From The Guardian: 1,000 years on, perils of fake Viking swords are revealed.
It must have been an appalling moment when a Viking realised he had paid two cows for a fake designer sword; a clash of blade on blade in battle would have led to his sword, still sharp enough to slice through bone, shattering like glass.
"You really didn’t want to have that happen," said Dr Alan Williams, an archaeometallurgist and consultant to the Wallace Collection, the London museum which has one of the best assemblies of ancient weapons in the world. He and Tony Fry, a senior researcher at the National Physical Laboratory in Teddington, south-west London, have solved a riddle that the Viking swordsmiths may have sensed but didn’t quite understand.[continue].