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Artifact ID DK 113/306
Class wire/rod
Material copper-base
Site Don Klang
Period Late Period

Provenience Status/Description Metallography Elemental/Hardness
Alloy: high-tin bronze
Where Cut: cross section of shaft
How Mounted: both pieces mounted lengthwise in same mount
Structure: Unclear.
Metallographic description: This is an unusual structure. According to the PIXE, it has 20% Sn (EDS, 23%). It appears to be multi-phase. The alpha consists of long tubes of twinned grains; the tubes line up approximately in the same direction. The dark second phase appears to be mixed with a third, lighter phase. Nonmetallic inclusions are frequent and have been flattened longitudinally, like the alpha. There are no martensitic needles or strain lines. Is this perhaps an unquenched high-tin alloy? The phases do not resemble alpha+delta eutectoid. It is largely free from corrosion.

Photomicrographs

DK 113/306<br>Total length of all pieces=1.1 cm. Cross section diameter=0.2 cm. Cross section unclear.

Photomicrographs Available

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