研究目的
Investigating phase transformations induced by thermal treatments in a Ti–6Al–4V alloy produced by laser powder bed fusion (LPBF) for biomedical applications.
研究成果
The study successfully used ND to detect retained β-Ti in α’-Ti martensite, a finding not achievable with XRD or STEM alone. Thermal treatments induced element diffusion and partitioning, leading to lattice expansion and phase transformations. The retained β-Ti phase significantly influences the α’ → β transformation kinetics, highlighting its importance in understanding and controlling the microstructure of LPBF-produced Ti–6Al–4V alloys for biomedical applications.
研究不足
The study focuses on the Ti–6Al–4V alloy produced by LPBF and its phase transformations under specific thermal treatments, which may not be directly applicable to other materials or manufacturing processes.
1：Experimental Design and Method Selection:
The study employed neutron diffraction (ND), X-ray diffraction (XRD), scanning transmission electron microscopy (STEM), and energy-dispersive spectroscopy (EDS) to investigate phase transformations.
2：Sample Selection and Data Sources:
Samples were produced using LPBF technology from EOS Ti64 powder, followed by thermal treatments to simulate dental application conditions.
3：List of Experimental Equipment and Materials:
EOSINT M290 system for LPBF, Bruker D8 Advance X-ray diffractometer, FEI Titan3 G2 60-300 for STEM, and ZEISS NEON CrossBeam 40EsB Focused Ion Beam (FIB) system for sample preparation.
4：Experimental Procedures and Operational Workflow:
Samples underwent a five-step thermal treatment in vacuum, followed by structural characterization using ND, XRD, STEM, and EDS.
5：Data Analysis Methods:
Rietveld refinement was used for XRD and ND patterns analysis, and Origin software for peak analysis.
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