Abstract
A metallurgical and technological characterization of a seventh century seax coming from the Lombard necropolis of Campo San Giovanni in Leno (Brescia, northern Italy) was carried out to investigate the smithing technology involved in the blade manufacturing process. At first, a metric-based typological investigation of the seax was performed. X-ray radiography was used to gain a preliminary non-destructive technological assessment of the object. Optical microscopy and Vickers hardness measurements have allowed a metallurgical and mechanical characterization of the metal matrix both at the upper and lower blade portion. The results show that the seax blade was forged using different steel bars and also hypereutectoid steel. In addition, a selective quenching was performed by the ancient blacksmith to enhance the cutting-edge hardness. Scanning electron microscopy coupled with X-ray dispersive spectroscopy was employed to determine the chemistry of a large sample of nonmetallic inclusions entrapped within the metal matrix. A multivariate statistical analysis of the inclusions compositional data was used to carefully examine the composite nature of the artefact and trace the origin of the seax steel.
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References
Breda, A.: Leno (Bs). Località Campi S. Giovanni. Necropoli e insediamento altomedievali, pp. 82–83. Soprintendenza Archeologica della Lombardia, in Italian (1992-1993)
Giostra, C.: La fisionomia culturale dei Longobardi in Italia settentrionale: la necropoli di Leno, Campo Marchione (Brescia). In: Ebanista, C., Rotili, M. (eds.) Archeologia e storia delle migrazioni: Europa, Italia, Mediterraneo fra tarda età romana e altomedioevo, pp. 255–274. Tavolario, In Italian (2011)
De Marchi, P.M., Breda, A.: Il territorio bresciano in età longobarda e la necropoli di Leno. In: Bertelli, C., Brogiolo, G.P. (eds.) Il futuro dei Longobardi. L’Italia e la costruzione dell’Europa di Carlo Magno. Catalogo della Mostra, pp. 472-492. Skira, Milano, in Italian (2000)
Salin, E.: La civilisation mérovingienne d’après les sépultures, les textes et le laboratoire. Troisième partie: Les techniques, pp. 45-57. Picard, Paris, in French (1957)
Böhner, K.: Die fränkischen Aitertümer des Trierer Landes (2 Bde.). Mann, Berlin, in German (1958)
Martin, M.: Mit Sax und Gürtel ausgestattete Männ-ergräber des 6. Jahrhunderts in der Nekropole von Kranj (Slowenien). In: Bratož, R. (ed.) Slovenija in sosednje dežele med antiko in karolinško dobo. Začetki slovenske etnogeneze (Slowenien und die Nachbarländer zwischen Antike und karolingischer Epoche, pp. 141-198. Anfänge der slowenischen Ethnogenese, Ljubljana, in German (2000)
Martin, M.: Observations sur l’armement de l’époque mérovingienne précoce. In: Vallet, F., Kazanski, M. (eds.) L’Armée Romaine et les Barbares du IIIe au VIIe Siècle, Mémoires de l’Association Française d’Archéologie Mérovingienne, pp. 395-409. Association Française d’Archéologie Mérovingienne, Paris, in French (1993)
Giostra, C.: Analisi dei corredi e delle offerte. La tomba inviolata del giovane armato. La tomba della fanciulla e le altre sepolture. Le croci in lamina d’oro. I vaghi di collana. I pettini. In: Lusuardi Siena, M.S., Giostra, C. (eds.) Archeologia medievale a Trezzo sull’Adda. Il sepolcreto longobardo e l’oratorio di San Martino. Le chiese di S. Stefano e San Michele in Sallianense, pp. 218-288. Vita e Pensiero, Milano, in Italian (2012)
G. Cornacchia, A. Breda, A. Pacini, R. Roberti, M. Faccoli, Metallurgical and technological investigation with experimental archaeometallurgical reproduction of a lombard bronze buckle from North Italy. Int. J. Met. 15(3), 806–817 (2021)
De Marchi, P.M., Possenti, E.: Rocca di Monselice (PD). Le sepolture longobarde. In: Brogiolo, G.P., Cantino Wataghin, G. (eds.) Sepolture tra IV e VIII secolo, 7° Seminario sul Tardoantico e l’Altomedioevo in Italia centro settentrionale, pp. 197–228. SAP Società Archeologica S.r.l., Mantova, in Italian (1998)
V. La Salvia, Iron Making during the Migration Period: the case of the Lombards (British Archaeological Reports International Series, Oxford, 2007), p. 36
J. Hošek, P. Bárta, J. Šmerda, Metallographic examination and reconstruction of the 6th century lombardic sword from Kyjov. Mater. Manuf. Process. 32(7–8), 885–899 (2017)
Rotili, M.: Necropoli di Borgovercelli. In: Gavazzoli, M.L.T. (ed.) Museo novarese. Documenti, studi, progetti per una nuova immagine delle collezioni civiche, pp. 123-141. De Agostini, Novara, in Italian (1987)
Rotili, M.: La necropoli longobarda di Benevento, pp. 43-51. Università di Napoli, Napoli, in Italian (1977)
La Salvia, V.: Archaeometallurgy of Lombard swords. From artifacts to a history of craftsmanship, p. 10. All’insegna del Giglio, Firenze, in Italian (1998)
A. Aronson, D. Ashkenazi, O. Barkai, Y. Kahanov, Archaeometallurgical investigation of the iron anchor from the Tantura F shipwreck. Mater. Charact. 78, 108–120 (2013)
D. Ashkenazi, D. Cvikel, A. Stern, A. Pasternak, O. Barkai, A. Aronson, Y. Kahanov, Archaeometallurgical investigation of joining processes of metal objects from shipwrecks: three test cases. Metallogr. Microstruct. Anal. 3, 349–362 (2014)
Pleiner, R.: Iron in Archaeology: The European Bloomery Smelters. Archaeologicky Uśtav Avĕr, Praha (2000)
Williams, A.: The sword and the crucible: a history of the metallurgy of European swords up to the 16th century, p.12. Brill, Leider-Boston (2012)
Rupp, C.: "Catalogo". In: Paroli, L. (ed.) Umbria Longobarda, pp. 89-130. Edizioni De Luca, Rome, in Italian (1997)
Á. Thiele, J. Hošek, P. Kucypera, L. Dévényi, The role of pattern-welding in historical swords—mechanical testing of materials used in the manufacture of swords. Archaeometry. 57(4), 720–739 (2016)
Waldner, T. K.: Typologische Und Technologische Untersuchungen Der Saxe Aus Überackern, Oberösterreich. Archaeologia Austriaca 103, 137-160, in German (2019)
Szameit, E., Mehofer, M.: Technologische Untersuchungen an Waffen des Frühmittelalters aus Oberösterreich. Jahrb. Oberösterr. Musealver. Ges. Landeskde 147(1), 127–168, in German (2002)
Pleiner, R.: Iron in Archaeology: Early european blacksmiths. Archaeologicky Uśtav Avĕr, Praha (2006)
I. Voiculescu, V. Geantă, A. Stern, D. Ashkenazi, M. Cohen, D. Cvikel, Iron-bound deadeyes from the nineteenth-century Akko Tower Wreck, Israel: metallurgical investigation of the manufacturing technology. Metallogr. Microstruct. Anal. 6(2), 106–125 (2017)
V.F. Buchwald, H. Wivel, Slag analysis as a method for the characterization and provenancing of ancient iron objects. Mater. Charact. 40(2), 73–96 (1998)
P. Dillmann, M. L’Héritier, Slag inclusion analyses for studying ferrous alloys employed in French medieval buildings: supply of materials and diffusion of smelting processes. J. Archaeol. Sci. 34, 1810–1823 (2007)
E. Blakelock, M. Martino-Torres, H. Veldhuijzen, T. Young, Slag inclusions in iron objects and the quest for provenance: an experiment and a case study. J. Archaeol. Sci. 36, 1745–1757 (2009)
G. Pagès, P. Dillmann, P. Fluzin, L. Long, A study of the roman iron bars of Saintes-Maries-de-la-Mer (Bouches-du-Rhône, France). A proposal for a comprehensive metallographic approach. J. Archaeol. Sci. 38, 1234–1252 (2011)
A. Disser, P. Dillmann, M. Leroy, P. Merluzzo, S. Leroy, The bridge of Dieulouard (Meurthe-et-Moselle, France): a fresh perspective on metal supply strategies in Carolingian economy. ArchéoSciences. 40, 149–161 (2016)
Dillmann, P., Aranda, R., L’Heritier, M., Fluzin, P.: Forging of iron-steel artifacts: archaeology, experiments and archaeometry. In: 1st International Conference of Paleosiderurgy and Industrial Heritage Recovery. Inasmet, San Sebastian (2005)
Citter, C.: I corredi nella Tuscia longobarda: produzione locale, dono o commercio? Nota per una storia delle attività produttive nella Toscana altomedievale. In: Brogiolo, G.P. (ed.) Sepolture tra VI e VIII secolo, pp. 179-195. Società Archeologica Padana, Mantova, in Italian (1996)
M.F. Charlton, P. Crew, T. Rerhen, S. Shennan, J. Humpris, T. Rehren, Measuring variation in iron smelting slags: an empirical evaluation of group identification procedures, in The World of Iron. ed. by J. Humphris (Archetype Publications Ltd, London, 2013), pp. 421–430
M.F. Charlton, E. Blakelock, M. Martinón-Torres, T. Young, Investigating the production provenance of iron artifacts with multivariate methods. J. Archaeol. Sci. 39(7), 2280–2293 (2012)
R Core Team: R: A Language and Environment for Statistical Computing. https://www.r-project.org/ (2020). Accessed 20 August 2021
W.N. Venables, B.D. Ripley, Modern Applied Statistics with S, 4th edn (Springer, New York, 2002)
J. Wernard, “Hic scramasaxi loquuntur”. Typologisch-chronologische Studie zum einschneidigen Schwert der Merowingerzeit in Süddeutschland. Germania. 76, 747–787 (1998)
Csiky, G.: Edged Weapons. In: Csiky, G. (ed.) Avar-Age Polearms and Edged Weapons, pp. 152–291. Brill, Leiden-Boston (2015)
P. Crew, The experimental production of prehistoric bar iron. Hist. Metall. 25, 21–36 (1991)
P. Crew, C. Salter, C. Salter, Currency bars with welded tips. Bloom. Ironmak. Dur. 3, 11 (2000)
P. Crew, P. Salter, Currency bars with welded tips, in Bloomery ironmaking during 2000 years. ed. by A. Espelund (University of Trondheim, Trondheim, 1993), pp. 11–30
A. Williams, A metallurgical study of some Viking swords. Gladius. 29, 121–184 (2009)
T. Oyama, O.D. Sherby, J. Wadsworth, B. Walser, Application of the divorced eutectoid transformation to the development of fine-grained, spheroidized structures in ultrahigh carbon steels. Scr. Metall. 18, 799–804 (1984)
L.E. Samuels, Spheroidization and Graphitization, in Light Microscopy of Carbon Steels. ed. by L.E. Samuels (ASM International, Materials Park (OH), 1999), pp. 165–183
A.C. Rencher, Principal Component Analysis, in Methods of Multivariate Analysis. ed. by A.C. Rencher (John Wiley & Sons, New York, 2003), pp. 380–407
A. Disser, P. Dillmann, C. Bourgain, M. L’Heritier, E. Vega, S. Bauvais, M. Leroy, Iron reinforcements in Beauvais and Metz Cathedrals: from bloomery or finery? The use of logistic regression for differentiating smelting processes. J. Archaeol. Sci. 42, 315–333 (2014)
T. Birch, M. Martinòn-Torres, The iron bars from the ‘Gresham Ship’: employing multivariate statistics to further slag inclusion analysis of ferrous objects. Hist. Metall. 48, 69–78 (2015)
V.F. Buchwald, Iron and Steel in Ancient Times (Historisk-filosofiske Skrifter, Copenhagen, 2005)
M.F. Charlton, The last frontier in ”sourcing”: the hopes, constraints and future for iron provenance research. J. Archaeol. Sci. 56, 210–220 (2015)
M.J. Baxter, A review of supervised and unsupervised pattern recognition in archaeometry. Archaeometry. 48(4), 671–694 (2006)
Cucini Tizzoni, C., Tizzoni, M.: Ponte di Val Gabbia I e II: i bassofuochi di Età Longobarda. In: Cucini Tizzoni, C., Tizzoni, M. (eds.) La miniera perduta. Cinque anni di ricerche archeometallurgiche nel terriorio di Bienno, pp. 141–182. Tipografia Camuna S.p.A, Breno, in Italian (1999)
Cucini Tizzoni, C., Tizzoni, M. Ponte di Val Gabbia III: la forgia e i bassofuochi fra Tardoantico e alto Medioevo. In: Cucini Tizzoni, C., Tizzoni, M. (eds.) La miniera perduta. Cinque anni di ricerche archeometallurgiche nel terriorio di Bienno, pp. 93–117. Tipografia Camuna S.p.A, Breno, in Italian (1999)
M.J. Baxter, C.C. Beardah, R.V.S. Wright, Some archaeological applications of kernel density estimates. J. Archaeol. Sci. 24(4), 347–354 (1997)
Fluzin, P.: Iron in the Alps: Deposits, Mines and Metallurgy from Antiquity to the XVI Century, pp. 24–31. Tipografia Camuna S.p.A., Breno (2000)Century, in: Iron Alps Depos. Mines Metall. from Antiq. to XVI Century, 2000: pp. 24–31
G. Cornacchia, M. Faccoli, R. Roberti, Metallurgical investigation of a steel miner’s chisel from Ponte Val Gabbia III site. JOM. 67, 260–271 (2015)
Acknowledgements
The authors are grateful to Enrico Ghignatti and Gabriele Tonelli of STL for their support, Bosello High Technology for RX analysis, Fondazione Dominato Leonense, Prof. Vasco La Salvia and Dr. Paola Marina De Marchi, Former Director of the Archaeological area of Castelseprio (Arsago Seprio, Italy), for the archaeological information.
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Merico, P., Faccoli, M., Ferrari, V. et al. Metallurgical and Technological Characterization of a Lombard Seax from North Italy. Metallogr. Microstruct. Anal. 10, 736–753 (2021). https://doi.org/10.1007/s13632-021-00799-7
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DOI: https://doi.org/10.1007/s13632-021-00799-7