研究目的
Investigating the preparation of Ti6Al4V spherical powders by supreme-speed plasma rotating electrode process and their application in selective laser melting for additive manufacturing.
研究成果
The SS-PREP Ti6Al4V powders exhibited log-normal particle size distribution, with the average diameter predictable by the developed model. The SLM samples showed high yield strength and good ductility, with isotropic mechanical properties due to homogeneous microstructures.
研究不足
The major limitation of PREP is the difficulty in preparing fine powders (< 75 μm) with sufficient yield due to unsuitable rotating speeds. The study suggests increasing rotating speed for PREP upgrade.
1：Experimental Design and Method Selection:
The study involved preparing Ti6Al4V spherical powders using the supreme-speed plasma rotating electrode process (SS-PREP) and analyzing their particle size distribution and mechanical properties after selective laser melting (SLM).
2：Sample Selection and Data Sources:
Ti6Al4V rotating electrodes were machined for SS-PREP, and powders were collected under Ar atmosphere to avoid oxidation.
3：List of Experimental Equipment and Materials:
Equipment included a 75 kW plasma torch, Malvern MASTERSIZER 2000 laser particle size analyzer, and EOS M290 for SLM.
4：Experimental Procedures and Operational Workflow:
Powders were prepared under different rotating speeds, characterized for size distribution, and used in SLM to produce samples for mechanical testing.
5：Data Analysis Methods:
Particle size distribution was analyzed using a log-normal fitting model, and mechanical properties were evaluated through tensile testing.
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