Material modelling and its application to creep-age forming of aluminium alloy 7B04

被引：3
|
作者：
Lam, Aaron C. L. [1 ]
Shi, Zhusheng [1 ]
Huang, Xia [2 ]
Yang, Yo-Lun [1 ]
Zeng, Yuansong [2 ]
Lin, Jianguo [1 ]
机构：
[1] Imperial Coll London, Dept Mech Engn, London SW7 2AZ, England
[2] AVIC Beijing Aeronaut Mfg Technol Res Inst, Beijing 100024, Peoples R China
来源：
MANUFACTURING REVIEW | 2015年 / 2卷
关键词：
Creep-age forming; Material modelling; Process modelling; Aluminium alloy 7B04;
D O I：
10.1051/mfreview/2015022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Creep-ageing behaviour of aluminium alloy 7B04-T651 at 115 degrees C under a range of tensile stress levels has been experimentally investigated and numerically modelled for creep-age forming (CAF) applications. Creep strain, yield strength evolution and precipitate growth of creep-aged specimens were investigated. The alloy was modelled using a set of unified constitutive equations, which captures its creep deformation and takes into account yield strength contributions from three creep-age hardening mechanisms. Applications of the present work are demonstrated by implementing the determined material model into a commercial finite element analysis solver to analyse CAF operations carried out in a novel flexible CAF tool. Stress relaxation, yield strength, precipitate size and spring-back were predicted for the creep-age formed plates. The predicted spring-back were further quantified and compared with experimental measurements and a good agreement of 2.5% deviation was achieved. This material model now enables further investigations of 7B04 under various CAF scenarios to be conducted inexpensively via computational modelling.
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页数：7
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