Influence of plastic deformation and Cu/Mg ratio on the strengthening mechanisms and precipitation behavior of AA2024 aluminum alloys

被引：55

作者：

Garcia-Hernandez, J. L. ^{[1
]}

Garay-Reyes, C. G. ^{[1
]}

Gomez-Barraza, I. K. ^{[2
]}

Ruiz-Esparza-Rodriguez, M. A. ^{[1
]}

Gutierrez-Castaneda, E. J. ^{[3
,4
]}

Estrada-Guel, I. ^{[1
]}

Maldonado-Orozco, M. C. ^{[2
]}

Martinez-Sanchez, R. ^{[1
]}

机构：

[1] Ctr Invest Mat Avanzados CIMAV, Lab Nacl Nanotecnol, Miguel de Cervantes 120, Chihuahua 31136, Chih, Mexico

[2] Univ Autonoma Chihuahua UACH, Fac Ingn, Circuito 1,Nuevo Campus Univ, Chihuahua 31125, Chih, Mexico

[3] Univ Autonoma San Luis Potosi, Inst Met, Ave Sierra Leona 550,Lomas 2da Secc, San Luis Potosi 78210, San Luis Potosi, Mexico

[4] Consejo Nacl Ciencia & Technol, Catedra CONACYT, Del Benito Juarez 03940, Mexico

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2019年 / 8卷 / 06期

关键词：

Aluminum alloy; Plastic deformation; Aging precipitation; Vickers microhardness; CU-MG ALLOY; COPPER; PHASE; WORK;

D O I：

10.1016/j.jmrt.2019.09.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The strengthening mechanisms and precipitation behavior in AA2024 alloys with different Cu/Mg ratios (3.18 and 2.48) and different levels of plastic deformation (5 and 15%) were studied by X-ray diffraction, transmission electron microscopy and Vickers microhardness measurements. Results demonstrate that hardening depends significantly on the interaction of different strengthening mechanisms such as solid-solution, strain hardening and precipitation. Hardness is mostly influenced by precipitation, which in turn is modified by plastic deformation and the Cu/Mg ratio. Modification of Cu and Mg content as well as plastic deformation affect the precipitation behavior of the Al2CuMg (S) phase, since these lead to significant changes in size and numeric density of the S precipitates. A higher number density and a smaller size of S precipitates are obtained in the alloy with lower Cu/Mg ratio and 15% of thickness reduction. (C) 2019 The Authors. Published by Elsevier B.V.

引用

页码：5471 / 5475

页数：5

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