. . "978-3-03835-120-7" . . . "3"^^ . "Trans Tech Publications" . "Characterisation of Al-Cu and Al-Mg-Si Free-Cutting Alloys" . "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\u00B0C to 350\u00B0C. 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\u00B0C (AA2011, AA2111B), ~170\u00B0C (AA6023), and ~250\u00B0C (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\u00B0C followed by slow cooling led to the transformation of Pb + Bi particles accompanied by the shift of the melting temperature from ~250 to ~310 \u00B0C. Higher temperature solution annealing of the AA6023 alloy for 30 min at 540\u00B0C (as a replacement of common 30 min at 520\u00B0C) resulted in a partial transformation of Sn + Bi particles accompanied by melting point shift from ~170 to ~200\u00B0C. Chemical composition of the corresponding phases was monitored by energy dispersive X-ray spectroscopy in SEM." . "Faltus, J." . . "Harcuba, P." . . "Hau\u0161ild, Petr" . "[C41392210FE4]" . . "Karl\u00EDk, Miroslav" . "zurich" . . . . "0255-5476" . . . "6884" . "RIV/68407700:21340/14:00223499!RIV15-MSM-21340___" . . . "RIV/68407700:21340/14:00223499" . "6"^^ . . . "2014-06-15+02:00"^^ . "Trondheim" . "Characterisation of Al-Cu and Al-Mg-Si Free-Cutting Alloys"@en . "Characterisation of Al-Cu and Al-Mg-Si Free-Cutting Alloys"@en . . "Characterisation of Al-Cu and Al-Mg-Si Free-Cutting Alloys" . "Differential scanning calorimetry; Liquid metal embrittlement; Mechanical properties; Metallography"@en . . "5"^^ . "21340" . "000348897900195" . "S" . "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\u00B0C to 350\u00B0C. 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\u00B0C (AA2011, AA2111B), ~170\u00B0C (AA6023), and ~250\u00B0C (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\u00B0C followed by slow cooling led to the transformation of Pb + Bi particles accompanied by the shift of the melting temperature from ~250 to ~310 \u00B0C. Higher temperature solution annealing of the AA6023 alloy for 30 min at 540\u00B0C (as a replacement of common 30 min at 520\u00B0C) resulted in a partial transformation of Sn + Bi particles accompanied by melting point shift from ~170 to ~200\u00B0C. Chemical composition of the corresponding phases was monitored by energy dispersive X-ray spectroscopy in SEM."@en . "10.4028/www.scientific.net/MSF.794-796.1181" . "14th International Conference on Aluminium Alloys" . "Nejezchlebov\u00E1, Jitka" .