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

被引：4

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.

引用

页数：7

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