| Autor: |
Yong Han, Yuan Li, Lei Ye, Zhiyuan Du, Zhanggen Liu, Xin Li, Ming-Chun Zhao, Andrej Atrens |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Materials & Design, Vol 220, Iss , Pp 110841- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
0264-1275 |
| DOI: |
10.1016/j.matdes.2022.110841 |
| Popis: |
W-Ni-Fe alloys with a low W content are a kind of promising tungsten alloys. However, limited results are available, and the responsible mechanism is not known for their dissolution-precipitation behavior, because long-range migration under the low W concentration is difficult after tungsten dissolution. In this work, a tungsten alloy with a low W content was prepared by liquid phase sintering. A new in-situ dissolution-precipitation process for tungsten alloys with a low W content was identified, which is different from that for tungsten alloys with a high W content. The interface between ultrafine precipitated W grains and the γ(FeNi3, W) phase in tungsten alloys with a low W content was a semi-coherent interphase boundary. Ni atoms and Fe atoms in the γ phase lattice were continuously replaced by W atoms during precipitation. W atoms continued to mass transfer to the interface area, and W grains formed when the enrichment was sufficient. The obtained 50W-25Ni-25Fe tungsten alloy had the superior combination of ultimate tensile strength (UTS) and elongation. The precipitation of ultrafine W grain strengthened the alloy. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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