High Tech Scans of Viking swords reveal a slice of Norse culture

High Tech Scans of Viking swords reveal a slice of Norse culture

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High-tech scans of Viking swords are uncovering details of how the weapons were made and how their role changed in Viking society over time.

A new analysis of 3 Viking swords has found that, as fearsome as these seafaring people were, these specific “weapons” were probably not sturdy enough for fight or raiding, and instead were likely decorative.

This finding, along with similar examples of non-battling swords from the Viking Age, described previously by scientists, indicate that swords became symbols of power and status that was only rarely used, the researchers said. 

Amid the Viking Age, which ancient writings and archaeological discoveries suggested lasted from about A.D. 750 to 1050, seafaring crews from Scandinavia went “Viking” — that is, they began raiding.

They used various kinds of weapons depending on their social status, ranging from affordable axes, spears and lances to costly swords, usually owned only by the elite, analysts said.

More than 2k  swords from the Viking Age have survived to the present day, researchers of the new study said.

These swords were mostly examined either by eye or through invasive methods that required the extraction of samples.

Presently, scientists have for the first time used neutron scanning to peer deeply into Viking swords in a noninvasive way.

Neutron scans are similar to X-rays but use neutrons (subatomic particles in an atom’s nucleus) that, unlike X-rays, can penetrate the clouds of electrons encompassing each atom, enabling deeper scans. 

“This is the first study which allowed us to virtually ‘slice’ Viking swords, showing how extraordinary materials have been combined together,” said study lead author Anna Fedrigo, a materials researcher at the Technical University of Denmark.

Designing swords

The researchers examined three Viking Age swords from the National Museum of Denmark.

All three date to the 9th  or 10th century A.D. and come from Central Jutland in what is now Denmark.

All 3 swords were created using through pattern-welding, a technique in which thin strips of different kinds of iron and steel are welded together and then folded, twisted and forged in various ways to produce decorative patterns on the subsequent surfaces.

“This method is still appreciated — pattern-welded swords are currently produced for sword enthusiasts,” Fedrigo told Live Science.

The scientists discovered these swords were not well-designed for combat. “Because steel is harder than iron, we would expect to find, in a fighting tool, hard steel edges and an iron core to absorb blows,” Fedrigo said. “The swords analyzed do not show this preferential distribution.”

In addition, the scans uncovered the different strips of metal in these swords were forge-welded at high temperatures, making it more likely that materials known as oxides formed on the surface of these strips.

These oxides weaken the swords and can allow rust to creep in, Fedrigo noted.

Danish researchers have used neutron scanning to analyse Viking swords for the first time, to uncover new details of their construction. Three swords from the National Museum of Denmark were scanned to create virtual slices (pictured) through them
Danish researchers have used neutron scanning to analyse Viking swords for the first time, to uncover new details of their construction. Three swords from the National Museum of Denmark were scanned to create virtual slices (pictured) through them

 

Neutron scanning was used to analyse the chemical composition and method of their construction. The top images shows evidence of corrosion over time, while the bottom images analyse the carbon content of the swords
Neutron scanning was used to analyse the chemical composition and method of their construction. The top images shows evidence of corrosion over time, while the bottom images analyse the carbon content of the swords

 

A neutron scanner (pictured) was used to analyse the composition of the swords. A beam of neutrons is passed through a material and variations in its structure will affect the pattern of particles which emerges the other side
A neutron scanner (pictured) was used to analyse the composition of the swords. A beam of neutrons is passed through a material and variations in its structure will affect the pattern of particles which emerges the other side.

 

The three swords used for analysis (pictured). The top sword was found in Skanderborg, the middle sword in Randers and the bottom sword in Viborg
The three swords used for analysis (pictured). The top sword was found in Skanderborg, the middle sword in Randers and the bottom sword in Viborg
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