AA 7055铝合金时效析出强化模型

陈军洲, 吕良星, 甄良, 戴圣龙

Precipitation Strengthening Model of AA 7055 Aluminium Alloy

CHEN Junzhou, LV Liangxing, ZHEN Liang, DAI Shenglong

表1 AA 7055铝合金120℃欠时效强化模型中用到的一些参数

Table 1 Summaries of input data using under-aged model for the AA 7055 Al alloy aged at 120oC

Parameter Value Data source Taylor factor M 3.06 Present model Coherency strain for η'εη' 0.0133 Present model Coherency strain for GPI εGPI 0.0025 Present model Constant depends on the precipitation κ 3.2 Present model Maximum volume fraction of whole precipitation fmax 0.1035 Ref.[13] Maximum volume fraction of the GPI zone fmax,?GPI 0.025 Present model Shear modulus G 27 GPa Ref.[25] Shear modulus between the η' and matrix ΔEη' 0.7 GPa Ref.[26] Shear modulus between the GPI zones and matrix ΔEGPI 1.5 GPa Present model Inherent strength of Al σi 15.7 MPa Ref.[27] Grain boundary strengthening value ΔσGB 22 MPa Present model Constant depends on the solute atoms C3 237.5 MPa Present model Magnitude of the Burgers vector b 0.286 nm Ref.[25]