About: Characterisation of Al-Cu and Al-Mg-Si Free-Cutting Alloys

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Free cutting alloys of Al-Cu (AA2011 and AA2111B) in T6 temper and Al-Mg-Si system (AA6023 and AA6262) in tempers T6 and T8 were subjected to Charpy U - notch impact testing at the temperatures ranging from 20°C to 350°C. The microstructure of the materials was characterized by light metallography, fracture surfaces were observed using scanning electron microscope (SEM). The alloys showed a significant decrease in the impact energy KU at temperatures ~125°C (AA2011, AA2111B), ~170°C (AA6023), and ~250°C (AA6262), respectively. This decrease of KU was caused by melting of disperse phases containing low-melting point metals (Pb, Sn, Bi), which was confirmed by differential scanning calorimetry. Additional annealing of the AA6262-T8 alloy for 2h at 400°C followed by slow cooling led to the transformation of Pb + Bi particles accompanied by the shift of the melting temperature from ~250 to ~310 °C. Higher temperature solution annealing of the AA6023 alloy for 30 min at 540°C (as a replacement of common 30 min at 520°C) resulted in a partial transformation of Sn + Bi particles accompanied by melting point shift from ~170 to ~200°C. Chemical composition of the corresponding phases was monitored by energy dispersive X-ray spectroscopy in SEM. Free cutting alloys of Al-Cu (AA2011 and AA2111B) in T6 temper and Al-Mg-Si system (AA6023 and AA6262) in tempers T6 and T8 were subjected to Charpy U - notch impact testing at the temperatures ranging from 20°C to 350°C. The microstructure of the materials was characterized by light metallography, fracture surfaces were observed using scanning electron microscope (SEM). The alloys showed a significant decrease in the impact energy KU at temperatures ~125°C (AA2011, AA2111B), ~170°C (AA6023), and ~250°C (AA6262), respectively. This decrease of KU was caused by melting of disperse phases containing low-melting point metals (Pb, Sn, Bi), which was confirmed by differential scanning calorimetry. Additional annealing of the AA6262-T8 alloy for 2h at 400°C followed by slow cooling led to the transformation of Pb + Bi particles accompanied by the shift of the melting temperature from ~250 to ~310 °C. Higher temperature solution annealing of the AA6023 alloy for 30 min at 540°C (as a replacement of common 30 min at 520°C) resulted in a partial transformation of Sn + Bi particles accompanied by melting point shift from ~170 to ~200°C. Chemical composition of the corresponding phases was monitored by energy dispersive X-ray spectroscopy in SEM. (en)
Title	Characterisation of Al-Cu and Al-Mg-Si Free-Cutting Alloys Characterisation of Al-Cu and Al-Mg-Si Free-Cutting Alloys (en)
skos:prefLabel	Characterisation of Al-Cu and Al-Mg-Si Free-Cutting Alloys Characterisation of Al-Cu and Al-Mg-Si Free-Cutting Alloys (en)
skos:notation	RIV/68407700:21340/14:00223499!RIV15-MSM-21340___
http://linked.open...avai/riv/aktivita	S
http://linked.open...avai/riv/aktivity	S
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Nejezchlebová, Jitka Haušild, Petr Karlík, Miroslav
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta jaderná a fyzikálně inženýrská
http://linked.open...dnocenehoVysledku	6884
http://linked.open...ai/riv/idVysledku	RIV/68407700:21340/14:00223499
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Differential scanning calorimetry; Liquid metal embrittlement; Mechanical properties; Metallography (en)
http://linked.open.../riv/klicoveSlovo	Mechanical properties Metallography Differential scanning calorimetry Liquid metal embrittlement
http://linked.open...ontrolniKodProRIV	[C41392210FE4]
http://linked.open...v/mistoKonaniAkce	Trondheim
http://linked.open...i/riv/mistoVydani	zurich
http://linked.open...i/riv/nazevZdroje	14th International Conference on Aluminium Alloys
http://linked.open...in/vavai/riv/obor	JG
http://linked.open...ichTvurcuVysledku	3 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Haušild, Petr Karlík, Miroslav Harcuba, P. Faltus, J. Nejezchlebová, Jitka
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open...ain/vavai/riv/wos	000348897900195
http://linked.open.../riv/zahajeniAkce	2014-06-15 (xsd:date)
issn	0255-5476
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.4028/www.scientific.net/MSF.794-796.1181
http://purl.org/ne...btex#hasPublisher	Trans Tech Publications
https://schema.org/isbn	978-3-03835-120-7
http://localhost/t...ganizacniJednotka	21340

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