The metallurgy, development, and purpose of pattern welding
Abstract
Surface patterns resulting from welding together iron and/or steel pieces were probably recognised soon after bloomery smelting began, long before the technique was exploited for its decorative potential in the mid to late Iron Age. People have speculated on when, why and how the technique was developed, long before the term was formally adopted in 1948 to differentiate weld patterns from those that originate from the casting of steel. Before much metallographic research was done on relevant material, pattern-welding was generally assumed to have been an ancient technique that was used to improve the physical properties of the objects – only swords before about the 7th century AD – for which it was used. However research, particularly over the past 40 years, has increasingly shown that pattern-welding was primarily a decorative technique designed to demonstrate excellence in the exploitation and welding together of different iron alloys this being judged by their appearance.
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