Printing of NiTinol parts with characteristics respecting the general microstructural, compositional and mechanical requirements of bone replacement implants

NiTinol is considered to be an attractive candidate alloy for biomedical applications. The aim of this research was to obtain porous NiTinol parts that respected the general microstructural (having 30–80 vol% interconnected pores and pore sizes in the range of 100–600 μm), compositional (an impurity...

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Veröffentlicht in:	Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2022-04, Vol.839, p.142839, Article 142839
Hauptverfasser:	Khanlari, Khashayar, Shi, Qi, Yan, Xingchen, Hu, Ke, Tan, Chong, Kelly, Piaras, Zhang, Wen, Cao, Peng, Wang, Xiaojian, Liu, Xin
Format:	Artikel
Sprache:	eng
Schlagworte:	Alloy powders Biomedical materials Bone replacement implants Composition Elongation Heat treating Heat treatment Intermetallic compounds LPBF printing Mechanical properties Microstructure Modulus of elasticity Nickel titanides NiTinol Phase transitions Porosity Porous metals Post-processing heat treatments Powder beds Printing Process parameters Shape memory alloys Thickness
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Beschreibung
Zusammenfassung:	NiTinol is considered to be an attractive candidate alloy for biomedical applications. The aim of this research was to obtain porous NiTinol parts that respected the general microstructural (having 30–80 vol% interconnected pores and pore sizes in the range of 100–600 μm), compositional (an impurity content of less than 500 ppm) and mechanical (an elastic modulus close to that of cortical bone (10–20 GPa) or cancellous bone (
ISSN:	0921-5093 1873-4936
DOI:	10.1016/j.msea.2022.142839