Mechanical behaviour of aircraft relevant aluminium wrought alloys at low temperatures

Schneider, R, Heine, B, Grant, Richard J and Zouaoui, Zoubir (2013) Mechanical behaviour of aircraft relevant aluminium wrought alloys at low temperatures. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications. ISSN 1464-4207

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Abstract

The mechanical behaviour of the commercial aluminium alloys EN AW-5182, EN AW-6016 and EN AW-7021 is investigated at temperatures ranging from 298 to 77 K and strain rates from 1.7 × 10−3 to 6.6 × 10−2 s−1. A device that allows testing at cryogenic temperatures is developed and demonstrated, where the specimens are subject to uniaxial tensile loads. The influence of a solution heat treatment for precipitation hardenable alloys is shown. The strain-hardening coefficient is determined and mapped in terms of the experimentally investigated uniform elongation. The experimental data of tested aluminium alloys are compared with EN AW-1050A-H14, which is used as a reference. The effect of the Portevin–LeChatelier effect on ductility and strength is discussed. The Ludwik relationship is adapted to describe materials showing a Portevin–LeChatelier effect.

Item Type: Article
Keywords: Aluminium alloys, cryogenic forming, Portevin-LeChatelier effect, Cottrell-atmosphere, forest dislocation, Ludwik, flow curves
Divisions: Applied Science, Computing and Engineering
Depositing User: Mr Stewart Milne
Date Deposited: 12 Mar 2015 16:14
Last Modified: 19 Dec 2017 15:31
URI: http://glyndwr.repository.guildhe.ac.uk/id/eprint/8276

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