Creep and Creep-rupture Behavior of 2124-T851 Aluminum Alloy

被引：18

作者：

Jiang, Yu-Qiang ^{[1
,2
]}

Lin, Y. C. ^{[1
,2
]}

Phaniraj, C. ^{[3
]}

Xia, Yu-Chi ^{[1
,2
]}

Zhou, Hua-Min ^{[4
]}

机构：

[1] Cent S Univ, Sch Mech & Elect Engn, Changsha 410083, Hunan, Peoples R China

[2] State Key Lab High Performance Complex Mfg, Changsha 410083, Hunan, Peoples R China

[3] Indira Gandhi Ctr Atom Res, Mat Technol Div, Kalpakkam 603102, Tamil Nadu, India

[4] State Key Lab Mat Proc & & Die Mould Technol, Wuhan 430074, Peoples R China

来源：

HIGH TEMPERATURE MATERIALS AND PROCESSES | 2013年 / 32卷 / 06期

关键词：

aluminum alloy; power-law creep; Monkman-Grant relation; useful creep life; CURVE SHAPE ANALYSES; PRACTICAL IMPLICATIONS; MECHANICAL-PROPERTIES; DEFORMATION;

D O I：

10.1515/htmp-2012-0172

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High temperature creep and useful creep life behavior of Al-Cu-Mg (2124-T851 aluminum) alloy was investigated by conducting constant stress uniaxial tensile creep tests at different temperatures (473-563 K) and at stresses ranging from 80 to 200 MPa. It was found that the stress and temperature dependence of minimum creep rate could be successfully described by the power-law creep equation. The power-law stress exponent, n = 5.2 and the activation energy for secondary creep, Q = 164 kJ mol(-1), which is close to that observed for self diffusion of aluminum (similar to 140 kJ mol(-1)). The observed values of n and Q suggest that the secondary creep of 2124-T851 aluminum alloy is governed by the lattice diffusion controlled dislocation climb process. A Monkman-Grant type relationship between minimum creep rate and time for reaching 1.5% creep strain is proposed and could be employed for predicting the useful creep life of 2124-T851 aluminum alloy.

引用

页码：533 / 540

页数：8

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