Ti6Al4V Scaffolds Produced by Selective Laser Melting: Influence of Chemical Etching on Powder Removal and Mechanical Properties

IF 2 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Engineering and Performance Pub Date : 2025-04-30 DOI:10.1007/s11665-024-10080-x

Xinjie Zhang, Shuai Liu, Yude Liu, Wentian Shi, Fu Zhao, Yi Liu

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引用次数: 0

Abstract

Additive manufacturing is being used to produce medical orthopedic implants. However, the Ti6Al4V scaffolds formed by selective laser melting (SLM) limited by surface roughness. The chemical etching method have used to treat Ti6Al4V owing to the liquidity. The aim of this study is to investigate the effects of different concentration of hydrofluoric and nitric acids mixtures and times on the surface morphology and mechanical properties of Ti6Al4V scaffolds formed by SLM. The results showed that with the increase of concentration of etchant and times, the surface roughness decreased, and the mechanical properties decreased. Different concentration of etchant be conducive to remove the different shapes of adhering powder. As the best condition of concentration is 1:8 and the time is 16 min, the surface roughness is 8.4 μm, the adhering powder of 96% are removed. Too much time can cause overcorrosion. However, chemical etching weaken the strength of the Ti6Al4V scaffolds in comparison with an as-built structure. The addition of nitric acid can effectively prevent the degradation of mechanical properties by dissolving hydrogen.

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选择性激光熔化制备Ti6Al4V支架：化学蚀刻对粉末去除和力学性能的影响

增材制造正被用于生产医用骨科植入物。然而，选择性激光熔化（SLM）形成的Ti6Al4V支架受表面粗糙度的限制。由于Ti6Al4V的流动性差，采用化学蚀刻法对其进行处理。本研究的目的是研究不同浓度的氢氟酸和硝酸混合物以及时间对SLM形成的Ti6Al4V支架表面形貌和力学性能的影响。结果表明：随着蚀刻剂浓度和次数的增加，表面粗糙度降低，力学性能下降；不同浓度的蚀刻剂有利于去除不同形状的附着粉末。当最佳浓度为1:8，时间为16 min时，表面粗糙度为8.4 μm， 96%的附着粉被去除。时间过长会导致腐蚀过度。然而，化学蚀刻会削弱Ti6Al4V支架的强度，而不是构建的结构。硝酸的加入能有效防止氢溶解导致的力学性能退化。

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来源期刊

Journal of Materials Engineering and Performance 工程技术-材料科学：综合

CiteScore

3.90

自引率

13.00%

发文量

1120

审稿时长

4.9 months

期刊介绍： ASM International''s Journal of Materials Engineering and Performance focuses on solving day-to-day engineering challenges, particularly those involving components for larger systems. The journal presents a clear understanding of relationships between materials selection, processing, applications and performance. The Journal of Materials Engineering covers all aspects of materials selection, design, processing, characterization and evaluation, including how to improve materials properties through processes and process control of casting, forming, heat treating, surface modification and coating, and fabrication. Testing and characterization (including mechanical and physical tests, NDE, metallography, failure analysis, corrosion resistance, chemical analysis, surface characterization, and microanalysis of surfaces, features and fractures), and industrial performance measurement are also covered