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Strength–ductility trade-off in TiB-TC4 composites with a pseudo core–shell structure
- Source :
- Journal of Materials Research and Technology, Vol 27, Iss , Pp 574-584 (2023)
- Publication Year :
- 2023
- Publisher :
- Elsevier, 2023.
-
Abstract
- Heterogeneous structure is practical to improve the strain hardening abilities of materials due to the effect of hetero-deformation induced hardening, especially of composites. In this study, a series of TiB/TC4 composites with a pseudo core–shell structure of bimodal grain distribution were fabricated via a two-step ball-milling and spark plasma sintering. The synthesized TiB/TC4 composites have a structure of coarse lamella α-Ti grains of average 23.6 μm in diameter surrounded by fine α-Ti lamella grains of average 4.2 μm, with TiB distributed on the primary TC4 surface areas. TiB/TC4 composites with 0.4 wt% TiB2 exhibited the best comprehensive mechanical properties with an ultimate tensile strength of 1161.95 MPa (a 35.1% increase compared with that of pure TC4) and an elongation of 7.57%. In conclusion, the pseudo core–shell structure improved the strength by improving the strain-hardening abilities, achieved by the coordinated deformation between coarse grains and fine grains.
Details
- Language :
- English
- ISSN :
- 22387854
- Volume :
- 27
- Issue :
- 574-584
- Database :
- Directory of Open Access Journals
- Journal :
- Journal of Materials Research and Technology
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.baff216ba9654923b37971e46fd99867
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.jmrt.2023.09.234