期刊論文
| 學年 | 114 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2025-11-01 |
| 作品名稱 | Achieving high-strength joining with superior metallurgical bonding in tungsten/steel via in-situ element-selective directional diffusion |
| 作品名稱（其他語言） | |
| 著者 | Huaqi Xu; Wenjing Zhang; Xiaonan Qi; Wanjing Wang; Ji-Chao Wang; Ye Jiao; Kailun Li; Shubo Zhang; Mingshen Li; Yuping Xu; Haishan Zhou; Ming-Hsien Lee; Wei Liu; Guangnan Luo |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Journal of Materials Processing Technology 345, 119064 |
| 摘要 | To address the weak metallurgical bonding at interfaces in traditional tungsten (W)/steel joints with copper (Cu) interlayers, this study proposes a strategy of in-situ element-selective directional diffusion, achieving high-strength metallurgical transition bonding at both W/Cu and Cu/steel interfaces. Specifically, by introducing a Cu-Ge interlayer at the W/steel interface, multi-physics-driven forces (gravity and temperature fields) were utilized to enable the selective directional diffusion of Fe and Cr from the steel across the Cu-based interlayer. These elements migrated through the Cu interlayer, forming an Fe-rich deposition layer at the W/Cu interface, realizing a metallurgically bonded W/Fe/Cu transition. Furthermore, compared to the brittle Fe₂W phase typically formed at conventional W/Fe interfaces, this study achieved in-situ toughening of the Fe₂W phase through lattice distortion and stacking faults engineering. Simultaneously, the entire distribution of Cu along steel grain boundaries formed a discontinuous reticulate Cu/steel heterostructure, effectively addressing the low bonding strength of conventional Cu/steel interfaces. Ultimately, an unprecedented shear strength of 380 MPa was attained. This work elucidates the mechanisms of interfacial metallurgical bonding, strengthening, and in-situ modification of brittle phases in dissimilar metal joints with significant thermophysical property differences. It provides a novel pathway for high-strength metallurgical joining of dissimilar metals in harsh service environments and offers new insights into the modification and toughening of brittle phases at welded interfaces. |
| 關鍵字 | Tungsten; RFAM steel; Joint; Metallurgical bonding; Brittle phase modification; Interfacial elemental diffusion; Reticulate heterostructure |
| 語言 | en |
| ISSN | 0924-0136 |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | NLD |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/129540 ) |