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Fracture behaviour of P/M Cr-V ledeburitic steel with different surface roughness
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SYSNO ASEP 0361261 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Fracture behaviour of P/M Cr-V ledeburitic steel with different surface roughness Tvůrce(i) Jurči, P. (CZ)
Dlouhý, Ivo (UFM-A) RID, ORCIDZdroj.dok. Materiálové inžinierstvo - Materials Engineering - ISSN 1335-0803
-, č. 18 (2011), s. 36-43Poč.str. 8 s. Jazyk dok. eng - angličtina Země vyd. SK - Slovensko Klíč. slova PM Cr-V ledeburitic steel ; Microstructure ; Surface roughness ; Three point bending strength ; Fractography Vědní obor RIV JG - Hutnictví, kovové materiály CEP GA101/09/1821 GA ČR - Grantová agentura ČR CEZ AV0Z20410507 - UFM-A (2005-2011) Anotace The samples made from the Vanadis 6 PM ledeburitic tool steel were surface machined to different quality and heat treated by standard regime of the processing. Three point bending tests were carried out on processed samples. It was found that the flexural strength decreased with decreasing surface quality. The lowering of flexural strength has been accompanied with the decrease of the plastic component of plastic straining preceeding to fracture initiation (work of fracture) of the material. It indicates that the surface roughness leads to the crack initiation before a larger plastic deformation of the material can be developed. Based on the results it can be suggested that to prevent the cracking of tools in the practice it is essential to make a surfaře machining (grinding, lapping, polishing) to as high quality as possible. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2012
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