The aging effect in an ultrafine-grained Al-5% Fe alloy produced by severe plastic deformation

被引：0

作者：

Stolyarov, V.V. ^{[1
]}

Soshnikova, E.P. ^{[1
]}

Brodova, I.G. ^{[1
]}

Bashlykov, D.V. ^{[1
]}

Kil'mametov, A.R. ^{[1
]}

机构：

[1] Ufa Technical Univ. of Aviation, ul. K. Marksa 12, Ufa, Bashkortostan, 450000, Russia

来源：

Fizika Metallov i Metallovedenie | 2002年 / 93卷 / 06期

关键词：

Aging of materials - Alloying elements - Iron - Microhardness - Microstructure - Plastic deformation - Thermal effects;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A new approach was employed to create a metastable supersaturated solid solution of iron in aluminum and to form a precipitation-strengthened ultrafine-grained (UFG) structure in the rapidly quenched Al-5 wt % Fe alloy using severe plastic deformation (SPD) by torsion under a high pressure. In the process of short-term heating in a temperature range of 20-450°C, structural changes in the samples thus deformed were studied by transmission electron microscopy, X-ray diffraction analysis, and differential scanning calorimetry. An UFG structure that consists of a supersaturated solid solution of iron in aluminum with an average grain size of 150 nm and refined intermetallic particles was shown to form in the hypereutectic two-phase alloy due to rapid quenching and SPD. The aging regimes that bring about a maximum strength of the alloy were determined. Time and temperature dependences of the microhardness were studied. It was shown that the high-strength state in the alloy may be realized after a combined treatment including rapid quenching, SPD, and aging.

引用

页码：74 / 81