http://www.cnr.it/ontology/cnr/individuo/prodotto/ID277575

Investigations on a brass armour: Authentic or forgery? (Articolo in rivista)

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Investigations on a brass armour: Authentic or forgery? (Articolo in rivista) (literal)

Anno

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Alternative label

C. Martini (a); C. Chiavari (b); F. Ospitali (c); F. Grazzi (d); A. Scherillo (d,e); C. Soffritti (f,g); G.L. Garagnani (g) (2013)
Investigations on a brass armour: Authentic or forgery?
in Materials chemistry and physics (Print)
(literal)

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C. Martini (a); C. Chiavari (b); F. Ospitali (c); F. Grazzi (d); A. Scherillo (d,e); C. Soffritti (f,g); G.L. Garagnani (g) (literal)

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Note

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(a) Department of Industrial Engineering (DIN), University of Bologna, Via Risorgimento 4, 40136 Bologna, Italy (b) C.I.R.I. M.A.M (Advanced Applications in Mechanical Engineering and Materials Technology Interdepartmental Centre for Industrial Research), University of Bologna, Via Risorgimento 2, 40136 Bologna, Italy (c) Department of Industrial Chemistry \"Toso Montanari\", University of Bologna, Viale Risorgimento 4, 40136 Bologna, Italy (d) Consiglio Nazionale delle Ricerche, Istituto dei Sistemi Complessi, Via Madonna del Piano 10, 50019 Sesto Fiorentino, FI, Italy (e) Science and Technology Facility Council, ISIS Neutron Source, OX0QJ Didcot, United Kingdom (f) TekneHub, Department of Architecture, University of Ferrara, Via Quartieri 8, 44122 Ferrara, Italy (g) Department of Engineering, University of Ferrara, Via Saragat 1, 44122 Ferrara, Italy (literal)

Titolo

Abstract

A copper-based armour, supposedly excavated in Eastern Georgia and tentatively dated to the I-II century AD, was investigated with the aim of checking its authenticity. The finding consisted of several pieces, mostly in a good state of conservation: helmet, lorica musculata (i.e. muscled cuirass), forearm guards, pterygies (covering the lower body and thighs), shin greaves and a spear tip. The combination of conventional metallography with in situ and non-destructive investigations (including Time of Flight Neutron Diffraction (ToF-ND)) on the front of the lorica, on one of the pterygies and on the spear tip showed that the composition and microstructure of the armour was not fully homogeneous. However, the results from the muscled cuirass are fairly coherent and raise suspicion about the authenticity of the piece, namely because of the (i) presence of metallic Al in the alloy, in solid solution with Cu, (ii) prevalence of an as-cast microstructure, which lead to a heavy weight as well to the need for a high amount of metal by comparison to hammered sheet and (iii) presence of an artificial patina, combined with earthy deposits which are not explainable if the original patina was removed before artificial patination for aesthetical reasons. (literal)

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