scholarly journals Comparing the adhesion strength of 316L stainless steel joints after laser surface texturing by CO2 and fiber lasers

2020 ◽  
Vol 109 (3-4) ◽  
pp. 1059-1069
Author(s):  
Chiara Mandolfino ◽  
Muhannad Obeidi ◽  
Enrico Lertora ◽  
Dermot Brabazon
Keyword(s):  
Stainless Steel ◽  
Adhesion Strength ◽  
Fiber Lasers ◽  
316L Stainless Steel ◽  
Surface Texturing ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Steel Joints

Improving fluid retention properties of 316L stainless steel using nanosecond pulsed laser surface texturing

2020 ◽  
Vol 32 (4) ◽  
pp. 042018
Author(s):  
Mahmood Al Bashir ◽  
Rajeev Nair ◽  
Martina M. Sanchez ◽  
Anil Mahapatro
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Surface Texturing ◽  
Pulsed Laser ◽  
Fluid Retention ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Nanosecond Pulsed Laser

Laser surface texturing of Ti6Al4V alloy, stainless steel and aluminium silicon alloy

2018 ◽  
Vol 461 ◽  
pp. 117-123 ◽  
Author(s):  
Andrzej Grabowski ◽  
Maria Sozańska ◽  
Marcin Adamiak ◽  
Mirosława Kępińska ◽  
Tomasz Florian
Keyword(s):  
Stainless Steel ◽  
Surface Texturing ◽  
Laser Surface ◽  
Ti6al4v Alloy ◽  
Laser Surface Texturing ◽  
Silicon Alloy

Interface Evaluation of MCrAlY Powder Bond Coat on 316 SS Processed with Laser Irradiation

2014 ◽  
Vol 802 ◽  
pp. 409-414 ◽  
Author(s):  
Viviane Teleginski ◽  
Daniele C. Chagas ◽  
Luis Gustavo de Oliveira ◽  
Getúlio de Vasconcelos
Keyword(s):  
Stainless Steel ◽  
Laser Beam ◽  
Optical Microscopy ◽  
Bond Coat ◽  
Surface Texturing ◽  
Ceramic Coatings ◽  
Metallic Substrate ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
First Case

As aircraft and thermoelectric turbine blades work in aggressive environments (high temperatures and pressures), they are exposed to oxidation reactions. Ceramic coatings are employed to increase the turbine work temperature (improving its performance) and a bond coat (BC), base of particulate material of Ni-Cr-Al powders, which assure a good adhesion, gradual decrease in thermal expansion coefficient between the metallic substrate and the ceramic top coat, avoiding the oxidation effect in the metallic substrate. This research aims the study and comparison of two different deposition process routes of particulate materials of BC (MCrAlY) on AISI 316 stainless steel substrate. In the first case, the BC powder was pre-deposited by segregation method and irradiated by a CO2laser beam. In the second case, laser surface texturing was done on the stainless steel surface by a Yb: fiber laser beam, the BC was deposited by the same method, and further, irradiated by a CO2laser beam. The main focus of this work was to evaluate the resulting interface for both mentioned cases. For this propose, characterizations were made using the techniques of optical microscopy and roughness measurements. In the first case, homogenous layers of bond coat were obtained. Optical microscopy suggest the formation of a metallurgic bonding between the substrate and the MCrAlY. For the laser surface texturing, the surface roughness can be adjusted by the laser beam parameters.

Adhesion Strength Improvement by Laser Surface Texturing of Metallic Repair Coatings Deposited by Cold Spraying

2021 ◽  
Author(s):  
R. Kromer ◽  
R.N. Raoelison ◽  
Y. Danlos ◽  
C. Verdy ◽  
S. Costil ◽  
...  
Keyword(s):  
Adhesion Strength ◽  
Pure Aluminum ◽  
Surface Texturing ◽  
Cold Spraying ◽  
Deposition Efficiency ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Textured Surfaces ◽  
Particle Deformation ◽  
Spray Process

Abstract Cold spray process was chosen as a good candidate for dimensional restoration and protection of components. Commercially pure aluminum; aluminum-alloy or titanium were recommended for different applications. This paper investigates laser surface texturing association to enhance durability of sprayed coatings. Laser is easy automated; localized and reliable process. It was applied for prior-surface treatment. Textured surfaces were produced and compared to conventional treatments; such as grit-blasting; in terms of deposition efficiency and adhesion bond strength. Patterns promoted direct particle embedment. Particle-substrate interface exhibited significant temperature rate and strain in cavities. Intimate contacts and particle compressive states were assumed responsible for improvement. The particle deformation and bonding behaviors were evaluated and discussed for the different configurations. Thus; window of deposition was increased with laser surface texturing. Anchoring mechanisms increased two fold the adhesion strength compared to conventional pre-treatments. In one case; the interface was stronger than the coating cohesive strength.

scholarly journals Laser Surface Texturing and Characterization of Austenitic Stainless Steel for the Improvement of Its Surface Properties

2021 ◽  
Author(s):  
Yassmin Seid Ahmed ◽  
Jose Mario Paiva ◽  
Fred L. Amorim ◽  
Ricardo D. Torres ◽  
Wagner de Rossi ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Surface Texturing ◽  
Laser Surface ◽  
Laser Surface Texturing ◽  
Textured Surfaces ◽  
Aisi 304 ◽  
Steel Aisi

Abstract A detailed investigation of laser textured surfaces produced on austenitic stainless steel (AISI 304) was carried out. Three different textures were produced by a Ti sapphire laser. The processed surfaces were characterized by surface morphology, phase structure, micro-hardness, surface roughness, and wettability. A ball-on-disk tribometer was used to study the tribological performance of both untextured and textured samples. The experimental observations demonstrate that laser surface texturing (LST) improves both surface wettability and surface roughness. Average surface roughness (Ra) was increased by 350% and the contact angle was reduced from 43° to 22°. The textured surfaces show a lower coefficient of friction and better wear resistance than the untextured surface. Out of the investigated patterns, the square textures exhibited a maximum reduction of 68% in the friction coefficient and a 50% lower wear rate.

Laser Surface Texturing of Stainless Steel − Effect of Pulse Duration on Texture's Morphology and Frictional Response

2018 ◽  
Vol 21 (3) ◽  
pp. 1801016 ◽  
Author(s):  
Junjie Zhang ◽  
Dinghuai Yang ◽  
Andreas Rosenkranz ◽  
Jianguo Zhang ◽  
Liang Zhao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Pulse Duration ◽  
Surface Texturing ◽  
Laser Surface ◽  
Laser Surface Texturing
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