Nanostructure and related mechanical properties of an Al-Mg-Si alloy processed by severe plastic deformation

被引：138

作者：

Nurislamova, Gulnaz ^{[1
,2
]}

Sauvage, Xavier ^{[1
]}

Murashkin, Maxim ^{[2
]}

Islamgaliev, Rinat ^{[2
]}

Valiev, Ruslan ^{[2
]}

机构：

[1] Univ Rouen, Inst Mat Res, CNRS, UMR,Grp Phys Mat, St Etienne, France

[2] Ufa State Aviat Tech Univ, Inst Phys Adv Mat, Ufa, Russia

来源：

PHILOSOPHICAL MAGAZINE LETTERS | 2008年 / 88卷 / 06期

关键词：

aluminium alloys; nanostructures; segregation;

D O I：

10.1080/09500830802186938

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructural features and mechanical properties of an Al-Mg-Si alloy processed by high-pressure torsion (HPT) have been investigated using transmission electron microscopy, X-ray diffraction, three-dimensional atom probe, tensile tests and micro-hardness measurements. It is shown that HPT processing of the Al-Mg-Si alloy leads to a much stronger grain size refinement than of pure aluminium (down to 100 nm). Moreover, massive segregation of alloying elements along grain boundaries is observed. This nanostructure exhibits a yield stress even two times higher than that after a standard T6 heat treatment of the coarse-grained alloy.

引用

页码：459 / 466

页数：8

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