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Effect of precipitation during quenching on the mechanical properties of the aluminium alloy 7010 in the W-temper

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posted on 2014-03-04, 09:19 authored by David A. Tanner, J.S. Robinson
Residual stress magnitudes in quenched high-strength aluminium alloys determined by several researchers using a variety of techniques indicate values that far exceed the as measured yield strength of the material in the quenched condition. Some research has indicated that the high residual stress magnitudes in large forgings may partly occur as a result of precipitation during the quench. To investigate this theory, a novel Jominy end quench technique is used to determine the hardness of aluminium alloy 7010 as a function of cooling rate. Cooling curves have been measured for Jominy end quench type samples using deeply buried thermocouples and are compared with finite element model predictions. Tensile properties are also determined for samples quenched into boiling water and compared with samples quenched into cold water. Vickers hardness and X-ray diffraction residual stress measurements are undertaken on samples of varying size acting as a comparison with the Jominy results to indicate how both homogenous and heterogeneous precipitation lead to increased as quenched mechanical strengths. (C) 2004 Elsevier B.V. All rights reserved.

History

Publication

Journal of Materials Processing Technology;153-154, (10), pp. 998-1004

Publisher

Elsevier

Note

peer-reviewed

Rights

This is the author’s version of a work that was accepted for publication in . Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Materials Processing Technology, 153-154, (10), pp. 998-1004, http://dx.doi.org/10.1016/j.jmatprotec.2004.04.226

Language

English

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