Abstract
The development of discontinuous reinforced titanium matrix composites (DRTMCs) provides a new idea to further improving the comprehensive mechanical properties of titanium alloys, which is expected to further expand their application fields to meet the new requirements of modern industry for metallic materials. In this study, the effects of Fe content on the microstructure and mechanical properties of Ti-TiBw-xFe composites were studied by adding alloying element Fe to Ti-TiBw composite powders. It was found that the grain size of α-Ti matrix was significantly refined with increasing Fe content. When Fe content was increased from 3.0 to 6.0 wt.%, the grain size of α-Ti decreased from 3.50 to 2.58 μm, representing a 26% decrease. Furthermore, the tensile strength of Ti-TiBw-6.0Fe reached 1065 MPa, which is 105.2% remarkable higher than that of Ti-TiBw with the same conditions, with an elongation at 5.3%. It was shown that the addition of Fe significantly improves the mechanical properties of Ti-TiBw-xFe composites. Solution strengthening, fine grain strengthening and load-bearing strengthening play a major role in improving the mechanical properties of Ti-TiBw-xFe composites.
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Acknowledgements
This work was supported by the financial of the National Key R&D Program of China (Grant No. 2021YFB3701203), National Natural Science Foundation of China (Grant No. 52201165), Shaanxi Innovative Research Team for Key Science and Technology (Grant No. 2023-CX-TD-46), Master's Seed Fund of Xi'an University of Technology (Grant No. 310-252082201), Doctoral Teacher Starting Fund of Xi'an University of Technology (Grant No. 101-45112107).
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SW: Conceptualization, Investigation and Writing—Original Draft. SL: Methodology, and Project administration. LL: Supervision. SL, LG and HL: Validation. XZ and BL: Formal analysis. BC, JU and KK: Resources. SZ: Data Curation.
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Wang, S., Li, S., Liu, L. et al. Microstructure and mechanical properties of powder metallurgy Ti-TiBw-xFe titanium matrix composites using Ti-TiBw composite powder. J Mater Sci 58, 13662–13677 (2023). https://doi.org/10.1007/s10853-023-08870-0
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DOI: https://doi.org/10.1007/s10853-023-08870-0