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This study explores a new microdestructive on-site metallographic inspection technique for analyzing metal artifacts. In the current archeometrical work, the metallographic analysis of metal artifacts requires mechanical sampling, which not only damages the integrity of the artifacts but also brings cold working effects to the metallographic structure during the sampling process, making the information inaccurate. This study designed a set of detailed on-site metallographic inspection methods for bronze artifacts, including grinding, sealing, polishing, etching, replicating, cleaning, and other steps. After verifying its safety through simulation experiments, the method was applied to several precious bronze artifacts, including two Ming Dynasty bronze lions from the Xi’an Beilin Museum and a Shang Bronze Tripod Vessel with Cicada Designs from the China Bronze Ware Museum. The metallographic findings show that the in situ metallographic technique can flexibly and accurately reveal the metallographic texture and process information of each localized part of the bronze artifacts, e.g., the heat-affected zone of the coins on the surface of the Ming Dynasty bronze lions proved the casting-inlay process, and the different heat texture of each foot of the Shang Bronze Tripod Vessel with Cicada Designs proved the chronological sequence of its two historical restorations. This study provides a novel approach to the process analysis of bronze artifacts, a method that can provide significant advantages in analyzing the processing techniques of precious and intact artifacts.
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