Title: Comparison of different methods used to establish recrystallisation conditions of gold alloys

Authors: Daniele Maggian

Addresses: Progold S.r.l., Via Postale Vecchia 26/A, 36070 Trissino (VI), Italy

Abstract: Recrystallisation affects both the structure and the mechanical properties of metals. The knowledge of recrystallisation conditions for gold alloys is very important for optimising the production process. Recrystallisation conditions (temperature and time) depend on the type of alloy and the degree of deformation. The following methods for determination of recrystallisation characteristics will be compared: hardness measurements, metallographic investigation and differential thermal analysis. Samples are heat treated in cycles with temperature and time as variable. We will take into account 14 ct yellow alloy. They are tested with different procedures to allow the comparison of methods for determination of recrystallisation characteristics.

Keywords: differential thermal analysis; annealing; recovery; recrystallisation; grain size; nucleation; growth; diffusion; boundary migration; polygonisation; gold alloys; deformation; hardness; heat treatment.

DOI: 10.1504/IJMMP.2009.031135

International Journal of Microstructure and Materials Properties, 2009 Vol.4 No.3, pp.276 - 300

Published online: 21 Jan 2010 *

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