http://scholars.ntou.edu.tw/handle/123456789/26679| Title: | Advanced microstructural analysis of CuCrZr and 304 stainless steel dissimilar welds via transmission electron microscopy | Authors: | Chang, Chin-Chun Chan, Che-Kai Chen, Bo-Ying Chuang, Ping-Shun Lee, Hung-Bin |
Keywords: | CuCrZr-SS welding;intermetallic compounds;elemental diffusion;sulfur segregation;dislocation networks;grain boundary embrittlement | Issue Date: | 2026 | Publisher: | SAGE PUBLICATIONS INC | Source: | MATERIALS SCIENCE AND TECHNOLOGY | Abstract: | This study characterizes CuCrZr/304 stainless steel dissimilar welds using HR-TEM and EDS. A 1.5-2.0 mu m interfacial diffusion layer was identified, driven primarily by Cu migration. Analysis confirmed the formation of brittle Fe-Cu intermetallic compounds (FeCu3, Fe2Cu5) and significant sulfur segregation (FeS, Cu2S), leading to grain boundary embrittlement and hot cracking. Furthermore, high-density dislocation networks and twin boundaries indicated strain-induced martensitic transformation in the heat-affected zone. Based on these nanoscale insights, employing diffusion barriers and post-weld heat treatment is proposed to mitigate defects and enhance joint stability. |
URI: | http://scholars.ntou.edu.tw/handle/123456789/26679 | ISSN: | 0267-0836 | DOI: | 10.1177/02670836261447621 |
| Appears in Collections: | 光電與材料科技學系 |
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