The characterization of neural tissue ablation rate and corresponding heat affected zone of a 2 micron Tm3+ doped fiber laser (Conference Presentation)

2017 ◽  
Author(s):  
Andrew J. Marques ◽  
Jamil Jivraj ◽  
Robnier Reyes ◽  
Joel Ramjist ◽  
Xijia J. Gu ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Heat Affected Zone ◽  
Neural Tissue ◽  
Ablation Rate ◽  
Tissue Ablation

Microstructural Characterization of the Simulated Heat-Affected Zone of 9 Pct Ni Steel

2021 ◽  
Author(s):  
Mara Cardoso Gonçalves Rios ◽  
João da Cruz Payão Filho ◽  
Francisco Werley Cipriano Farias ◽  
Victor Hugo Pereira Moraes e Oliveira ◽  
Augusto Veríssimo Passos
Keyword(s):  
Heat Affected Zone ◽  
Microstructural Characterization

Fiber laser processing of GFRP composites and multi-objective optimization of the process using response surface methodology

2018 ◽  
Vol 53 (11) ◽  
pp. 1459-1473 ◽  
Author(s):  
Shiva Dayal Rao B ◽  
Abhijeet Sethi ◽  
Alok Kumar Das
Keyword(s):  
Response Surface Methodology ◽  
Fiber Laser ◽  
Response Surface ◽  
Process Parameters ◽  
Heat Affected Zone ◽  
Cutting Speed ◽  
Kerf Width ◽  
Laser Irradiance ◽  
Input Process ◽  
Cut Surface

In the present investigation, a continuous wave fiber laser with maximum power of 400 W was used to cut a glass fiber reinforced plastic sheet of 4.56 mm thickness using Nitrogen as assisting gas. The influence processing parameters such as laser irradiance, gas pressure, and cutting speed on the cut surface quality were investigated by using response surface methodology. The different responses of laser cut surface such as upper kerf width, taper percentage along the cut depth, and heat-affected zone on the top surface were measured to analyze the influence of input process parameters on the responses. A statistical analysis on the obtained results was conducted and found that the optimum values of different input process parameters were laser irradiance: 8.28 × 105 watt/cm2, cutting speed: 600 mm/min and assisting gas pressure: 7.84 bar. The corresponding values of responses were upper kerf width: 177.4 µm, taper 0.73%, and heat-affected zone on top surface: 109.23 µm. The confirmation experiments were conducted with the obtained optimum parameter setting and observed that the predicted values and experimental values for upper kerf width, taper percentage and top surface heat-affected zone were within the error limits of 2.52%, 1.84%, and 0.45%, respectively. Furthermore, damages like loose fibers, interlayer fractures, evaporation of matrix material and fiber breakages were observed.

Characterization of an Intra-Cavity Pumped P2O5-Doped Silica Raman Fiber Laser

2006 ◽  
Vol 13 (6) ◽  
pp. 424-426 ◽  
Author(s):  
Gilberto Anzueto-Sánchez ◽  
Alejandro Martínez-Rios ◽  
Ismael Torres-Gómez ◽  
Romeo Selvas-Aguilar ◽  
Andrey Nicolaevich Starodumov
Keyword(s):  
Fiber Laser ◽  
Raman Fiber Laser

Enhanced Cellular Activity on Conducting Polymer

2021 ◽  
pp. 734-773
Author(s):  
Rajiv Borah ◽  
Ashok Kumar
Keyword(s):  
Tissue Engineering ◽  
Conducting Polymer ◽  
Neural Tissue ◽  
Neuronal Model ◽  
Neural Tissue Engineering ◽  
Electrically Conductive ◽  
Pc12 Cell Line ◽  
Nih 3T3

This chapter includes detailed review of the research undertaken with conducting polymer (CP) based composites with chitosan (Ch) for tissue engineering till date. The beneficial role of electrically conductive biomaterials has been discussed with the possible strategies to overcome the shortcomings of CP alone through blending with Ch due to its excellent biocompatibility, biodegradability, and bioactivity. Additionally, this embodiment deals with the optimization and characterization of electrically conductive, biocompatible and biodegradable Polyaniline: Chitosan (PAni:Ch) nanocomposites as cell culture substrates for MDA-MB-231 and NIH 3T3 fibroblast in order to examine the combined effect of nanofiber structure and surface modification on cell-biomaterial interactions. The nanocomposites were further checked as a conductive scaffold for electrical stimulation of a neuronal model PC12 cell line in order to explore the potential of the materials in neural tissue engineering.

scholarly journals Electrochemical Characterization of an Optical Fiber Laser- Treated Biomaterial

2018 ◽  
Author(s):  
Eurico Felix Pieretti ◽  
Olandir Vercíno Corrêa ◽  
Marina Fuser Pillis ◽  
Maurício David Martins das Neves
Keyword(s):  
Optical Fiber ◽  
Fiber Laser ◽  
Electrochemical Characterization

Laser-Machined Microchannel Effect on Microstructure and Oxide Formation of an Ultrasonically Processed Aluminum Alloy

2015 ◽  
Vol 137 (1) ◽  
Author(s):  
S. Masurtschak ◽  
R. J. Friel ◽  
A. Gillner ◽  
J. Ryll ◽  
R. A. Harris
Keyword(s):  
Aluminum Alloy ◽  
Fiber Laser ◽  
Heat Affected Zone ◽  
Heat Input ◽  
Suitable Method ◽  
Oxide Formation ◽  
Molten Material ◽  
Ultrasonic Consolidation ◽  
High Fiber ◽  
Channel Shape

Ultrasonic consolidation (UC) has been proven to be a suitable method for fiber embedment into metal matrices. To aid successful embedment of high fiber volumes and to ensure their accurate positioning, research on producing microchannels in combination with adjacent shoulders formed by distribution of the melt onto unique UC sample surfaces with a fiber laser was carried out. This paper investigated the effect of the laser on the microstructure surrounding the channel within an Al 3003-H18 sample. The heat input and the extent of the heat-affected zone (HAZ) from one and multiple passes was examined. The paper explored the influence of air, as an assist gas, on the shoulders and possible oxide formation with regards to future bonding requirements during UC. The authors found that one laser pass resulted in a keyhole-shaped channel filled with a mixture of aluminum and oxides and a symmetrical HAZ surrounding the channel. Multiple passes resulted in the desired channel shape and a wide HAZ which appeared to be an eutectic microstructure. The distribution of molten material showed oxide formation all along the channel outline and especially within the shoulder.

Sign in / Sign up

Export Citation Format

Share Document