A model for precipitation kinetics and strengthening in Al-Cu-Mg alloys

被引：138

作者：

Khan, I. N. ^{[1
]}

Starink, M. J. ^{[1
]}

Yan, J. L. ^{[1
]}

机构：

[1] Univ Southampton, Sch Engn Sci, Mat Res Grp, Southampton SO17 1BJ, Hants, England

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2008年 / 472卷 / 1-2期

关键词：

aluminium alloys; ageing; modelling; precipitation kinetics; co-clusters;

D O I：

10.1016/j.msea.2007.03.033

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A physically based numerical model is developed to predict the microstructural evolution and strengthening in Al-Cu-Mg alloys during isothermal treatments. The modelling of the formation kinetics of the precipitates is based on the Kampmann and Wagner model. The strengthening by the shearable Cu:Mg co-clusters is modelled on the basis of modulus strengthening mechanism and the strengthening by the non-shearable S phase precipitates is based on the Orowan looping mechanism. The model predictions are verified by comparing with the strength and differential isothermal calorimetery data on 2024-T351 aluminium alloys. The microstructural development and strength predictions of the model are generally in good agreement with the experimental data. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：66 / 74

页数：9

共 61 条

[1] DIFFUSION-LIMITED PHASE TRANSFORMATIONS - A COMPARISON AND CRITICAL EVALUATION OF MATHEMATICAL APPROXIMATIONS [J].

AARON, HB ;

FAINSTEIN, D ;

KOTLER, GR .

JOURNAL OF APPLIED PHYSICS, 1970, 41 (11) :4404-+

[2] Kinetics of phase change I - General theory [J].

Avrami, M .

JOURNAL OF CHEMICAL PHYSICS, 1939, 7 (12) :1103-1112

[3]

BAGARYATSKII YA, 1952, DOKL AKAD NAUK SSSR, V87, P559

[4] Modelling of precipitation reactions in industrial processing [J].

Bratland, DH ;

Grong, O ;

Shercliff, H ;

Myhr, OR ;

Tjotta, S .

ACTA MATERIALIA, 1997, 45 (01) :1-22

[5]

Cartaud L, 1976, P 4 INT C STRENGTH M, V1, P214

[6]

Christian JW, 1975, THEORY TRANSFORMATIO

[7] Self-consistent modelling of the plastic deformation of FCC polycrystals and its implications for diffraction measurements of internal stresses [J].

Clausen, B ;

Lorentzen, T ;

Leffers, T .

ACTA MATERIALIA, 1998, 46 (09) :3087-3098

[8]

Davis JR, 1993, ASM SPECIALITY HDB A

[9] Influence of predeformation and ageing of an Al-Zn-Mg alloy - II. Modeling of precipitation kinetics and yield stress [J].

Deschamps, A ;

Brechet, Y .

ACTA MATERIALIA, 1998, 47 (01) :293-305

[10] A yield strength model for the Al-Mg-Si-Cu alloy AA6111 [J].

Esmaeili, S ;

Lloyd, DJ ;

Poole, WJ .

ACTA MATERIALIA, 2003, 51 (08) :2243-2257

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