Extended application of a unified creep-ageing constitutive model to multistep heat treatment of aluminium alloys
作者： Yong Li , Zhusheng Shi , Jianguo Lin , Yo-Lun Yang , Qi Rong
DOI: 10.1016/J.MATDES.2017.03.023
关键词: Materials science 、 Precipitation hardening 、 Aluminium 、 Creep 、 Constitutive equation 、 Ageing 、 Hardening (metallurgy) 、 Alloy 、 Metallurgy 、 Aluminium alloy
摘要: Abstract A recently developed unified constitutive model for creep-ageing of an Al-Cu-Li alloy (AA2050-T34) has been successfully extended to applications multistep heat treatments aluminium alloys, including natural and artificial ageing with simple complex hardening evolution different initial temper conditions. An age both was proposed based on the methods determine equilibrium values micro macro variables alloys under general heat-treated conditions were presented. By unifying normalised microstructural throughout treatments, able predict strengthening various during creep-ageing. number case studies carried out ageing, some typical heat-treatable 2xxx (Al-Cu-Mg Al-Cu-Li) 7xxx (Al-Zn-Mg) as-quenched, naturally-aged (T3/T4) peak-aged (T6/T8) Excellent agreement achieved between experimental simulation results.
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