Effect of laser processing parameters on the quality of Ni60+Ni/MoS2 laser clad layer on titanium alloy surface

2015 ◽  
pp. 85-89
Author(s):  
M Fan ◽  
R Sun
Keyword(s):  
Titanium Alloy ◽  
Laser Processing ◽  
Processing Parameters ◽  
Alloy Surface ◽  
Clad Layer

EFFECT OF LASER PROCESSING PARAMETERS ON THE COATING'S MICROSTRUCTURE AND QUALITY

2007 ◽  
Vol 14 (05) ◽  
pp. 885-890 ◽  
Author(s):  
Y. S. TIAN ◽  
D. Y. WANG ◽  
C. Z. CHEN
Keyword(s):  
Titanium Alloy ◽  
Output Power ◽  
Laser Processing ◽  
Scanning Speed ◽  
Processing Parameters ◽  
Thickness Increase

The effect of laser processing parameters on the microstructure and quality of the coatings fabricated on titanium alloy has been investigated. Results show that the increase of the output power and the decrease of the scanning speed result in the thickness increase and the microstructure coarseness of the coatings. Overlapped fraction of the laser tracks significantly affects the coating's quality. With a lower overlapped fraction, pores and cracks easily occur in the overlapped area due to the inferior metallurgical quality.

Effect of Laser Processing Parameters on Microhole Quality of Aluminium Nitride Ceramics

2021 ◽  
Vol 871 ◽  
pp. 277-283
Author(s):  
Chun Yan Yang ◽  
Yun Hao ◽  
Bozhe Wang ◽  
Hai Yuan ◽  
Liu Hui Li
Keyword(s):  
Laser Processing ◽  
Laser Power ◽  
Picosecond Laser ◽  
Scanning Speed ◽  
Processing Parameters ◽  
Recast Layer ◽  
Aluminium Nitride ◽  
Obvious Effect ◽  
Nitride Ceramics

A picosecond laser in spin-cutting mode was used to drill 500μm diameter microholes on 150μm thick aluminium nitride ceramic. The effects of laser processing parameters such as the laser power, scanning speed, and defocus amount on the microhole quality were studied. The results show that as the laser power increases, the inlet and outlet diameters of the holes increase, the taper decreases slightly, and the thickness of the recast layer decreases evidently. The scanning speed has no obvious effect on the diameter and taper of the hole; however, the hole can not be drilled through when the speed is too large. Positive defocus can effectively reduce the taper of the hole. Under 28.5W laser power, 400Hz frequency, 200mm/s scanning speed, and zero defocus amount conditions, high-quality microholes with a taper of 0.85° were obtained.

Fabrication and Biocompatibility of Gradient Bioceramic Coatings on Titanium Alloy Substrate by Laser Cladding

2008 ◽  
Vol 368-372 ◽  
pp. 1203-1205 ◽  
Author(s):  
Min Zheng ◽  
Ding Fan ◽  
Xiu Kun Li ◽  
Qi Bin Liu ◽  
Wen Fei Li ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Laser Cladding ◽  
Laser Processing ◽  
Rare Earth Oxide ◽  
Processing Parameters ◽  
Alloy Substrate ◽  
Gradient Composition ◽  
Titanium Alloy Substrate ◽  
Bioceramic Coatings

Based on a high power CO2 laser beam passing by pyramid polygon mirror, the bioceramic coatings of gradient composition were fabricated on titanium alloy substrate (Ti-6Al-4V). The relations among laser processing parameters, microstructure and biocompatibility of the gradient bioceramic coatings were investigated. The results indicated that the contents of rare earth oxide additions had an immediate effect on the formation of bioactive phases. The gradient bioceramic coatings showed favorable biocompatibility in vivo after they were implanted into canine femur for 45, 90, and 180 days, respectively. The bioceramic coatings of Ca/P=1.4 and 0.6wt.% Y2O3 totally combined with new bones merely implanted for 45 days. Furthermore, the MTT (Methyl Thiazolyl Tetrazolium) colorimetry results of cell proliferation demonstrated that the cell growth distinctly increased on the gradient bioceramic coatings by laser cladding compared with the un-treated titanium alloy substrate.

Contrast Test of KOH Solutions Jet-Assisted Laser Etching on Al2O3 Ceramics

2012 ◽  
Vol 472-475 ◽  
pp. 2476-2479 ◽  
Author(s):  
Gen Fu Yuan ◽  
Wei Zheng ◽  
Xue Hui Chen
Keyword(s):  
Surface Roughness ◽  
Cross Section ◽  
Laser Processing ◽  
Processing Parameters ◽  
Laser Etching ◽  
Composite Processing ◽  
Regular Shape ◽  
Material Sample ◽  
Melting Slag

An experimental device of KOH solutions jet-assisted laser etching is designed, Laser-chemical combined etching technology is combined with the Medium-jet erosion processing ,and the influence on the etching capacity and cross section quality of material sample of laser processing parameters,jet processing parameters are studied. The results show that the laser processing parameters and jet processing have a decisive impact on the quality of the workpiece, the composite processing technology can remove most of melting slag which are produced by the laser processing, the surface roughness are effectively reduced. The blind holes of the machined materials have the regular shape.

A New Method for Processing Ceramics with Cracked Glaze

2011 ◽  
Vol 418-420 ◽  
pp. 63-66
Author(s):  
Ji Wei Fan ◽  
Xiao Peng Li ◽  
Zhao Jun Zhang ◽  
Wang Xi Zhang ◽  
Zhi Qiang Jiao ◽  
...  
Keyword(s):  
Laser Processing ◽  
Ceramic Materials ◽  
Processing Parameters ◽  
Processing Method ◽  
New Method ◽  
Ceramic Surface ◽  
Laser Technique

Laser processing ceramic materials is a new application of laser technique. This paper presents the study of making cracked glaze surface by laser processing. Proposed the applicable the composition of glaze, the main processing parameters of laser processing, and discussed the factors which may affect the quality of cracked glazing surface. It indicates that laser processing could be a new and easy processing method to produce the cracked glazing on the ceramic surface.

LASER DICING OF SILICON WAFER

2008 ◽  
Vol 15 (01n02) ◽  
pp. 153-159 ◽  
Author(s):  
Y. TANG ◽  
J. Y. H. FUH ◽  
H. T. LOH ◽  
Y. S. WONG ◽  
Y. K. LIM
Keyword(s):  
Laser Processing ◽  
Pump Energy ◽  
Processing Parameters ◽  
Heat Affect Zone ◽  
Laser Repetition Rate ◽  
Cut Quality ◽  
Diamond Saw ◽  
Number Of Passes ◽  
Si Wafer

The effect of various laser processing parameters on the kerf width and cut quality of Si wafer as well as encapsulated Si wafer is investigated. The parameters are then optimized to minimize the heat affect zone and obtain the best possible cut quality. It has been found that oxygen is the most suitable assist gas for laser dicing and that the highest gas pressure may not produce the best cut quality. The effect of laser repetition rate, pump energy, feed rate, and number of passes are also studied. Under optimized parameters, the cut quality of Si wafer using laser dicing is found to be comparable to diamond saw dicing.

Influence of Nanosecond Laser Processing Parameters on the Titanium Alloy Surfaces Colorization

2017 ◽  
Vol 744 ◽  
pp. 223-227 ◽  
Author(s):  
Chun Ling Li ◽  
Chang Hou Lu
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Focal Plane ◽  
Laser Processing ◽  
Color Space ◽  
Processing Parameters ◽  
B Value ◽  
Nanosecond Laser ◽  
Scanning Velocity ◽  
The Impact

Laser color marking experiments on titanium alloy substrates were carried out to investigate the impact of selected laser processing parameters on the resulting colors. The CIE L*a*b* color space was used to quantify these colors. The surface roughness of the marked color areas was measured by using a TR200 hand-held surface roughness instrument. The relationships between laser parameters and CIE L*a*b* values and surface roughness of the colors were obtained. Results clearly showed that different colors ranging from blue and gray to yellow were produced. Some colors can be obtained by different sets of parameters, while some colors can only be produced by a specific combination of process parameters due to the existence of different forms of heat input and thermal process. The b* value increased to the maximum which represented yellow then decreased. The surface roughness of color areas decreased with the increase of focal plane offset, scanning velocity, or hatch space.

scholarly journals Modeling the hardness of the titanium alloy subjected to laser processing

2020 ◽  
Vol 329 ◽  
pp. 03020
Author(s):  
Vladimir Gusev ◽  
Valentin Morozov ◽  
Dmitry Gavrilov
Keyword(s):  
Titanium Alloy ◽  
Surface Layer ◽  
Laser Processing ◽  
Factor Model ◽  
Radiation Power ◽  
Treatment Mode ◽  
Manufacturing Enterprises ◽  
Laser Equipment ◽  
Laser Focusing

The article considers the influence of the radiation power W, the longitudinal feed Spr of the laser beam and the distance L from the protective glass of the laser focusing head to the workpiece on the hardness Hv of the titanium alloy TiTaN. A multi-factor model is established that relates the surface layer hardness to the input factors of laser processing and allows you to quickly assign a laser treatment mode and to control it in order to improve the quality of the processed layer. The power W has the greatest effect on the hardness of the surface layer. With increasing W, the hardness increases. Increasing the feed Spr leads to a decrease in the Hv parameter. The effect of the distance L is similar to the radiation power, but the degree of influence of L is more than half as small as W. The developed method of operational assignment of the laser processing mode allows to reduce the auxiliary time for performing the technological operation. The research results are relevant for manufacturing enterprises that implement laser processing processes, as well as for design organizations that develop modern laser equipment.

Accurate preparation of mesoscopic geometric characteristics of ball end milling cutter and optimization of cutting performance

2021 ◽  
pp. 095440542110285
Author(s):  
Shucai Yang ◽  
Pei Han ◽  
Xiao Liu ◽  
Xin Tong
Keyword(s):  
Titanium Alloy ◽  
Laser Processing ◽  
End Milling ◽  
Cutting Temperature ◽  
Processing Parameters ◽  
Cutting Performance ◽  
Milling Cutter ◽  
Ball End Milling ◽  
Edge Radius ◽  
Blunt Edge

According to the difficult machinability of titanium alloy, the research shows that the surface micro-textured technology can reduce the friction force and cutting temperature in the cutter-workpiece contact area. Starting with the precise preparation of micro textures by laser processing technology, this paper takes ball-end milling cutter milling titanium alloy as the research object, studies the influence of laser processing parameters on micro-textured size parameters, and optimizes the laser processing parameters as follows: laser power P = 40 W, scanning speed V = 1700 mm/s, scanning times N = 7 times, and spot diameter D = 40 μm. The distribution of temperature field and stress field during laser processing is analyzed, and the accuracy of the influence rule of laser processing parameters on micro-textured size parameters is verified, thus realizing the purpose of accurately preparing micro textures. The interactive influence of mesoscopic geometric features on the cutting performance of ball-end milling cutter is analyzed, and the genetic algorithm is used to optimize the parameters. The results show that the main factor affecting the force-heat characteristics of the tool is the blunt edge radius, and the interaction between the blunt radius of the cutting edge and the distance from blade is obvious. The optimized mesoscopic geometric parameters are as follows: the blunt edge radius is 20 μm, and the distance from blade is 110 μm, the micro-textured diameter is 30 μm, and the micro-textured spacing is 175 μm. The research content of this paper lays a foundation for efficient cutting of titanium alloy materials.

Experimental Study of Low-Pressure Water Jet Assisted Laser Processing of Al2O3 Ceramic

2013 ◽  
Vol 652-654 ◽  
pp. 2363-2368
Author(s):  
Jin Hua Wang ◽  
Gen Fu Yuan
Keyword(s):  
Surface Quality ◽  
Laser Processing ◽  
Thermal Deformation ◽  
Low Pressure ◽  
Processing Parameters ◽  
Water Jet ◽  
Good Surface ◽  
Hard And Brittle Material ◽  
Pressure Water

Recast layer, micro cracks and thermal deformation limited the improvement of the surface quality of laser processing in precision machining of hard and brittle material. This paper presents a new method which combines low-pressure water jet with laser processing. A comprehensive study on the influence of laser processing parameters on surface quality of an Al2O3 ceramic sheet is presented. The experiment was conducted using ND: YAG laser machine and low-pressure water jet was used as assist. The surface quality of normal laser processing and low-pressure water jet assisted laser processing was comparative analyzed using a 3-D microscopy. Experiment proves that the composite processing of low-pressure water jet assisted laser processing can obtain good surface quality, slight moltenslag and thermal deformation, compared with the normal laser processing.

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