Analysis of the Combined Strengthening Effect of Solute Atoms and Precipitates on Creep of Aluminum Alloys

被引：7

作者：

Fernandez, Ricardo ^{[1
]}

Bokuchava, Gizo ^{[2
]}

Toda-Caraballo, Isaac ^{[1
]}

Bruno, Giovanni ^{[3
,4
]}

Turchenko, Vitalii ^{[2
]}

Gorshkova, Yulia ^{[2
]}

Gonzalez-Doncel, Gaspar ^{[1
]}

机构：

[1] CSIC, Dept Met Phys, Ctr Nacl Invest Met CENIM, Ave Gregorio Amo 8, E-28040 Madrid, Spain

[2] Joint Inst Nucl Res, Frank Lab Neutron Phys, Joliot Curie Str 6, Dubna 141980, Russia

[3] Bundesanstalt Mat Forsch & Prufung BAM, Unter Eichen 87, D-12200 Berlin, Germany

[4] Univ Potsdam, Inst Phys & Astron, Karl Liebknecht Str 24-25, D-14476 Golm, Germany

来源：

ADVANCED ENGINEERING MATERIALS | 2020年 / 22卷 / 04期

关键词：

aluminum; creep; diffraction; precipitation; solute atoms; STEADY-STATE CREEP; CU-MG ALLOY; HOT DEFORMATION; LATTICE-PARAMETER; SINGLE-CRYSTALS; HEAT-TREATMENT; AS-CAST; AL; BEHAVIOR; STRESS;

D O I：

10.1002/adem.201901355

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The creep strengthening mechanisms in (age-hardenable) aluminum alloys are analyzed on the basis of a new microstructural study of powder samples, an analysis of a comprehensive revision of creep data from the literature, and a new modeling approach. A strategy based on the strength difference (SD) method to separate the contributions of solid solution atoms and precipitates to creep strengthening is proposed. The new methodology considers the combination of the two contributions avoiding the need of a threshold stress term in the creep equation. The contribution of both precipitates and solid solution is taken into account by means of the analysis of the lattice parameter variation with aging time. For this study, powders of two commercial AA2xxx alloys have been analyzed using diffraction methods. The experimental results are modeled using Lubarda's approach combined with the SD method.

引用

页数：12

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