THE EFFECTS OF CORROSION AND CONSERVATION TREATMENTS ON NON‐DESTRUCTIVE NEUTRON DIFFRACTION ANALYSIS OF ARCHAEOLOGICAL COPPER ALLOYS: PRELIMINARY RESULTS* |
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| Authors: | L D FRAME I C FREESTONE SHU YAN ZHANG M NICHOLAS |
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| Institution: | 1. School of History, Archaeology and Religion, Cardiff University, Humanities Building, Colum Drive, Cardiff CF10 3EU, UK;2. University College London, Institute of Archaeology, 31‐34 Gordon Square, London WC1B 3DG, UK;3. ISIS Facility, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0QX, UK |
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| Abstract: | Analysis of residual stress in archaeological copper alloy artefacts by neutron diffraction has considerable potential for the investigation of early fabrication processes. However, residual stresses in metals are known to relax due to conditions similar to those encountered during burial, corrosion and conservation. In this pilot study, we investigate the effects of corrosion and conservation on a small group of replica copper ingots. Although corrosion and light cleaning do indeed cause some relaxation of stresses in the metal, corrosion having the most significant effect, the basic patterns and major features of the stress profiles may still be seen. |
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| Keywords: | COPPER ALLOY BRONZE TECHNOLOGY CONSERVATION CORROSION NON‐DESTRUCTIVE ANALYSIS NEUTRON DIFFRACTION RESIDUAL STRESS STRAIN MEASUREMENT |
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