Author Identifier (ORCID)
Lai Chang Zhang: https://orcid.org/0000-0003-0661-2051
Abstract
The processing parameters of laser melting deposition (LMD) can significantly influence the microstructure and properties of LMD components. Herein, we manufactured TiBw/Ti–6Al–4V titanium matrix composite (TMC) using LMD, aiming to obtain the optimal preparation parameters. The electrical resistivity of the TMC first decreased and then increased, which was related to the microstructural evolution. TiBw network was formed in the matrix during LMD, indicating the in situ reaction of TiB2 during LMD. The reinforcement TiBw was tended to precipitate preferentially during solidification. In situ tensile experiments indicated that LMD TiBw/Ti–6Al–4V exhibited an ultimate strength of 1314 MPa and a plastic strain of 1.0% at room temperature, while the ultimate strength of 784 MPa and the plastic strain of 1.4% at 600℃. This is attributed to the different underlying deformation mechanisms at room temperature and high temperature. At room temperature, TiBw was first fractured brittlely under deformation, and the cracks propagated to the matrix. By contrast, the high temperature tension caused TiBw failure due to the interfacial stress concentration. Our findings provided valuable insights into adopting appropriate parameters for LMD high-performance TMCs.
Document Type
Journal Article
Date of Publication
1-1-2025
Publication Title
Virtual and Physical Prototyping
Publisher
Taylor & Francis
School
Centre for Advanced Materials and Manufacturing / School of Engineering
Funders
National Natural Science Foundation of China (92266102) / National Key R&D Program of China (2024YFB4609700 / National Natural Science Foundation of China (52271135, 52433016, 52571177) / Open Project of Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (GFST2024KF05) / Innovative Research Group Project of Hubei Provincial Natural Science Foundation (2025AFA014)
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial 4.0 License
Comments
Wu, Y., Guo, A., Yuan, J., Zhang, L., Wen, Y., Hua, L., Zhang, L., & Xie, L. (2025). Exploration on mechanical response mechanism of laser melting deposited TiB W /Ti–6Al–4V via in situ characterisation technology. Virtual and Physical Prototyping. Advance online publication. https://doi.org/10.1080/17452759.2025.2554854