| Issue |
MATEC Web Conf.
Volume 401, 2024
21st International Conference on Manufacturing Research (ICMR2024)
|
|
|---|---|---|
| Article Number | 03011 | |
| Number of page(s) | 6 | |
| Section | Advanced Materials, Processes and Analysis | |
| DOI | https://doi.org/10.1051/matecconf/202440103011 | |
| Published online | 27 August 2024 | |
Study on the silicide phase control and room temperature mechanical properties of Nb-Si-Ti based alloys via B and Mg-microalloying
National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China
* Corresponding author: ruirunchen@hit.edu.cn
The Nb-16Si-20Ti-4Cr-1.5Al-4Hf-4Zr-1Ta-xB (x=0, 2, 4)-yMg (y=0, 0.2, 0.4) alloys were prepared by non-consumable arc melting. The effects of B and Mg addition on the microstructure and room temperature fracture toughness have been investigated. The results reveal that when the content of B element reached 4 at.%, the intermediate metastable phase Nb3Si was precipitated in Nb-Si based alloys. The cooperation of B and Mg synergistically enhances the room temperature fracture toughness of Nb-Si based alloy. B and Mg element causes the eutectic point of Nb-Si based alloy to shift to the right. The 2B-0.4Mg alloy shows the best fracture toughness, and its KQ value is 14.41 MPa·m 1/2, which increased by 34% compared to the matrix alloy. Crack deflection and secondary cracking increase the room-temperature fracture toughness of Nb-Si-based alloys.
© The Authors, published by EDP Sciences, 2024
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