Search results for "métallurgie"

La métallurgie du fer au Sahel : Répartition spatiale de bas fourneaux au Sud-Ouest du Niger. Premiers résultats

2010

International audience; A 15 km à l'Est de Niamey (Sud-Ouest du Niger), une prospection pédestre exhaustive a permis de dénombrer plus de 4000 bas-fourneaux sur un bassin versant de 24 km². Ils sont identifiables par la présence de scories correspondant aux résidus de réduction du fer. Ce grand nombre de structures de réduction est lié au fonctionnement à usage unique des bas-fourneaux, qui est peu étudié dans la région ouest africaine. Les premières études de répartition spatiale montrent que l'implantation de ces bas-fourneaux est principalement soumise à la géomorphologie. Les forgerons ont installé leurs sites de réduction à proximité des talus de plateaux où affleure le minerai de fer …

The tools like evidences of metal working? : strike supports, abrasives and burnishers, sharpening tools and crushing tools

2013

Lots of lithic tools are present in Metal Ages, but few are studied. In metal production, they are especially constitued by strike supports, abrasives, burnishers, sharpening tools and crushing tools. A part of them are in metal ( strike supports) or in ceramic (abrasives, sharpening tools). Contemporary forms of these tools are too different to permit a dierct comparison. It is necessary to work on the function of the tools, deduced from the analysis of these structure. Strike supports used for metal working are easily identifiable. They allow to reproduce more or less precisely the objects that they were fabricated with. Abrasives are difficult to relate to a material, but the traces of u…

Were Bronze Age metalworkers skilled?: Perspectives from the study of the making of Bronze Age swords

2019

International audience; Beyond the provocation of the title, the question of ancient metalworkers’ skills, that has been recently discussed by Maikel Kuijpers for Bronze Age axes, makes perfect sense concerning Bronze Age swords, especially when equipped with a metallic hilt. These weapons are indeed almost always described as masterpieces of metalwork made by skilled and specialized craftsmen. This does not take into account the breakthroughs made since the 1960s in the study of the fabrication techniques of bronze artefacts. Even if it is true that most Bronze Age swords are looking flawless on the surface, imaging techniques such as X-ray or CT-scan enable archaeologists to have a glimps…

Moines et métallurgie dans la France médiévale

1991

International audience

Une production locale d’épées à poignée métallique dans l’est de la France à la fin de l’âge du Bronze ?

2018

International audience; Une première étude croisée des formes et des techniques de fabrication des épées à poignée métallique de la fin du Bronze final au niveau européen a permis de dégager l’hypothèse d’une possible fabrication indépendante de ce type d’arme dans l’est de la France. Cette proposition repose tout particulièrement sur l’étude de deux groupes typologiques contemporains : le type Mörigen et la variante Hostomice du type Tachlovice. Ce travail vise à illustrer le potentiel des études technologiques sur ces épées qui, en complément de la typologie, permettront d’obtenir de précieux renseignement sur les artisans métallurgistes ou encore sur les centres de production et les rése…

Production et circulation des épées à poignée métallique de l'âge du Bronze en Europe occidentale

2023

Influence of the metallurgy and the microstructure on the strength of titanium-steel laser welded assemblies

2021

The dissimilar laser welding of titanium alloys with stainless steel is of high interest for different industrial applications. However, the joining of these materials by direct fusion is hardly achievable because of the presence of brittle intermetallic phases in the Ti-Fe system that produce spontaneous cracking of the welds. The scientific aim of this thesis is to identify a reliable criterion that allows identifying the possible conditions allowing obtaining a durable dissimilar titanium/steel joints, in terms of mechanical strength in service conditions. The determination of this criterion is necessary for the comprehension of the relation between the microstructure of the melted zone …

Villiers-sur-Seine

2020

The known Bronze Age settlements between the Île-de-France and Champagne are usually small, unenclosed family farms. The Villiers-sur-Seine site, however, built in a visible and accessible location that enabled control of activities on the nearby river, is completely different: the two large buildings and their annexes were protected by a system of ditches and an ostentatious palisade. Though the Seine Valley was already anthropised at the end of the 9th century BC, this habitat seems to have had a significant impact on the nearby natural environment: development of agropastoral activities due to the extension of wet meadows, episodes of land clearing for construction, cultivation of variou…

Cinq millénaires de métallurgie en montagne basque. Les apports d'une démarche intégrée alliant palynologie et géochimie isotopique du plomb

2001

Five thousand years of metallurgy in the basque mountains : the contributions of an integrated process mixing palynology and the isotopic chemistry of lead. An interdisciplinary research combining palyno- logy and lead isotopic geochemistry was performed in a peat bog of the Basque Country, in an area recognized as being an old metallurgical centre. These various analyses make it possible to reconstitute mining and metallurgical activities and to appreciate the impact on forest during last five millennia. Several phases are attested between late Neolithic and modern times (Middle Bronze age, Late Bronze age, Antiquity and finally modern time). Most of these phases are clearly related to for…

Métallurgie du plomb et activités commerciales en façade de la Casa del Salone Nero à Herculanum (VI, 12; VI, 14 et VI, 15)

2006

Excavations in Herculaneum - Interim report - Campaign 2005