Paper Title:
Enhanced Thermal Stability and Mechanical Properties of Ultrafine-Grained Aluminum Alloy
  Abstract

The paper reports on microstructure, strength and fatigue of ultrafine-grained (UFG) samples of the Al-Cu-Mg-Si aluminum alloy processed by high pressure torsion (HPT) at various temperatures. Application of the HPT treatment led to strong grain refinement, as well as to a raise of the mean-root square strains and dynamic precipitation. In case of optimal HPT treatment the UFG samples have demonstrated the enhanced thermal stability, an increase in ultimate tensile strength in 2.5 times and enhancement in fatigue endurance limit by 20 % in comparison with coarse-grained alloy subjected to standard treatment. It is shown that the regime of the HPT treatment governs the volume fraction of precipitates and segregations, thereby affecting a grain size and thermal stability of ultrafine-grained structure.

  Info
Periodical
Materials Science Forum (Volumes 667-669)
Edited by
Jing Tao Wang, Roberto B. Figueiredo and Terence G. Langdon
Pages
331-336
DOI
10.4028/www.scientific.net/MSF.667-669.331
Citation
R. K. Islamgaliev, M. A. Nikitina, A. F. Kamalov, "Enhanced Thermal Stability and Mechanical Properties of Ultrafine-Grained Aluminum Alloy", Materials Science Forum, Vols. 667-669, pp. 331-336, 2011
Online since
December 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yuichi Miyahara, Kazuhiko Adachi, Yasuhiro Maehara, Z. Horita, Terence G. Langdon
Abstract:A commercial AZ31 Mg alloy was subjected to ECAP (equal-channel angular pressing) and the tensile properties were examined at room...
473
Authors: M. Kolář, Vladivoj Očenášek, J. Uhlíř, Ivana Stulíková, Bohumil Smola, Martin Vlach, V. Neubert, K. Šperlink
Abstract:The influence of plastic deformation and heat-treatment on the precipitation of Al3(Sc, Zr) particles and the effect of these precipitates...
357
Authors: Dalibor Vojtěch, Alena Michalcová
Abstract:Nearly equi-atomic Ni-Ti alloys (nitinol) show shape memory behavior, superelasticity, high strength, excellent corrosion resistance and...
471
Authors: N.I. Vlasova, V.S. Gaviko, A.G. Popov, N.N. Shchegoleva, L.A. Stashkova, Dmitriy Gunderov, Xavier Sauvage
Abstract:Equiatomic FePd alloy in the ordered state has been processed by means of high-pressure torsion deformation (HPTD) and then annealed. X-ray...
392
Authors: Rustam Hairullin, Anna Kozelskaya, Marina Kazachenok
Chapter 1: Research and Development of Engineering Materials and Processing Technologies
Abstract:The grain size effect on surface morphology, microstructure and mechanical properties of commercial purity titanium specimens subjected to...
12