Effects of quench rate and natural ageing on the age hardening behaviour of aluminium alloy AA6060
作者： Katharina Strobel , Matthew D.H. Lay , Mark A. Easton , Lisa Sweet , Suming Zhu
DOI: 10.1016/J.MATCHAR.2015.11.009
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摘要: Abstract Quench sensitivity in Al–Mg–Si alloys has been largely attributed to the solute loss at heterogeneous nucleation sites, primarily dispersoids, during slow cooling after extrusion. As such, number density of type and concentration are considered be key variables for quench sensitivity. In this study, influence natural ageing a lean alloy, AA6060, which contains few have investigated by hardness measurement, thermal analysis, transmission electron microscopy (TEM) positron annihilation lifetime spectroscopy (PALS). It is shown that alloy associated with degree supersaturation vacancies cooling. Due vacancy clustering ageing, more pronounced short time (30 min) compared longer (24 h). Therefore, prolonged not only leads an increase hardness, but can also positive effect on alloys.
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C.S.T. Chang, I. Wieler, N. Wanderka, J. Banhart, Positive effect of natural pre-ageing on precipitation hardening in Al-0.44at% Mg-0.38at% Si alloy. Ultramicroscopy. ,vol. 109, pp. 585- 592 ,(2009) , 10.1016/J.ULTRAMIC.2008.12.002
Yücel Birol, Restoration of the bake hardening response in a naturally aged twin-roll cast AlMgSi automotive sheet Scripta Materialia. ,vol. 54, pp. 2003- 2008 ,(2006) , 10.1016/J.SCRIPTAMAT.2006.03.022
F.D. Fischer, J. Svoboda, F. Appel, E. Kozeschnik, Modeling of excess vacancy annihilation at different types of sinks Acta Materialia. ,vol. 59, pp. 3463- 3472 ,(2011) , 10.1016/J.ACTAMAT.2011.02.020
M Murayama, K Hono, M Saga, M Kikuchi, Atom probe studies on the early stages of precipitation in Al-Mg-Si alloys Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. ,vol. 250, pp. 127- 132 ,(1998) , 10.1016/S0921-5093(98)00548-6
J M Campillo Robles, E Ogando, F Plazaola, Calculation of positron characteristics for elements of the periodic table Journal of Physics: Conference Series. ,vol. 265, pp. 012006- ,(2011) , 10.1088/1742-6596/265/1/012006
Katharina Strobel, Elizabeth Sweet, Mark Easton, Jian Feng Nie, Malcolm Couper, Dispersoid Phases in 6xxx Series Aluminium Alloys Materials Science Forum. ,vol. 654656, pp. 926- 929 ,(2010) , 10.4028/WWW.SCIENTIFIC.NET/MSF.654-656.926
Jostein Røyset, Tore Stene, Jan Anders Sæter, Oddvin Reiso, The Effect of Intermediate Storage Temperature and Time on the Age Hardening Response of Al-Mg-Si Alloys Materials Science Forum. pp. 239- 244 ,(2006) , 10.4028/WWW.SCIENTIFIC.NET/MSF.519-521.239
Katharina Strobel, Mark A. Easton, Lisa Sweet, Malcolm J. Couper, Jian-Feng Nie, Relating quench sensitivity to microstructure in 6000 series aluminium alloys Materials Transactions. ,vol. 52, pp. 914- 919 ,(2011) , 10.2320/MATERTRANS.L-MZ201111
A. Dupasquier, G. Kögel, A. Somoza, Studies of light alloys by positron annihilation techniques Acta Materialia. ,vol. 52, pp. 4707- 4726 ,(2004) , 10.1016/J.ACTAMAT.2004.07.004
C. Wolverton, Solute–vacancy binding in aluminum Acta Materialia. ,vol. 55, pp. 5867- 5872 ,(2007) , 10.1016/J.ACTAMAT.2007.06.039