Study of the High-Temperature Behaviour of Aluminium Alloy En Aw 2014

Archives of Metallurgy and Materials

I. Pokorný¹  T. Kvačkaj¹  J. Bidulská¹  R. Bidulský²  M. Grande² 

[1] Faculty of Metallurgy, Department of Metals Forming, Technical University of Košsice, Letná 9, 042 00 Košsice, Slovakia;Politecnico Di Torino-Alessandria Campus, V. T. Michel 5, 15100 Alessandria, Italy

关键词: Keywords: aluminium alloy;    flow stress;    constitutive equation;    hot working;   

DOI  :  10.2478/v10172-011-0108-7

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The high-temperature behaviour of aluminium alloy EN AW 2014 was investigated in a wide range of deformation temperatures and strain rates. The influence of strain rate and temperature on the peak stress was analysed using the conventional constitutive equation (relating strain rate, flow stress, and temperature) and by means of precise definition of the peak stress value, in the non-linear regression model. Moreover, a study on apparent activation energy of EN AW 2014 stabilized by zirconium was carried out using Arrhenius-type plot. The stress-strain curves exhibit rapid increase up to the peak value followed by a gradual softening up to the material fracture, without the steady state usually observed before the fracture. In terms of formability maps, the presented experimental results exhibit a decrease of ductility, respectively with an increase of strain rate and a decrease of temperature, respectively.

【 授权许可】

Unknown