Strain Compensation of the Constitutive Equation for High Temperature Flow Stress of a Al-Cu-Li Alloy

被引：29

作者：

Ou, Ling ^{[1
,2
,3
]}

Nie, Yufeng ^{[1
,2
]}

Zheng, Ziqiao ^{[1
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

[2] Hunan Univ Technol, Sch Met Engn, Zhuzhou 412000, Peoples R China

[3] Cent South Univ, Mittal Met Ind Res, Changsha 410083, Peoples R China

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2014年 / 23卷 / 01期

关键词：

activation energy; Al-Cu-Li alloy; constitutive equation; flow stress; HOT-WORKING; DEFORMATION; ALUMINUM; PREDICTION; AEROSPACE;

D O I：

10.1007/s11665-013-0747-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In order to study the workability of a Al-Cu-Li alloy, isothermal hot compressive deformation was investigated in the temperature range of 350-500 A degrees C at strain rates in the range of 0.01-10/s up to a true strain of 0.9 on Gleeble-1500 mechanical testing machine. The flow stress increased rapidly to a peak value. The peak stress decreased with increasing deformation temperature and decreasing strain rate. The effects of strain rate and temperature on hot deformation behavior can be represented by a Zener-Hollomon parameter including an Arrhenius term. The influence of the strain has also been incorporated in the constitutive equation and four material constants alpha, n, A, and the activation energy Q were calculated by compensation of strain. The proposed constitutive equation (considering the compensation of strain) gives an accurate description for the flow stress of the Al-Cu-Li alloy.

引用

页码：25 / 30

页数：6

共 27 条

[1] Comparison of torsion and compression constitutive analyses for elevated temperature deformation of Al-Li-Cu-Mn alloy
Avramovic-Cingara, G
McQueen, HJ
Perovic, DD
[J]. MATERIALS SCIENCE AND TECHNOLOGY, 2003, 19 (01) : 11 - 19
[2] Hot deformation mechanisms of a solution-treated Al-Li-Cu-Mg-Zr alloy
AvramovicCingara, G
Perovic, DD
McQueen, HJ
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (11): : 3478 - 3490
[3] Development of constitutive equations for modelling of hot rolling
Davenport, SB
Silk, NJ
Sparks, CN
Sellars, CM
[J]. MATERIALS SCIENCE AND TECHNOLOGY, 2000, 16 (05) : 539 - 546
[4] The influence of the constitutive equation on the simulation of a hot rolling process
Duan, XJ
Sheppard, T
[J]. JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 2004, 150 (1-2) : 100 - 106
[5] EVANS RW, 1971, J I MET, V99, P4
[6] Development and characterization of Al-Li alloys
Gupta, RK
Nayan, N
Nagasireesha, G
Sharma, SC
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 420 (1-2): : 228 - 234
[7] Jonas J.J., 1969, Metall Rev, V14, P1, DOI [10.1179/095066069790138056, DOI 10.1179/095066069790138056]
[8] PREDICTION OF STEEL FLOW STRESSES AT HIGH-TEMPERATURES AND STRAIN RATES
LAASRAOUI, A
JONAS, JJ
[J]. METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1991, 22 (07): : 1545 - 1588
[9] A new mathematical model for predicting flow stress of typical high-strength alloy steel at elevated high temperature
Lin, Y. C.
Liu, Ge
[J]. COMPUTATIONAL MATERIALS SCIENCE, 2010, 48 (01) : 54 - 58
[10] Constitutive analysis in hot working
McQueen, HJ
Ryan, ND
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 322 (1-2): : 43 - 63

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