Dobranszky, J	en
dc.date.accessioned	2014-03-01T01:24:03Z
dc.date.available	2014-03-01T01:24:03Z
dc.date.issued	2006	en
dc.identifier.issn	1042-6914	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17185
dc.subject	Crystal orientation	en
dc.subject	EBSD measurement	en
dc.subject	FCC and BCC metals	en
dc.subject	Grain boundary	en
dc.subject	Mirror-like surface	en
dc.subject	Surface integrity	en
dc.subject	Ultraprecision machining	en
dc.subject.classification	Engineering, Manufacturing	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.other	Crystal orientation	en
dc.subject.other	Crystal structure	en
dc.subject.other	Grain boundaries	en
dc.subject.other	Microstructure	en
dc.subject.other	Mirrors	en
dc.subject.other	Optical microscopy	en
dc.subject.other	Scanning electron microscopy	en
dc.subject.other	EBSD measurement	en
dc.subject.other	Mirror-like surfaces	en
dc.subject.other	Surface integrity	en
dc.subject.other	Ultraprecision machining	en
dc.subject.other	Metal analysis	en
dc.title	Effect of microstructure on the mirror-like surface quality of FCC and BCC metals	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/10426910600837806	en
heal.identifier.secondary	http://dx.doi.org/10.1080/10426910600837806	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	The microstructure of machined metals changes near the tool-affected zone. This paper presents some new results concerning mirror-like surface cutting of aluminum, copper and tungsten. The microstructure of aluminum and copper represents polycrystalline mild metals with face centered cubic (FCC) crystal structure. Examination of a mirror-like surface by optical microscopy, scanning electron microscopy (SEM), electron backscattered diffraction and atomic force microscopy revealed that grain boundaries and twin boundaries were present, which separates two domains for different crystal orientation. The Young's modulus that depends on orientation can change considerably on these boundaries and, consequently, the value of elastic deformation of the layer under the machined surface. This effect modified the roughness. Ultraprecision machining of tungsten, which is a body centered cubic (BCC) metal, proved useless using diamond and/or boron-nitride tools. Since tungsten is a very brittle metal at room temperature, its ductile to brittle transition temperature is much higher. Therefore, in contrast to normal cutting, the material that is incapable of plastic deformation will cause brittle fracture of the chip and bad surface quality.	en
heal.publisher	TAYLOR & FRANCIS INC	en
heal.journalName	Materials and Manufacturing Processes	en
dc.identifier.doi	10.1080/10426910600837806	en
dc.identifier.isi	ISI:000242359800016	en
dc.identifier.volume	21	en
dc.identifier.issue	8	en
dc.identifier.spage	810	en
dc.identifier.epage	818	en