Liu, Zhongyi, Han, Quanquan, Zhang, Zhenhua, Wang, Liqiao, Ma, Teng, Gao, Zhengjiang, Song, Bo, Liu, Hanlian, Huang, Chuanzhen and Setchi, Rossitza  ORCID: https://orcid.org/0000-0002-7207-6544
2023.
Design of a novel crack-free precipitation-strengthened nickel-based superalloy and composites for laser powder bed fusion.
Virtual and Physical Prototyping
18
(1)
, e2224769.
10.1080/17452759.2023.2224769
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Abstract
Avoiding cracking defects is crucial to ensuring processability in the laser powder bed fusion (LPBF) of metallic materials. In this study, a crack-free Ni-based superalloy with a high volume fraction of the γ′ phase was designed for the LPBF process using the thermodynamic approach. The results indicate that the designed SD01 Ni-based alloy was crack-free and over 21% of the spherical γ′ phase was uniformly distributed in the matrix after heat treatment. In addition, 1 wt.% TiB2 particles were introduced into the SD01 alloy to further enhance high-temperature mechanical performance. It was found that the morphology of the γ′ phase was altered from spherical to cubic structures, and its volume fraction increased from 21% to 40% after the TiB2 addition. The SD01-TiB2 composite exhibited an excellent combination of tensile strength (437.43 MPa) and elongation (7.71%) at 900 °C compared with the SD01 alloy (252.03 MPa, 3.02%). These findings provide a new metallic material design method for the LPBF of crack-free high-performance Ni-based materials.
| Item Type: | Article |
|---|---|
| Date Type: | Published Online |
| Status: | Published |
| Schools: | Schools > Engineering |
| Publisher: | Taylor and Francis Group |
| ISSN: | 1745-2759 |
| Date of First Compliant Deposit: | 12 July 2023 |
| Date of Acceptance: | 8 June 2023 |
| Last Modified: | 13 Jul 2023 19:40 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/160909 |
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