Influence of element distribution on mechanical properties in the bonding zone of explosively welded steels

A melt pocket in the bonding zone of medium carbon steel bonded on low-carbon steel by explosive welding was investigated by laser assisted atom probe tomography. It was found that the structure is nanocrystalline and (sub-) grain boundaries are enriched with carbon. High hardness values in the melt pocket are attributed to a combination of (sub-) grain size and carbon distribution. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Automated summary

The investigation of a melt pocket in the bonding zone of medium carbon steel bonded on low-carbon steel by explosive welding using laser assisted atom probe tomography revealed a nanocrystalline structure with carbon-enriched (sub-) grain boundaries. The high hardness values in the melt pocket are attributed to a combination of (sub-) grain size and carbon distribution.