Microstructure and Intermetallic Strengthening in an Equal Channel Angular Pressed AA2219. Part I: Microstructure Characterization

被引：3
作者：
Santecchia E. [1 ]
Mengucci P. [1 ]
Cabibbo M. [2 ]
机构：
[1] Dipartimento di Scienze e Ingegneria della Materia, dell'Ambiente ed Urbanistica (SIMAU), Università Politecnica delle Marche
[2] Dipartimento di Ingegneria Meccanica e Scienze Matematiche (DIISM), Università Politecnica delle Marche
来源：
Metallography, Microstructure, and Analysis | 2014年 / 3卷 / 03期
关键词：
Adiabatic heating; ECAP; FEGSEM; Intermetallics; Strengthening mechanisms; TEM;
D O I：
10.1007/s13632-014-0134-8
中图分类号：
学科分类号：
摘要：
In the present work, the strengthening effect of the Fe-rich intermetallic phases in a 2219 aluminium alloy subjected to equal channel angular pressing (ECAP) has been studied. Three different deformation conditions, corresponding to the as-extruded, ECAP route A-1 pass and ECAP route A-2 passes were considered. Microstructural characterization has been performed by light microscopy, transmission electron microscopy and scanning electron microscopy observations. All the contributions to the alloy strengthening, including solid solution, dislocation boundary, very fine particle precipitation induced by the adiabatic heating, equilibrium θ = Al2Cu secondary phase particles and the effect of the Fe-rich intermetallics, are discussed in this work. The resulting strengthening was evaluated and modelled in Part II. © 2014 Springer Science+Business Media New York and ASM International.
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页码：194 / 202
页数：8
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