Effect of pulse frequency on the morphology, microstructure, and corrosion resistance of high-nitrogen steel prepared by laser directed energy deposition

2021 ◽  
pp. 127450
Author(s):  
Kun Yang ◽  
Z.D. Wang ◽  
M.Z. Chen ◽  
H.F. Lan ◽  
G.F. Sun ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Energy Deposition ◽  
Pulse Frequency ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Directed Energy Deposition ◽  
Nitrogen Steel ◽  
Directed Energy

scholarly journals In-Situ Laser Directed Energy Deposition of Biomedical Ti-Nb and Ti-Zr-Nb Alloys from Elemental Powders

Metals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1205
Author(s):  
Felipe Arias-González ◽  
Alejandra Rodríguez-Contreras ◽  
Miquel Punset ◽  
José María Manero ◽  
Óscar Barro ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Energy Deposition ◽  
Titanium Implants ◽  
Protective Oxide ◽  
Directed Energy Deposition ◽  
Protective Oxide Film ◽  
Directed Energy ◽  
Stable Passive

In order to achieve the required properties of titanium implants, more resources and research are needed to turn into reality the dream of developing the perfect implant material. The objective of this study was to evaluate the viability of the Laser Directed Energy Deposition to produce biomedical Ti-Nb and Ti-Zr-Nb alloys from elemental powders (Ti, Nb and Zr). The Laser Directed Energy Deposition is an additive manufacturing process used to build a component by delivering energy and material simultaneously. The material is supplied in the form of particles or wire and a laser beam is employed to melt material that is selectively deposited on a specified surface, where it solidifies. Samples with different compositions are characterized to analyze their morphology, microstructure, constituent phases, mechanical properties, corrosion resistance and cytocompatibility. Laser-deposited Ti-Nb and Ti-Zr-Nb alloys show no relevant defects, such as pores or cracks. Titanium alloys with lower elastic modulus and a significantly higher hardness than Ti grade 2 were generated, therefore a better wear resistance could be expected from them. Moreover, their corrosion resistance is excellent due to the formation of a stable passive protective oxide film on the surface of the material; in addition, they also possess outstanding cytocompatibility.

scholarly journals Dynamic Mechanical Properties of High Nitrogen Steel under Combined Loading

2021 ◽  
Vol 1855 (1) ◽  
pp. 012009
Author(s):  
Zizhen Yang ◽  
Cheng Miao ◽  
Hailing Wu ◽  
Tao Zhong ◽  
Lihong Bai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dynamic Mechanical Properties ◽  
Combined Loading ◽  
High Nitrogen Steel ◽  
High Nitrogen ◽  
Dynamic Mechanical ◽  
Nitrogen Steel

scholarly journals Correction to: Characterization and Optimization of Process Parameters for Directed Energy Deposition Powder-Fed Laser System

2021 ◽  
Author(s):  
Daniel Andres Rojas Perilla ◽  
Johan Grass Nuñez ◽  
German Alberto Barragan De Los Rios ◽  
Fabio Edson Mariani ◽  
Reginaldo Teixeira Coelho
Keyword(s):  
Process Parameters ◽  
Energy Deposition ◽  
Laser System ◽  
Directed Energy Deposition ◽  
Optimization Of Process Parameters ◽  
Directed Energy
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