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《Materials for Mechanical Engineering》 2013-05
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Creep Ageing Behavior and Constitutive Equation of 2524 Aluminum Alloy

ZHAN Li-hua,LI Jie,HUANG Ming-hui(State Key Laboratory of High Performance and Complex Manufacturing,School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China)  
The creep ageing behavior of 2524 aluminum alloy was studied at ageing temperature range from 453 K to 473 K and stress range from 140 MPa to 210 MPa using electronic creep testing machine.By adopting the equations including hyperbolic sine function and by linear regression analysis of experimental data,the constitutive relationship among steady creep strain rate,tested stress and ageing temperature of 2524 aluminum alloy was obtained.The results show that steady creep rate increased with the increase of tested stress and ageing temperature,and the second step in creep curves became short.The relative error of steady creep strain rate between theoretical value computed by the constitutive equation and actual value was only 6.9%,and the constitutive equation could provide theoretical basis for formulating creep ageing forming processing of 2524 aluminum alloy.
【Fund】: 国家自然科学基金重点资助项目(2010CB731702)
【CateGory Index】: TG146.21
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