Mechanical Properties of Ultra-Fine Grained Al-Li Alloys

Bogusława Adamczyk-Cieślak; Małgorzata Lewandowska; Jaroslaw Mizera; Krzysztof Jan Kurzydlowski

doi:10.4028/www.scientific.net/MSF.513.25

Paper Titles

Foreword

Nanocrystalline CuO_x-CeO₂ Systems: FTIR Analyses of Catalytic Reactions
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Microstructure, Properties and Biocompatibility of the Nitrided Ti-6Al-4V Alloy for Medical Application
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Mechanical Properties of Ultra-Fine Grained Al-Li Alloys
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Microstructure and Mechanical Properties of the Stainless Steels Obtained by Sintering Mixtures of AISI 316L and Silicon Powders
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Quantitative Description of the Structure and Substructure of Hot − Deformed Fe – Ni Austenitic Alloy
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Surface Heat Treatment Design Methodology of Large-Scale Castings
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Technological Surface Layer Selection for Small Module Pitches of Gear Wheels Working under Cyclic Contact Loads
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Change of Micromechanical Properties of Polyethylene Induced by a Tribological Process in Polymer/Metal System
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HomeMaterials Science ForumMaterials Science Forum Vol. 513Mechanical Properties of Ultra-Fine Grained Al-Li...

Mechanical Properties of Ultra-Fine Grained Al-Li Alloys

Abstract:

The results obtained in the present study reveal the effect of equal channel angular extrusion (ECAE) on the grain size and mechanical properties of Al-Li alloys. During 8 passes of ECAE process, coarse grain microstructure in the initial state transforms into ultrafine grained. The final grain size depends on both total strain applied and Li content in the alloy. Due to the grain refinement the microhardness and yield stress increase by 100%. During compression deformation, the coarse grain alloys exhibit continuous hardening, whereas in the ultrafine-grained alloys, a stagnation of work hardening at the beginning of compression deformation is observed. This behaviour is related to the dynamic recovery of the severely deformed microstructure.