研究目的
Investigating the processing, mechanical property and biocompatibility of Ti-30Nb-5Ta-3Zr manufactured by Selective Laser Melting (SLM).
研究成果
The study concludes that SLM is capable of producing low-E advanced TNTZ alloy with excellent biocompatibility and minimum stress shielding tendency. The as-printed TNTZ shows no cell cytotoxicity and better biocompatibility than Ti-6Al-4V, with mechanical properties that can be tailored to suit human bone properties by designing the amount of porosity with appropriate processing parameters.
研究不足
The study notes that defects including voids were considered as parts to decrease the fatigue limit, suggesting that Hot Isostatic Pressing (HIP) could further increase the relative density, fatigue limit, and yield strength of as-printed TNTZ alloy.
1：Experimental Design and Method Selection:
The study involved tuning processing parameters for SLM to manufacture TNTZ samples with varying point distances and laser exposure times to achieve optimal density and mechanical properties.
2：Sample Selection and Data Sources:
TNTZ powders produced by Plasma Rotating Electrode Process (PREP) were used.
3：List of Experimental Equipment and Materials:
A RENISHAW 250 HL machine equipped with a 200 W Yb: YAG pulsed fiber laser was used for SLM.
4：Experimental Procedures and Operational Workflow:
Samples were manufactured under a high-purity Ar atmosphere, with dimensions of 10×10×30 mm
5：The relative density, Vickers hardness, microstructure, elastic properties, and fatigue properties were investigated. Data Analysis Methods:
The relative density was measured by the Archimedes’ method, Vickers hardness was measured with a microscopic Webster hardness Tester, and microstructure was analyzed by SEM and XRD.
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