Influence of Processing Parameters on Laser-Assisted Reactive Sintering of a Mixture of Ni and Ti Powders

Eng Pub Date : 2024-07-15 DOI:10.3390/eng5030077

N. V. Le Sénéchal, P. H. D. da Silveira, Patrícia Freitas Rodrigues, D. Gonçalves, S. Dyer, R. Teixeira, R. H. M. de Siqueira, Milton Sergio Fernandes de Lima, D. L. Bayerlein, Andersan dos Santos Paula

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Abstract

Additive manufacturing (AM) plays a crucial role in the development of NiTi alloys, enabling the creation of complex and customized structures while optimizing properties for various biomedical and industrial applications. The aim of this paper was to investigate the influence of laser scanning speed on laser-assisted reactive sintering of a mixture of No and Ti powders. The samples were sintered at two different beam speeds, 4 and 5 4 mm/s and their morphological and microstructural characteristics were investigated. Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX) and X-ray diffraction (XRD) analyses revealed the presence of intermetallic compounds rich in Ni and Ti for both scanning speeds; however, the scanning speed of 5 mm/s produced a microstructure with greater porosity, leading to a sintered body with poorer consolidation. Thus, employing a slower beam scanning of 4 mm/s seems to be a better alternative in the laser-assisted reactive sintering of NiTi alloys.

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加工参数对镍钛混合粉激光辅助反应烧结的影响

快速成型制造（AM）在镍钛合金的发展中起着至关重要的作用，它可以制造复杂的定制结构，同时优化各种生物医学和工业应用的性能。本文旨在研究激光扫描速度对 No 和 Ti 混合粉末激光辅助反应烧结的影响。样品在两种不同的光束速度（4 和 5 4 mm/s）下烧结，并对其形态和微观结构特征进行了研究。扫描电子显微镜与能量色散 X 射线光谱（SEM/EDX）和 X 射线衍射（XRD）分析表明，在两种扫描速度下都存在富含 Ni 和 Ti 的金属间化合物；然而，5 mm/s 的扫描速度产生的微观结构孔隙率更大，导致烧结体的固结性更差。因此，在激光辅助反应烧结镍钛合金时，采用 4 毫米/秒的较慢光束扫描速度似乎是更好的选择。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Eng

CiteScore

2.10

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0.00%

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