- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Low-modulus biomedical Ti–30Nb–5Ta–3Zr additively manufactured by Selective Laser Melting and its biocompatibility
摘要： Low Young’s modulus Titanium alloys, such as Ti-30Nb-5Ta-3Zr (TNTZ) of this study, were promising biocompatible implant materials. In this work, TNTZ samples with relative density of 96.8%-99.2% were additively manufactured by powder-bed based Selective Laser Melting (SLM) through tuning processing parameters, i.e. varying the point distance between 50 and 75 μm, laser exposure time between 135 and 200 μs, and a fixed laser power of 200 W. The microstructure, elastic properties, fatigue properties and machining accuracy of the fabricated samples have been investigated. Lattice structure TNTZ samples with porosity of 77.23% was also fabricated to further reduce the Young’s modulus of the TNTZ. According to the Relative Growth Rate (RGR) value, the as-printed TNTZ samples exhibit no cell cytotoxicity, where they show even better biocompatibility than the comparative, as-printed Ti-6Al-4V samples. The as-printed TNTZ developed by the study demonstrates good biocompatibility, low stress shielding tendency and high mechanical properties.
关键词： TNTZ,Biocompatibility,Mechanical properties,Selective Laser Melting,Microstructure
更新于2025-09-10 09:29:36
-
Performance Consistency of AlSi10Mg Alloy Manufactured by Simulating Multi Laser Beam Selective Laser Melting (SLM): Microstructures and Mechanical Properties
摘要： Multi-laser beam selective laser melting (SLM) technology based on a powder bed has been used to manufacture AlSi10Mg samples. The AlSi10Mg alloy was used as research material to systematically study the performance consistency of both the laser overlap areas and the isolated areas of the multi-laser beam SLM manufactured parts. The microstructures and mechanical properties of all isolated and overlap processing areas were compared under optimized process parameters. It was discovered that there is a raised platform at the junction of the overlap areas and the isolated areas of the multi-laser SLM samples. The roughness is significantly reduced after two scans. However, the surface roughness of the samples is highest after four scans. As the number of laser scans increases, the relative density of the overlap areas of the samples improves, and there is no significant change in hardness. The tensile properties of the tensile samples are poor when the overlap area width is 0, 0.1, or 0.2 mm. When the widths of the overlap areas are equal to or greater than 0.3 mm, there is no significant difference in the tensile strength between the overlap and the isolated areas.
关键词： selective laser melting,AlSi10Mg,microstructure,multi-laser manufacturing,mechanical property
更新于2025-09-09 09:28:46
-
Effects of inclination angle on surface roughness and corrosion properties of selective laser melted 316L stainless steel
摘要： Balling effect is an inevitable defect during Selective laser melting (SLM) process, and it deteriorates the mechanical and corrosion properties of the resulting parts. In this work, the SLM process is used with various inclination angles to fabricate samples. The deep relationship between the selective laser melting process and the corrosion properties of the as-SLM fabricated parts is established to understand the effect of the inclination angle on the surface roughness, microstructure evolution, and corrosion properties of 316L stainless steel components. Results show that the Ra value of fabricated parts increased with increasing inclination angles. Inclination angles play an important role in balling and defect formation. Fabricated parts exhibit a wide passive region in salty environments. The corrosion resistance of the SLM samples after polishing is decreased comparing to that of the unpolished which attribute to porosity and balling behavior. The typical corrosion characterization of polished surface is pitting and localized corrosion, and it mainly origin of pores and balling. Meanwhile, balling behavior accelerated corrosion rates of non-polished parts.
关键词： Selective laser melting,Inclination angles,Surface roughness,Corrosion resistant
更新于2025-09-09 09:28:46
-
Study of Size Effect on Microstructure and Mechanical Properties of AlSi10Mg Samples Made by Selective Laser Melting
摘要： The macroscopic mechanical performance of additive manufactured structures is essential for the design and application of multiscale microlattice structure. Performance is affected by microstructure and geometrical imperfection, which are strongly influenced by the size of the struts in selective laser melting (SLM) lattice structures. In this paper, the effect of size on microstructure, geometrical imperfection, and mechanical properties was systemically studied by conducting experimental tests. A series of AlSi10Mg rod-shaped samples with various diameters were fabricated using SLM. The uniaxial tensile test results show that with the decrease in build diameter, strength and Young’s modulus of strut decreased by 30% more than the stable state. The main reasons for this degradation were investigated through microscopic observation and micro X-ray computed tomography (μ-CT). In contrast with large-sized strut, the inherent porosity (1.87%) and section geometrical deviation (3%) of ponysize strut is greater because of the effect of thermal transform and hydrogen evolution, and the grain size is 0.5 μm. The discrepancy in microstructure, geometrical imperfection, and mechanical properties induced by size effect should be considered for the design and evaluation of SLM-fabricated complex structures.
关键词： selective laser melting,size effect,microstructure,X-ray computed tomography,mechanical properties
更新于2025-09-09 09:28:46
-
Influence of exposure time on energy consumption and mechanical properties of SLM fabricated parts
摘要： Purpose – Many process parameters in selective laser melting (SLM) can be con?gured to optimize build time, which directly relates to energy consumption, and to achieve acceptable part quality. This study aims to investigate whether energy can be effectively reduced with acceptable mechanical properties. The in?uence of exposure time is primarily focused to correlate energy consumption to mechanical properties. Design/methodology/approach – Through single-factor design and experiment result analysis, three levels of exposure time were examined in fabricating two sets of sample parts, for energy analysis and mechanical property tests. Manufacturing power pro?le was measured online, and four mechanical properties, tensile, ?exural, torsional strengths and part density, were investigated. A graphical growth rate tendency (GRT) plot is proposed to jointly analyze multiple variables. Findings – Energy consumption increases in fabricating a same part with the increase of exposure time in the tested range, but exposure time was found to in?uence build power rather than build time in the given SLM system. Mechanical properties do not increase linearly, and grow at different rates. It is found that within the tested range, increased energy consumption brought to a small improvement of part density, but a notable improvement of tensile strength and maximum torque. Practical implications – Producing quality SLM parts can be energy-effective through quantitative study. The proposed GRT plot is an intuitive visual aid to compare the growth rates of different variables, which offers more information to additive manufacturing practitioners. Originality/value – In this research, energy consumption and mechanical property are jointly analyzed for the ?rst time to advance the knowledge of energy-effective SLM fabrication. This helps additive manufacturing technology to be truly energy-ef?cient and environmental-friendly.
关键词： Mechanical properties,Energy consumption,Selective laser melting,Exposure time
更新于2025-09-09 09:28:46